1600 lines
45 KiB
C
1600 lines
45 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Samsung CSIS MIPI CSI-2 receiver driver.
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*
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* The Samsung CSIS IP is a MIPI CSI-2 receiver found in various NXP i.MX7 and
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* i.MX8 SoCs. The i.MX7 features version 3.3 of the IP, while i.MX8 features
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* version 3.6.3.
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*
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* Copyright (C) 2019 Linaro Ltd
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* Copyright (C) 2015-2016 Freescale Semiconductor, Inc. All Rights Reserved.
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* Copyright (C) 2011 - 2013 Samsung Electronics Co., Ltd.
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*
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*/
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#include <linux/clk.h>
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#include <linux/debugfs.h>
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#include <linux/delay.h>
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#include <linux/errno.h>
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#include <linux/interrupt.h>
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#include <linux/io.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/platform_device.h>
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#include <linux/pm_runtime.h>
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#include <linux/regulator/consumer.h>
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#include <linux/reset.h>
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#include <linux/spinlock.h>
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#include <media/v4l2-common.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-fwnode.h>
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#include <media/v4l2-mc.h>
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#include <media/v4l2-subdev.h>
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#define CSIS_DRIVER_NAME "imx-mipi-csis"
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#define CSIS_PAD_SINK 0
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#define CSIS_PAD_SOURCE 1
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#define CSIS_PADS_NUM 2
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#define MIPI_CSIS_DEF_PIX_WIDTH 640
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#define MIPI_CSIS_DEF_PIX_HEIGHT 480
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/* Register map definition */
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/* CSIS version */
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#define MIPI_CSIS_VERSION 0x00
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#define MIPI_CSIS_VERSION_IMX7D 0x03030505
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#define MIPI_CSIS_VERSION_IMX8MP 0x03060301
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/* CSIS common control */
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#define MIPI_CSIS_CMN_CTRL 0x04
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#define MIPI_CSIS_CMN_CTRL_UPDATE_SHADOW BIT(16)
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#define MIPI_CSIS_CMN_CTRL_INTER_MODE BIT(10)
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#define MIPI_CSIS_CMN_CTRL_UPDATE_SHADOW_CTRL BIT(2)
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#define MIPI_CSIS_CMN_CTRL_RESET BIT(1)
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#define MIPI_CSIS_CMN_CTRL_ENABLE BIT(0)
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#define MIPI_CSIS_CMN_CTRL_LANE_NR_OFFSET 8
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#define MIPI_CSIS_CMN_CTRL_LANE_NR_MASK (3 << 8)
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/* CSIS clock control */
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#define MIPI_CSIS_CLK_CTRL 0x08
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#define MIPI_CSIS_CLK_CTRL_CLKGATE_TRAIL_CH3(x) ((x) << 28)
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#define MIPI_CSIS_CLK_CTRL_CLKGATE_TRAIL_CH2(x) ((x) << 24)
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#define MIPI_CSIS_CLK_CTRL_CLKGATE_TRAIL_CH1(x) ((x) << 20)
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#define MIPI_CSIS_CLK_CTRL_CLKGATE_TRAIL_CH0(x) ((x) << 16)
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#define MIPI_CSIS_CLK_CTRL_CLKGATE_EN_MSK (0xf << 4)
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#define MIPI_CSIS_CLK_CTRL_WCLK_SRC BIT(0)
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/* CSIS Interrupt mask */
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#define MIPI_CSIS_INT_MSK 0x10
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#define MIPI_CSIS_INT_MSK_EVEN_BEFORE BIT(31)
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#define MIPI_CSIS_INT_MSK_EVEN_AFTER BIT(30)
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#define MIPI_CSIS_INT_MSK_ODD_BEFORE BIT(29)
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#define MIPI_CSIS_INT_MSK_ODD_AFTER BIT(28)
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#define MIPI_CSIS_INT_MSK_FRAME_START BIT(24)
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#define MIPI_CSIS_INT_MSK_FRAME_END BIT(20)
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#define MIPI_CSIS_INT_MSK_ERR_SOT_HS BIT(16)
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#define MIPI_CSIS_INT_MSK_ERR_LOST_FS BIT(12)
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#define MIPI_CSIS_INT_MSK_ERR_LOST_FE BIT(8)
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#define MIPI_CSIS_INT_MSK_ERR_OVER BIT(4)
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#define MIPI_CSIS_INT_MSK_ERR_WRONG_CFG BIT(3)
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#define MIPI_CSIS_INT_MSK_ERR_ECC BIT(2)
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#define MIPI_CSIS_INT_MSK_ERR_CRC BIT(1)
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#define MIPI_CSIS_INT_MSK_ERR_UNKNOWN BIT(0)
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/* CSIS Interrupt source */
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#define MIPI_CSIS_INT_SRC 0x14
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#define MIPI_CSIS_INT_SRC_EVEN_BEFORE BIT(31)
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#define MIPI_CSIS_INT_SRC_EVEN_AFTER BIT(30)
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#define MIPI_CSIS_INT_SRC_EVEN BIT(30)
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#define MIPI_CSIS_INT_SRC_ODD_BEFORE BIT(29)
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#define MIPI_CSIS_INT_SRC_ODD_AFTER BIT(28)
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#define MIPI_CSIS_INT_SRC_ODD (0x3 << 28)
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#define MIPI_CSIS_INT_SRC_NON_IMAGE_DATA (0xf << 28)
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#define MIPI_CSIS_INT_SRC_FRAME_START BIT(24)
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#define MIPI_CSIS_INT_SRC_FRAME_END BIT(20)
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#define MIPI_CSIS_INT_SRC_ERR_SOT_HS BIT(16)
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#define MIPI_CSIS_INT_SRC_ERR_LOST_FS BIT(12)
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#define MIPI_CSIS_INT_SRC_ERR_LOST_FE BIT(8)
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#define MIPI_CSIS_INT_SRC_ERR_OVER BIT(4)
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#define MIPI_CSIS_INT_SRC_ERR_WRONG_CFG BIT(3)
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#define MIPI_CSIS_INT_SRC_ERR_ECC BIT(2)
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#define MIPI_CSIS_INT_SRC_ERR_CRC BIT(1)
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#define MIPI_CSIS_INT_SRC_ERR_UNKNOWN BIT(0)
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#define MIPI_CSIS_INT_SRC_ERRORS 0xfffff
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/* D-PHY status control */
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#define MIPI_CSIS_DPHY_STATUS 0x20
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#define MIPI_CSIS_DPHY_STATUS_ULPS_DAT BIT(8)
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#define MIPI_CSIS_DPHY_STATUS_STOPSTATE_DAT BIT(4)
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#define MIPI_CSIS_DPHY_STATUS_ULPS_CLK BIT(1)
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#define MIPI_CSIS_DPHY_STATUS_STOPSTATE_CLK BIT(0)
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/* D-PHY common control */
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#define MIPI_CSIS_DPHY_CMN_CTRL 0x24
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#define MIPI_CSIS_DPHY_CMN_CTRL_HSSETTLE(n) ((n) << 24)
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#define MIPI_CSIS_DPHY_CMN_CTRL_HSSETTLE_MASK GENMASK(31, 24)
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#define MIPI_CSIS_DPHY_CMN_CTRL_CLKSETTLE(n) ((n) << 22)
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#define MIPI_CSIS_DPHY_CMN_CTRL_CLKSETTLE_MASK GENMASK(23, 22)
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#define MIPI_CSIS_DPHY_CMN_CTRL_DPDN_SWAP_CLK BIT(6)
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#define MIPI_CSIS_DPHY_CMN_CTRL_DPDN_SWAP_DAT BIT(5)
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#define MIPI_CSIS_DPHY_CMN_CTRL_ENABLE_DAT BIT(1)
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#define MIPI_CSIS_DPHY_CMN_CTRL_ENABLE_CLK BIT(0)
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#define MIPI_CSIS_DPHY_CMN_CTRL_ENABLE (0x1f << 0)
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/* D-PHY Master and Slave Control register Low */
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#define MIPI_CSIS_DPHY_BCTRL_L 0x30
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#define MIPI_CSIS_DPHY_BCTRL_L_USER_DATA_PATTERN_LOW(n) (((n) & 3U) << 30)
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#define MIPI_CSIS_DPHY_BCTRL_L_BIAS_REF_VOLT_715MV (0 << 28)
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#define MIPI_CSIS_DPHY_BCTRL_L_BIAS_REF_VOLT_724MV (1 << 28)
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#define MIPI_CSIS_DPHY_BCTRL_L_BIAS_REF_VOLT_733MV (2 << 28)
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#define MIPI_CSIS_DPHY_BCTRL_L_BIAS_REF_VOLT_706MV (3 << 28)
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#define MIPI_CSIS_DPHY_BCTRL_L_BGR_CHOPPER_FREQ_3MHZ (0 << 27)
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#define MIPI_CSIS_DPHY_BCTRL_L_BGR_CHOPPER_FREQ_1_5MHZ (1 << 27)
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#define MIPI_CSIS_DPHY_BCTRL_L_VREG12_EXTPWR_EN_CTL BIT(26)
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#define MIPI_CSIS_DPHY_BCTRL_L_REG_12P_LVL_CTL_1_2V (0 << 24)
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#define MIPI_CSIS_DPHY_BCTRL_L_REG_12P_LVL_CTL_1_23V (1 << 24)
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#define MIPI_CSIS_DPHY_BCTRL_L_REG_12P_LVL_CTL_1_17V (2 << 24)
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#define MIPI_CSIS_DPHY_BCTRL_L_REG_12P_LVL_CTL_1_26V (3 << 24)
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#define MIPI_CSIS_DPHY_BCTRL_L_REG_1P2_LVL_SEL BIT(23)
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#define MIPI_CSIS_DPHY_BCTRL_L_LP_RX_HYS_LVL_80MV (0 << 21)
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#define MIPI_CSIS_DPHY_BCTRL_L_LP_RX_HYS_LVL_100MV (1 << 21)
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#define MIPI_CSIS_DPHY_BCTRL_L_LP_RX_HYS_LVL_120MV (2 << 21)
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#define MIPI_CSIS_DPHY_BCTRL_L_LP_RX_HYS_LVL_140MV (3 << 21)
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#define MIPI_CSIS_DPHY_BCTRL_L_VREF_SRC_SEL BIT(20)
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#define MIPI_CSIS_DPHY_BCTRL_L_LP_RX_VREF_LVL_715MV (0 << 18)
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#define MIPI_CSIS_DPHY_BCTRL_L_LP_RX_VREF_LVL_743MV (1 << 18)
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#define MIPI_CSIS_DPHY_BCTRL_L_LP_RX_VREF_LVL_650MV (2 << 18)
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#define MIPI_CSIS_DPHY_BCTRL_L_LP_RX_VREF_LVL_682MV (3 << 18)
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#define MIPI_CSIS_DPHY_BCTRL_L_LP_RX_PULSE_REJECT BIT(17)
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#define MIPI_CSIS_DPHY_BCTRL_L_MSTRCLK_LP_SLEW_RATE_DOWN_0 (0 << 15)
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#define MIPI_CSIS_DPHY_BCTRL_L_MSTRCLK_LP_SLEW_RATE_DOWN_15P (1 << 15)
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#define MIPI_CSIS_DPHY_BCTRL_L_MSTRCLK_LP_SLEW_RATE_DOWN_30P (3 << 15)
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#define MIPI_CSIS_DPHY_BCTRL_L_MSTRCLK_LP_SLEW_RATE_UP BIT(14)
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#define MIPI_CSIS_DPHY_BCTRL_L_LP_CD_HYS_60MV (0 << 13)
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#define MIPI_CSIS_DPHY_BCTRL_L_LP_CD_HYS_70MV (1 << 13)
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#define MIPI_CSIS_DPHY_BCTRL_L_BGR_CHOPPER_EN BIT(12)
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#define MIPI_CSIS_DPHY_BCTRL_L_ERRCONTENTION_LP_EN BIT(11)
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#define MIPI_CSIS_DPHY_BCTRL_L_TXTRIGGER_CLK_EN BIT(10)
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#define MIPI_CSIS_DPHY_BCTRL_L_B_DPHYCTRL(n) (((n) * 25 / 1000000) << 0)
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/* D-PHY Master and Slave Control register High */
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#define MIPI_CSIS_DPHY_BCTRL_H 0x34
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/* D-PHY Slave Control register Low */
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#define MIPI_CSIS_DPHY_SCTRL_L 0x38
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/* D-PHY Slave Control register High */
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#define MIPI_CSIS_DPHY_SCTRL_H 0x3c
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/* ISP Configuration register */
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#define MIPI_CSIS_ISP_CONFIG_CH(n) (0x40 + (n) * 0x10)
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#define MIPI_CSIS_ISPCFG_MEM_FULL_GAP_MSK (0xff << 24)
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#define MIPI_CSIS_ISPCFG_MEM_FULL_GAP(x) ((x) << 24)
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#define MIPI_CSIS_ISPCFG_PIXEL_MODE_SINGLE (0 << 12)
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#define MIPI_CSIS_ISPCFG_PIXEL_MODE_DUAL (1 << 12)
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#define MIPI_CSIS_ISPCFG_PIXEL_MODE_QUAD (2 << 12) /* i.MX8M[MNP] only */
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#define MIPI_CSIS_ISPCFG_PIXEL_MASK (3 << 12)
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#define MIPI_CSIS_ISPCFG_ALIGN_32BIT BIT(11)
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#define MIPI_CSIS_ISPCFG_FMT(fmt) ((fmt) << 2)
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#define MIPI_CSIS_ISPCFG_FMT_MASK (0x3f << 2)
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/* ISP Image Resolution register */
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#define MIPI_CSIS_ISP_RESOL_CH(n) (0x44 + (n) * 0x10)
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#define CSIS_MAX_PIX_WIDTH 0xffff
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#define CSIS_MAX_PIX_HEIGHT 0xffff
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/* ISP SYNC register */
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#define MIPI_CSIS_ISP_SYNC_CH(n) (0x48 + (n) * 0x10)
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#define MIPI_CSIS_ISP_SYNC_HSYNC_LINTV_OFFSET 18
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#define MIPI_CSIS_ISP_SYNC_VSYNC_SINTV_OFFSET 12
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#define MIPI_CSIS_ISP_SYNC_VSYNC_EINTV_OFFSET 0
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/* ISP shadow registers */
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#define MIPI_CSIS_SDW_CONFIG_CH(n) (0x80 + (n) * 0x10)
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#define MIPI_CSIS_SDW_RESOL_CH(n) (0x84 + (n) * 0x10)
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#define MIPI_CSIS_SDW_SYNC_CH(n) (0x88 + (n) * 0x10)
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/* Debug control register */
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#define MIPI_CSIS_DBG_CTRL 0xc0
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#define MIPI_CSIS_DBG_INTR_MSK 0xc4
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#define MIPI_CSIS_DBG_INTR_MSK_DT_NOT_SUPPORT BIT(25)
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#define MIPI_CSIS_DBG_INTR_MSK_DT_IGNORE BIT(24)
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#define MIPI_CSIS_DBG_INTR_MSK_ERR_FRAME_SIZE BIT(20)
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#define MIPI_CSIS_DBG_INTR_MSK_TRUNCATED_FRAME BIT(16)
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#define MIPI_CSIS_DBG_INTR_MSK_EARLY_FE BIT(12)
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#define MIPI_CSIS_DBG_INTR_MSK_EARLY_FS BIT(8)
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#define MIPI_CSIS_DBG_INTR_MSK_CAM_VSYNC_FALL BIT(4)
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#define MIPI_CSIS_DBG_INTR_MSK_CAM_VSYNC_RISE BIT(0)
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#define MIPI_CSIS_DBG_INTR_SRC 0xc8
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#define MIPI_CSIS_DBG_INTR_SRC_DT_NOT_SUPPORT BIT(25)
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#define MIPI_CSIS_DBG_INTR_SRC_DT_IGNORE BIT(24)
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#define MIPI_CSIS_DBG_INTR_SRC_ERR_FRAME_SIZE BIT(20)
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#define MIPI_CSIS_DBG_INTR_SRC_TRUNCATED_FRAME BIT(16)
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#define MIPI_CSIS_DBG_INTR_SRC_EARLY_FE BIT(12)
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#define MIPI_CSIS_DBG_INTR_SRC_EARLY_FS BIT(8)
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#define MIPI_CSIS_DBG_INTR_SRC_CAM_VSYNC_FALL BIT(4)
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#define MIPI_CSIS_DBG_INTR_SRC_CAM_VSYNC_RISE BIT(0)
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#define MIPI_CSIS_FRAME_COUNTER_CH(n) (0x0100 + (n) * 4)
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/* Non-image packet data buffers */
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#define MIPI_CSIS_PKTDATA_ODD 0x2000
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#define MIPI_CSIS_PKTDATA_EVEN 0x3000
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#define MIPI_CSIS_PKTDATA_SIZE SZ_4K
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#define DEFAULT_SCLK_CSIS_FREQ 166000000UL
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/* MIPI CSI-2 Data Types */
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#define MIPI_CSI2_DATA_TYPE_YUV420_8 0x18
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#define MIPI_CSI2_DATA_TYPE_YUV420_10 0x19
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#define MIPI_CSI2_DATA_TYPE_LE_YUV420_8 0x1a
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#define MIPI_CSI2_DATA_TYPE_CS_YUV420_8 0x1c
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#define MIPI_CSI2_DATA_TYPE_CS_YUV420_10 0x1d
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#define MIPI_CSI2_DATA_TYPE_YUV422_8 0x1e
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#define MIPI_CSI2_DATA_TYPE_YUV422_10 0x1f
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#define MIPI_CSI2_DATA_TYPE_RGB565 0x22
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#define MIPI_CSI2_DATA_TYPE_RGB666 0x23
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#define MIPI_CSI2_DATA_TYPE_RGB888 0x24
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#define MIPI_CSI2_DATA_TYPE_RAW6 0x28
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#define MIPI_CSI2_DATA_TYPE_RAW7 0x29
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#define MIPI_CSI2_DATA_TYPE_RAW8 0x2a
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#define MIPI_CSI2_DATA_TYPE_RAW10 0x2b
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#define MIPI_CSI2_DATA_TYPE_RAW12 0x2c
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#define MIPI_CSI2_DATA_TYPE_RAW14 0x2d
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#define MIPI_CSI2_DATA_TYPE_USER(x) (0x30 + (x))
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struct mipi_csis_event {
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bool debug;
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u32 mask;
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const char * const name;
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unsigned int counter;
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};
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static const struct mipi_csis_event mipi_csis_events[] = {
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/* Errors */
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{ false, MIPI_CSIS_INT_SRC_ERR_SOT_HS, "SOT Error" },
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{ false, MIPI_CSIS_INT_SRC_ERR_LOST_FS, "Lost Frame Start Error" },
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{ false, MIPI_CSIS_INT_SRC_ERR_LOST_FE, "Lost Frame End Error" },
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{ false, MIPI_CSIS_INT_SRC_ERR_OVER, "FIFO Overflow Error" },
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{ false, MIPI_CSIS_INT_SRC_ERR_WRONG_CFG, "Wrong Configuration Error" },
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{ false, MIPI_CSIS_INT_SRC_ERR_ECC, "ECC Error" },
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{ false, MIPI_CSIS_INT_SRC_ERR_CRC, "CRC Error" },
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{ false, MIPI_CSIS_INT_SRC_ERR_UNKNOWN, "Unknown Error" },
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{ true, MIPI_CSIS_DBG_INTR_SRC_DT_NOT_SUPPORT, "Data Type Not Supported" },
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{ true, MIPI_CSIS_DBG_INTR_SRC_DT_IGNORE, "Data Type Ignored" },
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{ true, MIPI_CSIS_DBG_INTR_SRC_ERR_FRAME_SIZE, "Frame Size Error" },
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{ true, MIPI_CSIS_DBG_INTR_SRC_TRUNCATED_FRAME, "Truncated Frame" },
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{ true, MIPI_CSIS_DBG_INTR_SRC_EARLY_FE, "Early Frame End" },
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{ true, MIPI_CSIS_DBG_INTR_SRC_EARLY_FS, "Early Frame Start" },
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/* Non-image data receive events */
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{ false, MIPI_CSIS_INT_SRC_EVEN_BEFORE, "Non-image data before even frame" },
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{ false, MIPI_CSIS_INT_SRC_EVEN_AFTER, "Non-image data after even frame" },
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{ false, MIPI_CSIS_INT_SRC_ODD_BEFORE, "Non-image data before odd frame" },
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{ false, MIPI_CSIS_INT_SRC_ODD_AFTER, "Non-image data after odd frame" },
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/* Frame start/end */
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{ false, MIPI_CSIS_INT_SRC_FRAME_START, "Frame Start" },
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{ false, MIPI_CSIS_INT_SRC_FRAME_END, "Frame End" },
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{ true, MIPI_CSIS_DBG_INTR_SRC_CAM_VSYNC_FALL, "VSYNC Falling Edge" },
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{ true, MIPI_CSIS_DBG_INTR_SRC_CAM_VSYNC_RISE, "VSYNC Rising Edge" },
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};
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#define MIPI_CSIS_NUM_EVENTS ARRAY_SIZE(mipi_csis_events)
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enum mipi_csis_clk {
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MIPI_CSIS_CLK_PCLK,
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MIPI_CSIS_CLK_WRAP,
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MIPI_CSIS_CLK_PHY,
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MIPI_CSIS_CLK_AXI,
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};
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static const char * const mipi_csis_clk_id[] = {
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"pclk",
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"wrap",
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"phy",
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"axi",
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};
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enum mipi_csis_version {
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MIPI_CSIS_V3_3,
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MIPI_CSIS_V3_6_3,
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};
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struct mipi_csis_info {
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enum mipi_csis_version version;
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unsigned int num_clocks;
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};
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struct mipi_csis_device {
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struct device *dev;
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void __iomem *regs;
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struct clk_bulk_data *clks;
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struct reset_control *mrst;
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struct regulator *mipi_phy_regulator;
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const struct mipi_csis_info *info;
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struct v4l2_subdev sd;
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struct media_pad pads[CSIS_PADS_NUM];
|
|
struct v4l2_async_notifier notifier;
|
|
struct v4l2_subdev *src_sd;
|
|
|
|
struct v4l2_mbus_config_mipi_csi2 bus;
|
|
u32 clk_frequency;
|
|
u32 hs_settle;
|
|
u32 clk_settle;
|
|
|
|
struct mutex lock; /* Protect csis_fmt and format_mbus */
|
|
const struct csis_pix_format *csis_fmt;
|
|
struct v4l2_mbus_framefmt format_mbus[CSIS_PADS_NUM];
|
|
|
|
spinlock_t slock; /* Protect events */
|
|
struct mipi_csis_event events[MIPI_CSIS_NUM_EVENTS];
|
|
struct dentry *debugfs_root;
|
|
struct {
|
|
bool enable;
|
|
u32 hs_settle;
|
|
u32 clk_settle;
|
|
} debug;
|
|
};
|
|
|
|
/* -----------------------------------------------------------------------------
|
|
* Format helpers
|
|
*/
|
|
|
|
struct csis_pix_format {
|
|
u32 code;
|
|
u32 output;
|
|
u32 data_type;
|
|
u8 width;
|
|
};
|
|
|
|
static const struct csis_pix_format mipi_csis_formats[] = {
|
|
/* YUV formats. */
|
|
{
|
|
.code = MEDIA_BUS_FMT_UYVY8_1X16,
|
|
.output = MEDIA_BUS_FMT_UYVY8_1X16,
|
|
.data_type = MIPI_CSI2_DATA_TYPE_YUV422_8,
|
|
.width = 16,
|
|
},
|
|
/* RGB formats. */
|
|
{
|
|
.code = MEDIA_BUS_FMT_RGB565_1X16,
|
|
.output = MEDIA_BUS_FMT_RGB565_1X16,
|
|
.data_type = MIPI_CSI2_DATA_TYPE_RGB565,
|
|
.width = 16,
|
|
}, {
|
|
.code = MEDIA_BUS_FMT_BGR888_1X24,
|
|
.output = MEDIA_BUS_FMT_RGB888_1X24,
|
|
.data_type = MIPI_CSI2_DATA_TYPE_RGB888,
|
|
.width = 24,
|
|
},
|
|
/* RAW (Bayer and greyscale) formats. */
|
|
{
|
|
.code = MEDIA_BUS_FMT_SBGGR8_1X8,
|
|
.output = MEDIA_BUS_FMT_SBGGR8_1X8,
|
|
.data_type = MIPI_CSI2_DATA_TYPE_RAW8,
|
|
.width = 8,
|
|
}, {
|
|
.code = MEDIA_BUS_FMT_SGBRG8_1X8,
|
|
.output = MEDIA_BUS_FMT_SGBRG8_1X8,
|
|
.data_type = MIPI_CSI2_DATA_TYPE_RAW8,
|
|
.width = 8,
|
|
}, {
|
|
.code = MEDIA_BUS_FMT_SGRBG8_1X8,
|
|
.output = MEDIA_BUS_FMT_SGRBG8_1X8,
|
|
.data_type = MIPI_CSI2_DATA_TYPE_RAW8,
|
|
.width = 8,
|
|
}, {
|
|
.code = MEDIA_BUS_FMT_SRGGB8_1X8,
|
|
.output = MEDIA_BUS_FMT_SRGGB8_1X8,
|
|
.data_type = MIPI_CSI2_DATA_TYPE_RAW8,
|
|
.width = 8,
|
|
}, {
|
|
.code = MEDIA_BUS_FMT_Y8_1X8,
|
|
.output = MEDIA_BUS_FMT_Y8_1X8,
|
|
.data_type = MIPI_CSI2_DATA_TYPE_RAW8,
|
|
.width = 8,
|
|
}, {
|
|
.code = MEDIA_BUS_FMT_SBGGR10_1X10,
|
|
.output = MEDIA_BUS_FMT_SBGGR10_1X10,
|
|
.data_type = MIPI_CSI2_DATA_TYPE_RAW10,
|
|
.width = 10,
|
|
}, {
|
|
.code = MEDIA_BUS_FMT_SGBRG10_1X10,
|
|
.output = MEDIA_BUS_FMT_SGBRG10_1X10,
|
|
.data_type = MIPI_CSI2_DATA_TYPE_RAW10,
|
|
.width = 10,
|
|
}, {
|
|
.code = MEDIA_BUS_FMT_SGRBG10_1X10,
|
|
.output = MEDIA_BUS_FMT_SGRBG10_1X10,
|
|
.data_type = MIPI_CSI2_DATA_TYPE_RAW10,
|
|
.width = 10,
|
|
}, {
|
|
.code = MEDIA_BUS_FMT_SRGGB10_1X10,
|
|
.output = MEDIA_BUS_FMT_SRGGB10_1X10,
|
|
.data_type = MIPI_CSI2_DATA_TYPE_RAW10,
|
|
.width = 10,
|
|
}, {
|
|
.code = MEDIA_BUS_FMT_Y10_1X10,
|
|
.output = MEDIA_BUS_FMT_Y10_1X10,
|
|
.data_type = MIPI_CSI2_DATA_TYPE_RAW10,
|
|
.width = 10,
|
|
}, {
|
|
.code = MEDIA_BUS_FMT_SBGGR12_1X12,
|
|
.output = MEDIA_BUS_FMT_SBGGR12_1X12,
|
|
.data_type = MIPI_CSI2_DATA_TYPE_RAW12,
|
|
.width = 12,
|
|
}, {
|
|
.code = MEDIA_BUS_FMT_SGBRG12_1X12,
|
|
.output = MEDIA_BUS_FMT_SGBRG12_1X12,
|
|
.data_type = MIPI_CSI2_DATA_TYPE_RAW12,
|
|
.width = 12,
|
|
}, {
|
|
.code = MEDIA_BUS_FMT_SGRBG12_1X12,
|
|
.output = MEDIA_BUS_FMT_SGRBG12_1X12,
|
|
.data_type = MIPI_CSI2_DATA_TYPE_RAW12,
|
|
.width = 12,
|
|
}, {
|
|
.code = MEDIA_BUS_FMT_SRGGB12_1X12,
|
|
.output = MEDIA_BUS_FMT_SRGGB12_1X12,
|
|
.data_type = MIPI_CSI2_DATA_TYPE_RAW12,
|
|
.width = 12,
|
|
}, {
|
|
.code = MEDIA_BUS_FMT_Y12_1X12,
|
|
.output = MEDIA_BUS_FMT_Y12_1X12,
|
|
.data_type = MIPI_CSI2_DATA_TYPE_RAW12,
|
|
.width = 12,
|
|
}, {
|
|
.code = MEDIA_BUS_FMT_SBGGR14_1X14,
|
|
.output = MEDIA_BUS_FMT_SBGGR14_1X14,
|
|
.data_type = MIPI_CSI2_DATA_TYPE_RAW14,
|
|
.width = 14,
|
|
}, {
|
|
.code = MEDIA_BUS_FMT_SGBRG14_1X14,
|
|
.output = MEDIA_BUS_FMT_SGBRG14_1X14,
|
|
.data_type = MIPI_CSI2_DATA_TYPE_RAW14,
|
|
.width = 14,
|
|
}, {
|
|
.code = MEDIA_BUS_FMT_SGRBG14_1X14,
|
|
.output = MEDIA_BUS_FMT_SGRBG14_1X14,
|
|
.data_type = MIPI_CSI2_DATA_TYPE_RAW14,
|
|
.width = 14,
|
|
}, {
|
|
.code = MEDIA_BUS_FMT_SRGGB14_1X14,
|
|
.output = MEDIA_BUS_FMT_SRGGB14_1X14,
|
|
.data_type = MIPI_CSI2_DATA_TYPE_RAW14,
|
|
.width = 14,
|
|
},
|
|
/* JPEG */
|
|
{
|
|
.code = MEDIA_BUS_FMT_JPEG_1X8,
|
|
.output = MEDIA_BUS_FMT_JPEG_1X8,
|
|
/*
|
|
* Map JPEG_1X8 to the RAW8 datatype.
|
|
*
|
|
* The CSI-2 specification suggests in Annex A "JPEG8 Data
|
|
* Format (informative)" to transmit JPEG data using one of the
|
|
* Data Types aimed to represent arbitrary data, such as the
|
|
* "User Defined Data Type 1" (0x30).
|
|
*
|
|
* However, when configured with a User Defined Data Type, the
|
|
* CSIS outputs data in quad pixel mode regardless of the mode
|
|
* selected in the MIPI_CSIS_ISP_CONFIG_CH register. Neither of
|
|
* the IP cores connected to the CSIS in i.MX SoCs (CSI bridge
|
|
* or ISI) support quad pixel mode, so this will never work in
|
|
* practice.
|
|
*
|
|
* Some sensors (such as the OV5640) send JPEG data using the
|
|
* RAW8 data type. This is usable and works, so map the JPEG
|
|
* format to RAW8. If the CSIS ends up being integrated in an
|
|
* SoC that can support quad pixel mode, this will have to be
|
|
* revisited.
|
|
*/
|
|
.data_type = MIPI_CSI2_DATA_TYPE_RAW8,
|
|
.width = 8,
|
|
}
|
|
};
|
|
|
|
static const struct csis_pix_format *find_csis_format(u32 code)
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(mipi_csis_formats); i++)
|
|
if (code == mipi_csis_formats[i].code)
|
|
return &mipi_csis_formats[i];
|
|
return NULL;
|
|
}
|
|
|
|
/* -----------------------------------------------------------------------------
|
|
* Hardware configuration
|
|
*/
|
|
|
|
static inline u32 mipi_csis_read(struct mipi_csis_device *csis, u32 reg)
|
|
{
|
|
return readl(csis->regs + reg);
|
|
}
|
|
|
|
static inline void mipi_csis_write(struct mipi_csis_device *csis, u32 reg,
|
|
u32 val)
|
|
{
|
|
writel(val, csis->regs + reg);
|
|
}
|
|
|
|
static void mipi_csis_enable_interrupts(struct mipi_csis_device *csis, bool on)
|
|
{
|
|
mipi_csis_write(csis, MIPI_CSIS_INT_MSK, on ? 0xffffffff : 0);
|
|
mipi_csis_write(csis, MIPI_CSIS_DBG_INTR_MSK, on ? 0xffffffff : 0);
|
|
}
|
|
|
|
static void mipi_csis_sw_reset(struct mipi_csis_device *csis)
|
|
{
|
|
u32 val = mipi_csis_read(csis, MIPI_CSIS_CMN_CTRL);
|
|
|
|
mipi_csis_write(csis, MIPI_CSIS_CMN_CTRL,
|
|
val | MIPI_CSIS_CMN_CTRL_RESET);
|
|
usleep_range(10, 20);
|
|
}
|
|
|
|
static void mipi_csis_system_enable(struct mipi_csis_device *csis, int on)
|
|
{
|
|
u32 val, mask;
|
|
|
|
val = mipi_csis_read(csis, MIPI_CSIS_CMN_CTRL);
|
|
if (on)
|
|
val |= MIPI_CSIS_CMN_CTRL_ENABLE;
|
|
else
|
|
val &= ~MIPI_CSIS_CMN_CTRL_ENABLE;
|
|
mipi_csis_write(csis, MIPI_CSIS_CMN_CTRL, val);
|
|
|
|
val = mipi_csis_read(csis, MIPI_CSIS_DPHY_CMN_CTRL);
|
|
val &= ~MIPI_CSIS_DPHY_CMN_CTRL_ENABLE;
|
|
if (on) {
|
|
mask = (1 << (csis->bus.num_data_lanes + 1)) - 1;
|
|
val |= (mask & MIPI_CSIS_DPHY_CMN_CTRL_ENABLE);
|
|
}
|
|
mipi_csis_write(csis, MIPI_CSIS_DPHY_CMN_CTRL, val);
|
|
}
|
|
|
|
/* Called with the csis.lock mutex held */
|
|
static void __mipi_csis_set_format(struct mipi_csis_device *csis)
|
|
{
|
|
struct v4l2_mbus_framefmt *mf = &csis->format_mbus[CSIS_PAD_SINK];
|
|
u32 val;
|
|
|
|
/* Color format */
|
|
val = mipi_csis_read(csis, MIPI_CSIS_ISP_CONFIG_CH(0));
|
|
val &= ~(MIPI_CSIS_ISPCFG_ALIGN_32BIT | MIPI_CSIS_ISPCFG_FMT_MASK
|
|
| MIPI_CSIS_ISPCFG_PIXEL_MASK);
|
|
|
|
/*
|
|
* YUV 4:2:2 can be transferred with 8 or 16 bits per clock sample
|
|
* (referred to in the documentation as single and dual pixel modes
|
|
* respectively, although the 8-bit mode transfers half a pixel per
|
|
* clock sample and the 16-bit mode one pixel). While both mode work
|
|
* when the CSIS is connected to a receiver that supports either option,
|
|
* single pixel mode requires clock rates twice as high. As all SoCs
|
|
* that integrate the CSIS can operate in 16-bit bit mode, and some do
|
|
* not support 8-bit mode (this is the case of the i.MX8MP), use dual
|
|
* pixel mode unconditionally.
|
|
*
|
|
* TODO: Verify which other formats require DUAL (or QUAD) modes.
|
|
*/
|
|
if (csis->csis_fmt->data_type == MIPI_CSI2_DATA_TYPE_YUV422_8)
|
|
val |= MIPI_CSIS_ISPCFG_PIXEL_MODE_DUAL;
|
|
|
|
val |= MIPI_CSIS_ISPCFG_FMT(csis->csis_fmt->data_type);
|
|
mipi_csis_write(csis, MIPI_CSIS_ISP_CONFIG_CH(0), val);
|
|
|
|
/* Pixel resolution */
|
|
val = mf->width | (mf->height << 16);
|
|
mipi_csis_write(csis, MIPI_CSIS_ISP_RESOL_CH(0), val);
|
|
}
|
|
|
|
static int mipi_csis_calculate_params(struct mipi_csis_device *csis)
|
|
{
|
|
s64 link_freq;
|
|
u32 lane_rate;
|
|
|
|
/* Calculate the line rate from the pixel rate. */
|
|
link_freq = v4l2_get_link_freq(csis->src_sd->ctrl_handler,
|
|
csis->csis_fmt->width,
|
|
csis->bus.num_data_lanes * 2);
|
|
if (link_freq < 0) {
|
|
dev_err(csis->dev, "Unable to obtain link frequency: %d\n",
|
|
(int)link_freq);
|
|
return link_freq;
|
|
}
|
|
|
|
lane_rate = link_freq * 2;
|
|
|
|
if (lane_rate < 80000000 || lane_rate > 1500000000) {
|
|
dev_dbg(csis->dev, "Out-of-bound lane rate %u\n", lane_rate);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* The HSSETTLE counter value is document in a table, but can also
|
|
* easily be calculated. Hardcode the CLKSETTLE value to 0 for now
|
|
* (which is documented as corresponding to CSI-2 v0.87 to v1.00) until
|
|
* we figure out how to compute it correctly.
|
|
*/
|
|
csis->hs_settle = (lane_rate - 5000000) / 45000000;
|
|
csis->clk_settle = 0;
|
|
|
|
dev_dbg(csis->dev, "lane rate %u, Tclk_settle %u, Ths_settle %u\n",
|
|
lane_rate, csis->clk_settle, csis->hs_settle);
|
|
|
|
if (csis->debug.hs_settle < 0xff) {
|
|
dev_dbg(csis->dev, "overriding Ths_settle with %u\n",
|
|
csis->debug.hs_settle);
|
|
csis->hs_settle = csis->debug.hs_settle;
|
|
}
|
|
|
|
if (csis->debug.clk_settle < 4) {
|
|
dev_dbg(csis->dev, "overriding Tclk_settle with %u\n",
|
|
csis->debug.clk_settle);
|
|
csis->clk_settle = csis->debug.clk_settle;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void mipi_csis_set_params(struct mipi_csis_device *csis)
|
|
{
|
|
int lanes = csis->bus.num_data_lanes;
|
|
u32 val;
|
|
|
|
val = mipi_csis_read(csis, MIPI_CSIS_CMN_CTRL);
|
|
val &= ~MIPI_CSIS_CMN_CTRL_LANE_NR_MASK;
|
|
val |= (lanes - 1) << MIPI_CSIS_CMN_CTRL_LANE_NR_OFFSET;
|
|
if (csis->info->version == MIPI_CSIS_V3_3)
|
|
val |= MIPI_CSIS_CMN_CTRL_INTER_MODE;
|
|
mipi_csis_write(csis, MIPI_CSIS_CMN_CTRL, val);
|
|
|
|
__mipi_csis_set_format(csis);
|
|
|
|
mipi_csis_write(csis, MIPI_CSIS_DPHY_CMN_CTRL,
|
|
MIPI_CSIS_DPHY_CMN_CTRL_HSSETTLE(csis->hs_settle) |
|
|
MIPI_CSIS_DPHY_CMN_CTRL_CLKSETTLE(csis->clk_settle));
|
|
|
|
val = (0 << MIPI_CSIS_ISP_SYNC_HSYNC_LINTV_OFFSET)
|
|
| (0 << MIPI_CSIS_ISP_SYNC_VSYNC_SINTV_OFFSET)
|
|
| (0 << MIPI_CSIS_ISP_SYNC_VSYNC_EINTV_OFFSET);
|
|
mipi_csis_write(csis, MIPI_CSIS_ISP_SYNC_CH(0), val);
|
|
|
|
val = mipi_csis_read(csis, MIPI_CSIS_CLK_CTRL);
|
|
val |= MIPI_CSIS_CLK_CTRL_WCLK_SRC;
|
|
val |= MIPI_CSIS_CLK_CTRL_CLKGATE_TRAIL_CH0(15);
|
|
val &= ~MIPI_CSIS_CLK_CTRL_CLKGATE_EN_MSK;
|
|
mipi_csis_write(csis, MIPI_CSIS_CLK_CTRL, val);
|
|
|
|
mipi_csis_write(csis, MIPI_CSIS_DPHY_BCTRL_L,
|
|
MIPI_CSIS_DPHY_BCTRL_L_BIAS_REF_VOLT_715MV |
|
|
MIPI_CSIS_DPHY_BCTRL_L_BGR_CHOPPER_FREQ_3MHZ |
|
|
MIPI_CSIS_DPHY_BCTRL_L_REG_12P_LVL_CTL_1_2V |
|
|
MIPI_CSIS_DPHY_BCTRL_L_LP_RX_HYS_LVL_80MV |
|
|
MIPI_CSIS_DPHY_BCTRL_L_LP_RX_VREF_LVL_715MV |
|
|
MIPI_CSIS_DPHY_BCTRL_L_LP_CD_HYS_60MV |
|
|
MIPI_CSIS_DPHY_BCTRL_L_B_DPHYCTRL(20000000));
|
|
mipi_csis_write(csis, MIPI_CSIS_DPHY_BCTRL_H, 0);
|
|
|
|
/* Update the shadow register. */
|
|
val = mipi_csis_read(csis, MIPI_CSIS_CMN_CTRL);
|
|
mipi_csis_write(csis, MIPI_CSIS_CMN_CTRL,
|
|
val | MIPI_CSIS_CMN_CTRL_UPDATE_SHADOW |
|
|
MIPI_CSIS_CMN_CTRL_UPDATE_SHADOW_CTRL);
|
|
}
|
|
|
|
static int mipi_csis_clk_enable(struct mipi_csis_device *csis)
|
|
{
|
|
return clk_bulk_prepare_enable(csis->info->num_clocks, csis->clks);
|
|
}
|
|
|
|
static void mipi_csis_clk_disable(struct mipi_csis_device *csis)
|
|
{
|
|
clk_bulk_disable_unprepare(csis->info->num_clocks, csis->clks);
|
|
}
|
|
|
|
static int mipi_csis_clk_get(struct mipi_csis_device *csis)
|
|
{
|
|
unsigned int i;
|
|
int ret;
|
|
|
|
csis->clks = devm_kcalloc(csis->dev, csis->info->num_clocks,
|
|
sizeof(*csis->clks), GFP_KERNEL);
|
|
|
|
if (!csis->clks)
|
|
return -ENOMEM;
|
|
|
|
for (i = 0; i < csis->info->num_clocks; i++)
|
|
csis->clks[i].id = mipi_csis_clk_id[i];
|
|
|
|
ret = devm_clk_bulk_get(csis->dev, csis->info->num_clocks,
|
|
csis->clks);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/* Set clock rate */
|
|
ret = clk_set_rate(csis->clks[MIPI_CSIS_CLK_WRAP].clk,
|
|
csis->clk_frequency);
|
|
if (ret < 0)
|
|
dev_err(csis->dev, "set rate=%d failed: %d\n",
|
|
csis->clk_frequency, ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void mipi_csis_start_stream(struct mipi_csis_device *csis)
|
|
{
|
|
mipi_csis_sw_reset(csis);
|
|
mipi_csis_set_params(csis);
|
|
mipi_csis_system_enable(csis, true);
|
|
mipi_csis_enable_interrupts(csis, true);
|
|
}
|
|
|
|
static void mipi_csis_stop_stream(struct mipi_csis_device *csis)
|
|
{
|
|
mipi_csis_enable_interrupts(csis, false);
|
|
mipi_csis_system_enable(csis, false);
|
|
}
|
|
|
|
static irqreturn_t mipi_csis_irq_handler(int irq, void *dev_id)
|
|
{
|
|
struct mipi_csis_device *csis = dev_id;
|
|
unsigned long flags;
|
|
unsigned int i;
|
|
u32 status;
|
|
u32 dbg_status;
|
|
|
|
status = mipi_csis_read(csis, MIPI_CSIS_INT_SRC);
|
|
dbg_status = mipi_csis_read(csis, MIPI_CSIS_DBG_INTR_SRC);
|
|
|
|
spin_lock_irqsave(&csis->slock, flags);
|
|
|
|
/* Update the event/error counters */
|
|
if ((status & MIPI_CSIS_INT_SRC_ERRORS) || csis->debug.enable) {
|
|
for (i = 0; i < MIPI_CSIS_NUM_EVENTS; i++) {
|
|
struct mipi_csis_event *event = &csis->events[i];
|
|
|
|
if ((!event->debug && (status & event->mask)) ||
|
|
(event->debug && (dbg_status & event->mask)))
|
|
event->counter++;
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&csis->slock, flags);
|
|
|
|
mipi_csis_write(csis, MIPI_CSIS_INT_SRC, status);
|
|
mipi_csis_write(csis, MIPI_CSIS_DBG_INTR_SRC, dbg_status);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/* -----------------------------------------------------------------------------
|
|
* PHY regulator and reset
|
|
*/
|
|
|
|
static int mipi_csis_phy_enable(struct mipi_csis_device *csis)
|
|
{
|
|
if (csis->info->version != MIPI_CSIS_V3_3)
|
|
return 0;
|
|
|
|
return regulator_enable(csis->mipi_phy_regulator);
|
|
}
|
|
|
|
static int mipi_csis_phy_disable(struct mipi_csis_device *csis)
|
|
{
|
|
if (csis->info->version != MIPI_CSIS_V3_3)
|
|
return 0;
|
|
|
|
return regulator_disable(csis->mipi_phy_regulator);
|
|
}
|
|
|
|
static void mipi_csis_phy_reset(struct mipi_csis_device *csis)
|
|
{
|
|
if (csis->info->version != MIPI_CSIS_V3_3)
|
|
return;
|
|
|
|
reset_control_assert(csis->mrst);
|
|
msleep(20);
|
|
reset_control_deassert(csis->mrst);
|
|
}
|
|
|
|
static int mipi_csis_phy_init(struct mipi_csis_device *csis)
|
|
{
|
|
if (csis->info->version != MIPI_CSIS_V3_3)
|
|
return 0;
|
|
|
|
/* Get MIPI PHY reset and regulator. */
|
|
csis->mrst = devm_reset_control_get_exclusive(csis->dev, NULL);
|
|
if (IS_ERR(csis->mrst))
|
|
return PTR_ERR(csis->mrst);
|
|
|
|
csis->mipi_phy_regulator = devm_regulator_get(csis->dev, "phy");
|
|
if (IS_ERR(csis->mipi_phy_regulator))
|
|
return PTR_ERR(csis->mipi_phy_regulator);
|
|
|
|
return regulator_set_voltage(csis->mipi_phy_regulator, 1000000,
|
|
1000000);
|
|
}
|
|
|
|
/* -----------------------------------------------------------------------------
|
|
* Debug
|
|
*/
|
|
|
|
static void mipi_csis_clear_counters(struct mipi_csis_device *csis)
|
|
{
|
|
unsigned long flags;
|
|
unsigned int i;
|
|
|
|
spin_lock_irqsave(&csis->slock, flags);
|
|
for (i = 0; i < MIPI_CSIS_NUM_EVENTS; i++)
|
|
csis->events[i].counter = 0;
|
|
spin_unlock_irqrestore(&csis->slock, flags);
|
|
}
|
|
|
|
static void mipi_csis_log_counters(struct mipi_csis_device *csis, bool non_errors)
|
|
{
|
|
unsigned int num_events = non_errors ? MIPI_CSIS_NUM_EVENTS
|
|
: MIPI_CSIS_NUM_EVENTS - 8;
|
|
unsigned long flags;
|
|
unsigned int i;
|
|
|
|
spin_lock_irqsave(&csis->slock, flags);
|
|
|
|
for (i = 0; i < num_events; ++i) {
|
|
if (csis->events[i].counter > 0 || csis->debug.enable)
|
|
dev_info(csis->dev, "%s events: %d\n",
|
|
csis->events[i].name,
|
|
csis->events[i].counter);
|
|
}
|
|
spin_unlock_irqrestore(&csis->slock, flags);
|
|
}
|
|
|
|
static int mipi_csis_dump_regs(struct mipi_csis_device *csis)
|
|
{
|
|
static const struct {
|
|
u32 offset;
|
|
const char * const name;
|
|
} registers[] = {
|
|
{ MIPI_CSIS_CMN_CTRL, "CMN_CTRL" },
|
|
{ MIPI_CSIS_CLK_CTRL, "CLK_CTRL" },
|
|
{ MIPI_CSIS_INT_MSK, "INT_MSK" },
|
|
{ MIPI_CSIS_DPHY_STATUS, "DPHY_STATUS" },
|
|
{ MIPI_CSIS_DPHY_CMN_CTRL, "DPHY_CMN_CTRL" },
|
|
{ MIPI_CSIS_DPHY_SCTRL_L, "DPHY_SCTRL_L" },
|
|
{ MIPI_CSIS_DPHY_SCTRL_H, "DPHY_SCTRL_H" },
|
|
{ MIPI_CSIS_ISP_CONFIG_CH(0), "ISP_CONFIG_CH0" },
|
|
{ MIPI_CSIS_ISP_RESOL_CH(0), "ISP_RESOL_CH0" },
|
|
{ MIPI_CSIS_SDW_CONFIG_CH(0), "SDW_CONFIG_CH0" },
|
|
{ MIPI_CSIS_SDW_RESOL_CH(0), "SDW_RESOL_CH0" },
|
|
{ MIPI_CSIS_DBG_CTRL, "DBG_CTRL" },
|
|
{ MIPI_CSIS_FRAME_COUNTER_CH(0), "FRAME_COUNTER_CH0" },
|
|
};
|
|
|
|
unsigned int i;
|
|
u32 cfg;
|
|
|
|
if (!pm_runtime_get_if_in_use(csis->dev))
|
|
return 0;
|
|
|
|
dev_info(csis->dev, "--- REGISTERS ---\n");
|
|
|
|
for (i = 0; i < ARRAY_SIZE(registers); i++) {
|
|
cfg = mipi_csis_read(csis, registers[i].offset);
|
|
dev_info(csis->dev, "%14s: 0x%08x\n", registers[i].name, cfg);
|
|
}
|
|
|
|
pm_runtime_put(csis->dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mipi_csis_dump_regs_show(struct seq_file *m, void *private)
|
|
{
|
|
struct mipi_csis_device *csis = m->private;
|
|
|
|
return mipi_csis_dump_regs(csis);
|
|
}
|
|
DEFINE_SHOW_ATTRIBUTE(mipi_csis_dump_regs);
|
|
|
|
static void mipi_csis_debugfs_init(struct mipi_csis_device *csis)
|
|
{
|
|
csis->debug.hs_settle = UINT_MAX;
|
|
csis->debug.clk_settle = UINT_MAX;
|
|
|
|
csis->debugfs_root = debugfs_create_dir(dev_name(csis->dev), NULL);
|
|
|
|
debugfs_create_bool("debug_enable", 0600, csis->debugfs_root,
|
|
&csis->debug.enable);
|
|
debugfs_create_file("dump_regs", 0600, csis->debugfs_root, csis,
|
|
&mipi_csis_dump_regs_fops);
|
|
debugfs_create_u32("tclk_settle", 0600, csis->debugfs_root,
|
|
&csis->debug.clk_settle);
|
|
debugfs_create_u32("ths_settle", 0600, csis->debugfs_root,
|
|
&csis->debug.hs_settle);
|
|
}
|
|
|
|
static void mipi_csis_debugfs_exit(struct mipi_csis_device *csis)
|
|
{
|
|
debugfs_remove_recursive(csis->debugfs_root);
|
|
}
|
|
|
|
/* -----------------------------------------------------------------------------
|
|
* V4L2 subdev operations
|
|
*/
|
|
|
|
static struct mipi_csis_device *sd_to_mipi_csis_device(struct v4l2_subdev *sdev)
|
|
{
|
|
return container_of(sdev, struct mipi_csis_device, sd);
|
|
}
|
|
|
|
static int mipi_csis_s_stream(struct v4l2_subdev *sd, int enable)
|
|
{
|
|
struct mipi_csis_device *csis = sd_to_mipi_csis_device(sd);
|
|
int ret;
|
|
|
|
if (!enable) {
|
|
mutex_lock(&csis->lock);
|
|
|
|
v4l2_subdev_call(csis->src_sd, video, s_stream, 0);
|
|
|
|
mipi_csis_stop_stream(csis);
|
|
if (csis->debug.enable)
|
|
mipi_csis_log_counters(csis, true);
|
|
|
|
mutex_unlock(&csis->lock);
|
|
|
|
pm_runtime_put(csis->dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
ret = mipi_csis_calculate_params(csis);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
mipi_csis_clear_counters(csis);
|
|
|
|
ret = pm_runtime_resume_and_get(csis->dev);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
mutex_lock(&csis->lock);
|
|
|
|
mipi_csis_start_stream(csis);
|
|
ret = v4l2_subdev_call(csis->src_sd, video, s_stream, 1);
|
|
if (ret < 0)
|
|
goto error;
|
|
|
|
mipi_csis_log_counters(csis, true);
|
|
|
|
mutex_unlock(&csis->lock);
|
|
|
|
return 0;
|
|
|
|
error:
|
|
mipi_csis_stop_stream(csis);
|
|
mutex_unlock(&csis->lock);
|
|
pm_runtime_put(csis->dev);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct v4l2_mbus_framefmt *
|
|
mipi_csis_get_format(struct mipi_csis_device *csis,
|
|
struct v4l2_subdev_state *sd_state,
|
|
enum v4l2_subdev_format_whence which,
|
|
unsigned int pad)
|
|
{
|
|
if (which == V4L2_SUBDEV_FORMAT_TRY)
|
|
return v4l2_subdev_get_try_format(&csis->sd, sd_state, pad);
|
|
|
|
return &csis->format_mbus[pad];
|
|
}
|
|
|
|
static int mipi_csis_init_cfg(struct v4l2_subdev *sd,
|
|
struct v4l2_subdev_state *sd_state)
|
|
{
|
|
struct mipi_csis_device *csis = sd_to_mipi_csis_device(sd);
|
|
struct v4l2_mbus_framefmt *fmt_sink;
|
|
struct v4l2_mbus_framefmt *fmt_source;
|
|
enum v4l2_subdev_format_whence which;
|
|
|
|
which = sd_state ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
|
|
fmt_sink = mipi_csis_get_format(csis, sd_state, which, CSIS_PAD_SINK);
|
|
|
|
fmt_sink->code = MEDIA_BUS_FMT_UYVY8_1X16;
|
|
fmt_sink->width = MIPI_CSIS_DEF_PIX_WIDTH;
|
|
fmt_sink->height = MIPI_CSIS_DEF_PIX_HEIGHT;
|
|
fmt_sink->field = V4L2_FIELD_NONE;
|
|
|
|
fmt_sink->colorspace = V4L2_COLORSPACE_SMPTE170M;
|
|
fmt_sink->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(fmt_sink->colorspace);
|
|
fmt_sink->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(fmt_sink->colorspace);
|
|
fmt_sink->quantization =
|
|
V4L2_MAP_QUANTIZATION_DEFAULT(false, fmt_sink->colorspace,
|
|
fmt_sink->ycbcr_enc);
|
|
|
|
fmt_source = mipi_csis_get_format(csis, sd_state, which,
|
|
CSIS_PAD_SOURCE);
|
|
*fmt_source = *fmt_sink;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mipi_csis_get_fmt(struct v4l2_subdev *sd,
|
|
struct v4l2_subdev_state *sd_state,
|
|
struct v4l2_subdev_format *sdformat)
|
|
{
|
|
struct mipi_csis_device *csis = sd_to_mipi_csis_device(sd);
|
|
struct v4l2_mbus_framefmt *fmt;
|
|
|
|
fmt = mipi_csis_get_format(csis, sd_state, sdformat->which,
|
|
sdformat->pad);
|
|
|
|
mutex_lock(&csis->lock);
|
|
sdformat->format = *fmt;
|
|
mutex_unlock(&csis->lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mipi_csis_enum_mbus_code(struct v4l2_subdev *sd,
|
|
struct v4l2_subdev_state *sd_state,
|
|
struct v4l2_subdev_mbus_code_enum *code)
|
|
{
|
|
struct mipi_csis_device *csis = sd_to_mipi_csis_device(sd);
|
|
|
|
/*
|
|
* The CSIS can't transcode in any way, the source format is identical
|
|
* to the sink format.
|
|
*/
|
|
if (code->pad == CSIS_PAD_SOURCE) {
|
|
struct v4l2_mbus_framefmt *fmt;
|
|
|
|
if (code->index > 0)
|
|
return -EINVAL;
|
|
|
|
fmt = mipi_csis_get_format(csis, sd_state, code->which,
|
|
code->pad);
|
|
code->code = fmt->code;
|
|
return 0;
|
|
}
|
|
|
|
if (code->pad != CSIS_PAD_SINK)
|
|
return -EINVAL;
|
|
|
|
if (code->index >= ARRAY_SIZE(mipi_csis_formats))
|
|
return -EINVAL;
|
|
|
|
code->code = mipi_csis_formats[code->index].code;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mipi_csis_set_fmt(struct v4l2_subdev *sd,
|
|
struct v4l2_subdev_state *sd_state,
|
|
struct v4l2_subdev_format *sdformat)
|
|
{
|
|
struct mipi_csis_device *csis = sd_to_mipi_csis_device(sd);
|
|
struct csis_pix_format const *csis_fmt;
|
|
struct v4l2_mbus_framefmt *fmt;
|
|
unsigned int align;
|
|
|
|
/*
|
|
* The CSIS can't transcode in any way, the source format can't be
|
|
* modified.
|
|
*/
|
|
if (sdformat->pad == CSIS_PAD_SOURCE)
|
|
return mipi_csis_get_fmt(sd, sd_state, sdformat);
|
|
|
|
if (sdformat->pad != CSIS_PAD_SINK)
|
|
return -EINVAL;
|
|
|
|
/*
|
|
* Validate the media bus code and clamp and align the size.
|
|
*
|
|
* The total number of bits per line must be a multiple of 8. We thus
|
|
* need to align the width for formats that are not multiples of 8
|
|
* bits.
|
|
*/
|
|
csis_fmt = find_csis_format(sdformat->format.code);
|
|
if (!csis_fmt)
|
|
csis_fmt = &mipi_csis_formats[0];
|
|
|
|
switch (csis_fmt->width % 8) {
|
|
case 0:
|
|
align = 0;
|
|
break;
|
|
case 4:
|
|
align = 1;
|
|
break;
|
|
case 2:
|
|
case 6:
|
|
align = 2;
|
|
break;
|
|
default:
|
|
/* 1, 3, 5, 7 */
|
|
align = 3;
|
|
break;
|
|
}
|
|
|
|
v4l_bound_align_image(&sdformat->format.width, 1,
|
|
CSIS_MAX_PIX_WIDTH, align,
|
|
&sdformat->format.height, 1,
|
|
CSIS_MAX_PIX_HEIGHT, 0, 0);
|
|
|
|
fmt = mipi_csis_get_format(csis, sd_state, sdformat->which,
|
|
sdformat->pad);
|
|
|
|
mutex_lock(&csis->lock);
|
|
|
|
fmt->code = csis_fmt->code;
|
|
fmt->width = sdformat->format.width;
|
|
fmt->height = sdformat->format.height;
|
|
fmt->colorspace = sdformat->format.colorspace;
|
|
fmt->quantization = sdformat->format.quantization;
|
|
fmt->xfer_func = sdformat->format.xfer_func;
|
|
fmt->ycbcr_enc = sdformat->format.ycbcr_enc;
|
|
|
|
sdformat->format = *fmt;
|
|
|
|
/* Propagate the format from sink to source. */
|
|
fmt = mipi_csis_get_format(csis, sd_state, sdformat->which,
|
|
CSIS_PAD_SOURCE);
|
|
*fmt = sdformat->format;
|
|
|
|
/* The format on the source pad might change due to unpacking. */
|
|
fmt->code = csis_fmt->output;
|
|
|
|
/* Store the CSIS format descriptor for active formats. */
|
|
if (sdformat->which == V4L2_SUBDEV_FORMAT_ACTIVE)
|
|
csis->csis_fmt = csis_fmt;
|
|
|
|
mutex_unlock(&csis->lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mipi_csis_get_frame_desc(struct v4l2_subdev *sd, unsigned int pad,
|
|
struct v4l2_mbus_frame_desc *fd)
|
|
{
|
|
struct mipi_csis_device *csis = sd_to_mipi_csis_device(sd);
|
|
struct v4l2_mbus_frame_desc_entry *entry = &fd->entry[0];
|
|
|
|
if (pad != CSIS_PAD_SOURCE)
|
|
return -EINVAL;
|
|
|
|
fd->type = V4L2_MBUS_FRAME_DESC_TYPE_PARALLEL;
|
|
fd->num_entries = 1;
|
|
|
|
memset(entry, 0, sizeof(*entry));
|
|
|
|
mutex_lock(&csis->lock);
|
|
|
|
entry->flags = 0;
|
|
entry->pixelcode = csis->csis_fmt->code;
|
|
entry->bus.csi2.vc = 0;
|
|
entry->bus.csi2.dt = csis->csis_fmt->data_type;
|
|
|
|
mutex_unlock(&csis->lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mipi_csis_log_status(struct v4l2_subdev *sd)
|
|
{
|
|
struct mipi_csis_device *csis = sd_to_mipi_csis_device(sd);
|
|
|
|
mipi_csis_log_counters(csis, true);
|
|
if (csis->debug.enable)
|
|
mipi_csis_dump_regs(csis);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct v4l2_subdev_core_ops mipi_csis_core_ops = {
|
|
.log_status = mipi_csis_log_status,
|
|
};
|
|
|
|
static const struct v4l2_subdev_video_ops mipi_csis_video_ops = {
|
|
.s_stream = mipi_csis_s_stream,
|
|
};
|
|
|
|
static const struct v4l2_subdev_pad_ops mipi_csis_pad_ops = {
|
|
.init_cfg = mipi_csis_init_cfg,
|
|
.enum_mbus_code = mipi_csis_enum_mbus_code,
|
|
.get_fmt = mipi_csis_get_fmt,
|
|
.set_fmt = mipi_csis_set_fmt,
|
|
.get_frame_desc = mipi_csis_get_frame_desc,
|
|
};
|
|
|
|
static const struct v4l2_subdev_ops mipi_csis_subdev_ops = {
|
|
.core = &mipi_csis_core_ops,
|
|
.video = &mipi_csis_video_ops,
|
|
.pad = &mipi_csis_pad_ops,
|
|
};
|
|
|
|
/* -----------------------------------------------------------------------------
|
|
* Media entity operations
|
|
*/
|
|
|
|
static int mipi_csis_link_setup(struct media_entity *entity,
|
|
const struct media_pad *local_pad,
|
|
const struct media_pad *remote_pad, u32 flags)
|
|
{
|
|
struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
|
|
struct mipi_csis_device *csis = sd_to_mipi_csis_device(sd);
|
|
struct v4l2_subdev *remote_sd;
|
|
|
|
dev_dbg(csis->dev, "link setup %s -> %s", remote_pad->entity->name,
|
|
local_pad->entity->name);
|
|
|
|
/* We only care about the link to the source. */
|
|
if (!(local_pad->flags & MEDIA_PAD_FL_SINK))
|
|
return 0;
|
|
|
|
remote_sd = media_entity_to_v4l2_subdev(remote_pad->entity);
|
|
|
|
if (flags & MEDIA_LNK_FL_ENABLED) {
|
|
if (csis->src_sd)
|
|
return -EBUSY;
|
|
|
|
csis->src_sd = remote_sd;
|
|
} else {
|
|
csis->src_sd = NULL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct media_entity_operations mipi_csis_entity_ops = {
|
|
.link_setup = mipi_csis_link_setup,
|
|
.link_validate = v4l2_subdev_link_validate,
|
|
.get_fwnode_pad = v4l2_subdev_get_fwnode_pad_1_to_1,
|
|
};
|
|
|
|
/* -----------------------------------------------------------------------------
|
|
* Async subdev notifier
|
|
*/
|
|
|
|
static struct mipi_csis_device *
|
|
mipi_notifier_to_csis_state(struct v4l2_async_notifier *n)
|
|
{
|
|
return container_of(n, struct mipi_csis_device, notifier);
|
|
}
|
|
|
|
static int mipi_csis_notify_bound(struct v4l2_async_notifier *notifier,
|
|
struct v4l2_subdev *sd,
|
|
struct v4l2_async_subdev *asd)
|
|
{
|
|
struct mipi_csis_device *csis = mipi_notifier_to_csis_state(notifier);
|
|
struct media_pad *sink = &csis->sd.entity.pads[CSIS_PAD_SINK];
|
|
|
|
return v4l2_create_fwnode_links_to_pad(sd, sink, 0);
|
|
}
|
|
|
|
static const struct v4l2_async_notifier_operations mipi_csis_notify_ops = {
|
|
.bound = mipi_csis_notify_bound,
|
|
};
|
|
|
|
static int mipi_csis_async_register(struct mipi_csis_device *csis)
|
|
{
|
|
struct v4l2_fwnode_endpoint vep = {
|
|
.bus_type = V4L2_MBUS_CSI2_DPHY,
|
|
};
|
|
struct v4l2_async_subdev *asd;
|
|
struct fwnode_handle *ep;
|
|
unsigned int i;
|
|
int ret;
|
|
|
|
v4l2_async_nf_init(&csis->notifier);
|
|
|
|
ep = fwnode_graph_get_endpoint_by_id(dev_fwnode(csis->dev), 0, 0,
|
|
FWNODE_GRAPH_ENDPOINT_NEXT);
|
|
if (!ep)
|
|
return -ENOTCONN;
|
|
|
|
ret = v4l2_fwnode_endpoint_parse(ep, &vep);
|
|
if (ret)
|
|
goto err_parse;
|
|
|
|
for (i = 0; i < vep.bus.mipi_csi2.num_data_lanes; ++i) {
|
|
if (vep.bus.mipi_csi2.data_lanes[i] != i + 1) {
|
|
dev_err(csis->dev,
|
|
"data lanes reordering is not supported");
|
|
ret = -EINVAL;
|
|
goto err_parse;
|
|
}
|
|
}
|
|
|
|
csis->bus = vep.bus.mipi_csi2;
|
|
|
|
dev_dbg(csis->dev, "data lanes: %d\n", csis->bus.num_data_lanes);
|
|
dev_dbg(csis->dev, "flags: 0x%08x\n", csis->bus.flags);
|
|
|
|
asd = v4l2_async_nf_add_fwnode_remote(&csis->notifier, ep,
|
|
struct v4l2_async_subdev);
|
|
if (IS_ERR(asd)) {
|
|
ret = PTR_ERR(asd);
|
|
goto err_parse;
|
|
}
|
|
|
|
fwnode_handle_put(ep);
|
|
|
|
csis->notifier.ops = &mipi_csis_notify_ops;
|
|
|
|
ret = v4l2_async_subdev_nf_register(&csis->sd, &csis->notifier);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return v4l2_async_register_subdev(&csis->sd);
|
|
|
|
err_parse:
|
|
fwnode_handle_put(ep);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* -----------------------------------------------------------------------------
|
|
* Suspend/resume
|
|
*/
|
|
|
|
static int __maybe_unused mipi_csis_runtime_suspend(struct device *dev)
|
|
{
|
|
struct v4l2_subdev *sd = dev_get_drvdata(dev);
|
|
struct mipi_csis_device *csis = sd_to_mipi_csis_device(sd);
|
|
int ret = 0;
|
|
|
|
mutex_lock(&csis->lock);
|
|
|
|
ret = mipi_csis_phy_disable(csis);
|
|
if (ret)
|
|
goto unlock;
|
|
|
|
mipi_csis_clk_disable(csis);
|
|
|
|
unlock:
|
|
mutex_unlock(&csis->lock);
|
|
|
|
return ret ? -EAGAIN : 0;
|
|
}
|
|
|
|
static int __maybe_unused mipi_csis_runtime_resume(struct device *dev)
|
|
{
|
|
struct v4l2_subdev *sd = dev_get_drvdata(dev);
|
|
struct mipi_csis_device *csis = sd_to_mipi_csis_device(sd);
|
|
int ret = 0;
|
|
|
|
mutex_lock(&csis->lock);
|
|
|
|
ret = mipi_csis_phy_enable(csis);
|
|
if (ret)
|
|
goto unlock;
|
|
|
|
mipi_csis_clk_enable(csis);
|
|
|
|
unlock:
|
|
mutex_unlock(&csis->lock);
|
|
|
|
return ret ? -EAGAIN : 0;
|
|
}
|
|
|
|
static const struct dev_pm_ops mipi_csis_pm_ops = {
|
|
SET_RUNTIME_PM_OPS(mipi_csis_runtime_suspend, mipi_csis_runtime_resume,
|
|
NULL)
|
|
};
|
|
|
|
/* -----------------------------------------------------------------------------
|
|
* Probe/remove & platform driver
|
|
*/
|
|
|
|
static int mipi_csis_subdev_init(struct mipi_csis_device *csis)
|
|
{
|
|
struct v4l2_subdev *sd = &csis->sd;
|
|
|
|
v4l2_subdev_init(sd, &mipi_csis_subdev_ops);
|
|
sd->owner = THIS_MODULE;
|
|
snprintf(sd->name, sizeof(sd->name), "csis-%s",
|
|
dev_name(csis->dev));
|
|
|
|
sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
|
|
sd->ctrl_handler = NULL;
|
|
|
|
sd->entity.function = MEDIA_ENT_F_VID_IF_BRIDGE;
|
|
sd->entity.ops = &mipi_csis_entity_ops;
|
|
|
|
sd->dev = csis->dev;
|
|
|
|
sd->fwnode = fwnode_graph_get_endpoint_by_id(dev_fwnode(csis->dev),
|
|
1, 0, 0);
|
|
if (!sd->fwnode) {
|
|
dev_err(csis->dev, "Unable to retrieve endpoint for port@1\n");
|
|
return -ENOENT;
|
|
}
|
|
|
|
csis->csis_fmt = &mipi_csis_formats[0];
|
|
mipi_csis_init_cfg(sd, NULL);
|
|
|
|
csis->pads[CSIS_PAD_SINK].flags = MEDIA_PAD_FL_SINK
|
|
| MEDIA_PAD_FL_MUST_CONNECT;
|
|
csis->pads[CSIS_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE
|
|
| MEDIA_PAD_FL_MUST_CONNECT;
|
|
return media_entity_pads_init(&sd->entity, CSIS_PADS_NUM,
|
|
csis->pads);
|
|
}
|
|
|
|
static int mipi_csis_parse_dt(struct mipi_csis_device *csis)
|
|
{
|
|
struct device_node *node = csis->dev->of_node;
|
|
|
|
if (of_property_read_u32(node, "clock-frequency",
|
|
&csis->clk_frequency))
|
|
csis->clk_frequency = DEFAULT_SCLK_CSIS_FREQ;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mipi_csis_probe(struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct mipi_csis_device *csis;
|
|
int irq;
|
|
int ret;
|
|
|
|
csis = devm_kzalloc(dev, sizeof(*csis), GFP_KERNEL);
|
|
if (!csis)
|
|
return -ENOMEM;
|
|
|
|
mutex_init(&csis->lock);
|
|
spin_lock_init(&csis->slock);
|
|
|
|
csis->dev = dev;
|
|
csis->info = of_device_get_match_data(dev);
|
|
|
|
memcpy(csis->events, mipi_csis_events, sizeof(csis->events));
|
|
|
|
/* Parse DT properties. */
|
|
ret = mipi_csis_parse_dt(csis);
|
|
if (ret < 0) {
|
|
dev_err(dev, "Failed to parse device tree: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
/* Acquire resources. */
|
|
csis->regs = devm_platform_ioremap_resource(pdev, 0);
|
|
if (IS_ERR(csis->regs))
|
|
return PTR_ERR(csis->regs);
|
|
|
|
irq = platform_get_irq(pdev, 0);
|
|
if (irq < 0)
|
|
return irq;
|
|
|
|
ret = mipi_csis_phy_init(csis);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = mipi_csis_clk_get(csis);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/* Reset PHY and enable the clocks. */
|
|
mipi_csis_phy_reset(csis);
|
|
|
|
ret = mipi_csis_clk_enable(csis);
|
|
if (ret < 0) {
|
|
dev_err(csis->dev, "failed to enable clocks: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
/* Now that the hardware is initialized, request the interrupt. */
|
|
ret = devm_request_irq(dev, irq, mipi_csis_irq_handler, 0,
|
|
dev_name(dev), csis);
|
|
if (ret) {
|
|
dev_err(dev, "Interrupt request failed\n");
|
|
goto disable_clock;
|
|
}
|
|
|
|
/* Initialize and register the subdev. */
|
|
ret = mipi_csis_subdev_init(csis);
|
|
if (ret < 0)
|
|
goto disable_clock;
|
|
|
|
platform_set_drvdata(pdev, &csis->sd);
|
|
|
|
ret = mipi_csis_async_register(csis);
|
|
if (ret < 0) {
|
|
dev_err(dev, "async register failed: %d\n", ret);
|
|
goto cleanup;
|
|
}
|
|
|
|
/* Initialize debugfs. */
|
|
mipi_csis_debugfs_init(csis);
|
|
|
|
/* Enable runtime PM. */
|
|
pm_runtime_enable(dev);
|
|
if (!pm_runtime_enabled(dev)) {
|
|
ret = mipi_csis_runtime_resume(dev);
|
|
if (ret < 0)
|
|
goto unregister_all;
|
|
}
|
|
|
|
dev_info(dev, "lanes: %d, freq: %u\n",
|
|
csis->bus.num_data_lanes, csis->clk_frequency);
|
|
|
|
return 0;
|
|
|
|
unregister_all:
|
|
mipi_csis_debugfs_exit(csis);
|
|
cleanup:
|
|
media_entity_cleanup(&csis->sd.entity);
|
|
v4l2_async_nf_unregister(&csis->notifier);
|
|
v4l2_async_nf_cleanup(&csis->notifier);
|
|
v4l2_async_unregister_subdev(&csis->sd);
|
|
disable_clock:
|
|
mipi_csis_clk_disable(csis);
|
|
fwnode_handle_put(csis->sd.fwnode);
|
|
mutex_destroy(&csis->lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int mipi_csis_remove(struct platform_device *pdev)
|
|
{
|
|
struct v4l2_subdev *sd = platform_get_drvdata(pdev);
|
|
struct mipi_csis_device *csis = sd_to_mipi_csis_device(sd);
|
|
|
|
mipi_csis_debugfs_exit(csis);
|
|
v4l2_async_nf_unregister(&csis->notifier);
|
|
v4l2_async_nf_cleanup(&csis->notifier);
|
|
v4l2_async_unregister_subdev(&csis->sd);
|
|
|
|
pm_runtime_disable(&pdev->dev);
|
|
mipi_csis_runtime_suspend(&pdev->dev);
|
|
mipi_csis_clk_disable(csis);
|
|
media_entity_cleanup(&csis->sd.entity);
|
|
fwnode_handle_put(csis->sd.fwnode);
|
|
mutex_destroy(&csis->lock);
|
|
pm_runtime_set_suspended(&pdev->dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id mipi_csis_of_match[] = {
|
|
{
|
|
.compatible = "fsl,imx7-mipi-csi2",
|
|
.data = &(const struct mipi_csis_info){
|
|
.version = MIPI_CSIS_V3_3,
|
|
.num_clocks = 3,
|
|
},
|
|
}, {
|
|
.compatible = "fsl,imx8mm-mipi-csi2",
|
|
.data = &(const struct mipi_csis_info){
|
|
.version = MIPI_CSIS_V3_6_3,
|
|
.num_clocks = 4,
|
|
},
|
|
},
|
|
{ /* sentinel */ },
|
|
};
|
|
MODULE_DEVICE_TABLE(of, mipi_csis_of_match);
|
|
|
|
static struct platform_driver mipi_csis_driver = {
|
|
.probe = mipi_csis_probe,
|
|
.remove = mipi_csis_remove,
|
|
.driver = {
|
|
.of_match_table = mipi_csis_of_match,
|
|
.name = CSIS_DRIVER_NAME,
|
|
.pm = &mipi_csis_pm_ops,
|
|
},
|
|
};
|
|
|
|
module_platform_driver(mipi_csis_driver);
|
|
|
|
MODULE_DESCRIPTION("i.MX7 & i.MX8 MIPI CSI-2 receiver driver");
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_ALIAS("platform:imx-mipi-csi2");
|