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linuxdebug/drivers/gpu/drm/i2c/tda998x_drv.c

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null pointer error
2024-07-16 15:50:57 +02:00
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2012 Texas Instruments
* Author: Rob Clark <robdclark@gmail.com>
*/
#include <linux/component.h>
#include <linux/gpio/consumer.h>
#include <linux/hdmi.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/platform_data/tda9950.h>
#include <linux/irq.h>
#include <sound/asoundef.h>
#include <sound/hdmi-codec.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_bridge.h>
#include <drm/drm_edid.h>
#include <drm/drm_of.h>
#include <drm/drm_print.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_simple_kms_helper.h>
#include <drm/i2c/tda998x.h>
#include <media/cec-notifier.h>
#define DBG(fmt, ...) DRM_DEBUG(fmt"\n", ##__VA_ARGS__)
enum {
AUDIO_ROUTE_I2S,
AUDIO_ROUTE_SPDIF,
AUDIO_ROUTE_NUM
};
struct tda998x_audio_route {
u8 ena_aclk;
u8 mux_ap;
u8 aip_clksel;
};
struct tda998x_audio_settings {
const struct tda998x_audio_route *route;
struct hdmi_audio_infoframe cea;
unsigned int sample_rate;
u8 status[5];
u8 ena_ap;
u8 i2s_format;
u8 cts_n;
};
struct tda998x_priv {
struct i2c_client *cec;
struct i2c_client *hdmi;
struct mutex mutex;
u16 rev;
u8 cec_addr;
u8 current_page;
bool is_on;
bool supports_infoframes;
bool sink_has_audio;
enum hdmi_quantization_range rgb_quant_range;
u8 vip_cntrl_0;
u8 vip_cntrl_1;
u8 vip_cntrl_2;
unsigned long tmds_clock;
struct tda998x_audio_settings audio;
struct platform_device *audio_pdev;
struct mutex audio_mutex;
struct mutex edid_mutex;
wait_queue_head_t wq_edid;
volatile int wq_edid_wait;
struct work_struct detect_work;
struct timer_list edid_delay_timer;
wait_queue_head_t edid_delay_waitq;
bool edid_delay_active;
struct drm_encoder encoder;
struct drm_bridge bridge;
struct drm_connector connector;
u8 audio_port_enable[AUDIO_ROUTE_NUM];
struct tda9950_glue cec_glue;
struct gpio_desc *calib;
struct cec_notifier *cec_notify;
};
#define conn_to_tda998x_priv(x) \
container_of(x, struct tda998x_priv, connector)
#define enc_to_tda998x_priv(x) \
container_of(x, struct tda998x_priv, encoder)
#define bridge_to_tda998x_priv(x) \
container_of(x, struct tda998x_priv, bridge)
/* The TDA9988 series of devices use a paged register scheme.. to simplify
* things we encode the page # in upper bits of the register #. To read/
* write a given register, we need to make sure CURPAGE register is set
* appropriately. Which implies reads/writes are not atomic. Fun!
*/
#define REG(page, addr) (((page) << 8) | (addr))
#define REG2ADDR(reg) ((reg) & 0xff)
#define REG2PAGE(reg) (((reg) >> 8) & 0xff)
#define REG_CURPAGE 0xff /* write */
/* Page 00h: General Control */
#define REG_VERSION_LSB REG(0x00, 0x00) /* read */
#define REG_MAIN_CNTRL0 REG(0x00, 0x01) /* read/write */
# define MAIN_CNTRL0_SR (1 << 0)
# define MAIN_CNTRL0_DECS (1 << 1)
# define MAIN_CNTRL0_DEHS (1 << 2)
# define MAIN_CNTRL0_CECS (1 << 3)
# define MAIN_CNTRL0_CEHS (1 << 4)
# define MAIN_CNTRL0_SCALER (1 << 7)
#define REG_VERSION_MSB REG(0x00, 0x02) /* read */
#define REG_SOFTRESET REG(0x00, 0x0a) /* write */
# define SOFTRESET_AUDIO (1 << 0)
# define SOFTRESET_I2C_MASTER (1 << 1)
#define REG_DDC_DISABLE REG(0x00, 0x0b) /* read/write */
#define REG_CCLK_ON REG(0x00, 0x0c) /* read/write */
#define REG_I2C_MASTER REG(0x00, 0x0d) /* read/write */
# define I2C_MASTER_DIS_MM (1 << 0)
# define I2C_MASTER_DIS_FILT (1 << 1)
# define I2C_MASTER_APP_STRT_LAT (1 << 2)
#define REG_FEAT_POWERDOWN REG(0x00, 0x0e) /* read/write */
# define FEAT_POWERDOWN_PREFILT BIT(0)
# define FEAT_POWERDOWN_CSC BIT(1)
# define FEAT_POWERDOWN_SPDIF (1 << 3)
#define REG_INT_FLAGS_0 REG(0x00, 0x0f) /* read/write */
#define REG_INT_FLAGS_1 REG(0x00, 0x10) /* read/write */
#define REG_INT_FLAGS_2 REG(0x00, 0x11) /* read/write */
# define INT_FLAGS_2_EDID_BLK_RD (1 << 1)
#define REG_ENA_ACLK REG(0x00, 0x16) /* read/write */
#define REG_ENA_VP_0 REG(0x00, 0x18) /* read/write */
#define REG_ENA_VP_1 REG(0x00, 0x19) /* read/write */
#define REG_ENA_VP_2 REG(0x00, 0x1a) /* read/write */
#define REG_ENA_AP REG(0x00, 0x1e) /* read/write */
#define REG_VIP_CNTRL_0 REG(0x00, 0x20) /* write */
# define VIP_CNTRL_0_MIRR_A (1 << 7)
# define VIP_CNTRL_0_SWAP_A(x) (((x) & 7) << 4)
# define VIP_CNTRL_0_MIRR_B (1 << 3)
# define VIP_CNTRL_0_SWAP_B(x) (((x) & 7) << 0)
#define REG_VIP_CNTRL_1 REG(0x00, 0x21) /* write */
# define VIP_CNTRL_1_MIRR_C (1 << 7)
# define VIP_CNTRL_1_SWAP_C(x) (((x) & 7) << 4)
# define VIP_CNTRL_1_MIRR_D (1 << 3)
# define VIP_CNTRL_1_SWAP_D(x) (((x) & 7) << 0)
#define REG_VIP_CNTRL_2 REG(0x00, 0x22) /* write */
# define VIP_CNTRL_2_MIRR_E (1 << 7)
# define VIP_CNTRL_2_SWAP_E(x) (((x) & 7) << 4)
# define VIP_CNTRL_2_MIRR_F (1 << 3)
# define VIP_CNTRL_2_SWAP_F(x) (((x) & 7) << 0)
#define REG_VIP_CNTRL_3 REG(0x00, 0x23) /* write */
# define VIP_CNTRL_3_X_TGL (1 << 0)
# define VIP_CNTRL_3_H_TGL (1 << 1)
# define VIP_CNTRL_3_V_TGL (1 << 2)
# define VIP_CNTRL_3_EMB (1 << 3)
# define VIP_CNTRL_3_SYNC_DE (1 << 4)
# define VIP_CNTRL_3_SYNC_HS (1 << 5)
# define VIP_CNTRL_3_DE_INT (1 << 6)
# define VIP_CNTRL_3_EDGE (1 << 7)
#define REG_VIP_CNTRL_4 REG(0x00, 0x24) /* write */
# define VIP_CNTRL_4_BLC(x) (((x) & 3) << 0)
# define VIP_CNTRL_4_BLANKIT(x) (((x) & 3) << 2)
# define VIP_CNTRL_4_CCIR656 (1 << 4)
# define VIP_CNTRL_4_656_ALT (1 << 5)
# define VIP_CNTRL_4_TST_656 (1 << 6)
# define VIP_CNTRL_4_TST_PAT (1 << 7)
#define REG_VIP_CNTRL_5 REG(0x00, 0x25) /* write */
# define VIP_CNTRL_5_CKCASE (1 << 0)
# define VIP_CNTRL_5_SP_CNT(x) (((x) & 3) << 1)
#define REG_MUX_AP REG(0x00, 0x26) /* read/write */
# define MUX_AP_SELECT_I2S 0x64
# define MUX_AP_SELECT_SPDIF 0x40
#define REG_MUX_VP_VIP_OUT REG(0x00, 0x27) /* read/write */
#define REG_MAT_CONTRL REG(0x00, 0x80) /* write */
# define MAT_CONTRL_MAT_SC(x) (((x) & 3) << 0)
# define MAT_CONTRL_MAT_BP (1 << 2)
#define REG_VIDFORMAT REG(0x00, 0xa0) /* write */
#define REG_REFPIX_MSB REG(0x00, 0xa1) /* write */
#define REG_REFPIX_LSB REG(0x00, 0xa2) /* write */
#define REG_REFLINE_MSB REG(0x00, 0xa3) /* write */
#define REG_REFLINE_LSB REG(0x00, 0xa4) /* write */
#define REG_NPIX_MSB REG(0x00, 0xa5) /* write */
#define REG_NPIX_LSB REG(0x00, 0xa6) /* write */
#define REG_NLINE_MSB REG(0x00, 0xa7) /* write */
#define REG_NLINE_LSB REG(0x00, 0xa8) /* write */
#define REG_VS_LINE_STRT_1_MSB REG(0x00, 0xa9) /* write */
#define REG_VS_LINE_STRT_1_LSB REG(0x00, 0xaa) /* write */
#define REG_VS_PIX_STRT_1_MSB REG(0x00, 0xab) /* write */
#define REG_VS_PIX_STRT_1_LSB REG(0x00, 0xac) /* write */
#define REG_VS_LINE_END_1_MSB REG(0x00, 0xad) /* write */
#define REG_VS_LINE_END_1_LSB REG(0x00, 0xae) /* write */
#define REG_VS_PIX_END_1_MSB REG(0x00, 0xaf) /* write */
#define REG_VS_PIX_END_1_LSB REG(0x00, 0xb0) /* write */
#define REG_VS_LINE_STRT_2_MSB REG(0x00, 0xb1) /* write */
#define REG_VS_LINE_STRT_2_LSB REG(0x00, 0xb2) /* write */
#define REG_VS_PIX_STRT_2_MSB REG(0x00, 0xb3) /* write */
#define REG_VS_PIX_STRT_2_LSB REG(0x00, 0xb4) /* write */
#define REG_VS_LINE_END_2_MSB REG(0x00, 0xb5) /* write */
#define REG_VS_LINE_END_2_LSB REG(0x00, 0xb6) /* write */
#define REG_VS_PIX_END_2_MSB REG(0x00, 0xb7) /* write */
#define REG_VS_PIX_END_2_LSB REG(0x00, 0xb8) /* write */
#define REG_HS_PIX_START_MSB REG(0x00, 0xb9) /* write */
#define REG_HS_PIX_START_LSB REG(0x00, 0xba) /* write */
#define REG_HS_PIX_STOP_MSB REG(0x00, 0xbb) /* write */
#define REG_HS_PIX_STOP_LSB REG(0x00, 0xbc) /* write */
#define REG_VWIN_START_1_MSB REG(0x00, 0xbd) /* write */
#define REG_VWIN_START_1_LSB REG(0x00, 0xbe) /* write */
#define REG_VWIN_END_1_MSB REG(0x00, 0xbf) /* write */
#define REG_VWIN_END_1_LSB REG(0x00, 0xc0) /* write */
#define REG_VWIN_START_2_MSB REG(0x00, 0xc1) /* write */
#define REG_VWIN_START_2_LSB REG(0x00, 0xc2) /* write */
#define REG_VWIN_END_2_MSB REG(0x00, 0xc3) /* write */
#define REG_VWIN_END_2_LSB REG(0x00, 0xc4) /* write */
#define REG_DE_START_MSB REG(0x00, 0xc5) /* write */
#define REG_DE_START_LSB REG(0x00, 0xc6) /* write */
#define REG_DE_STOP_MSB REG(0x00, 0xc7) /* write */
#define REG_DE_STOP_LSB REG(0x00, 0xc8) /* write */
#define REG_TBG_CNTRL_0 REG(0x00, 0xca) /* write */
# define TBG_CNTRL_0_TOP_TGL (1 << 0)
# define TBG_CNTRL_0_TOP_SEL (1 << 1)
# define TBG_CNTRL_0_DE_EXT (1 << 2)
# define TBG_CNTRL_0_TOP_EXT (1 << 3)
# define TBG_CNTRL_0_FRAME_DIS (1 << 5)
# define TBG_CNTRL_0_SYNC_MTHD (1 << 6)
# define TBG_CNTRL_0_SYNC_ONCE (1 << 7)
#define REG_TBG_CNTRL_1 REG(0x00, 0xcb) /* write */
# define TBG_CNTRL_1_H_TGL (1 << 0)
# define TBG_CNTRL_1_V_TGL (1 << 1)
# define TBG_CNTRL_1_TGL_EN (1 << 2)
# define TBG_CNTRL_1_X_EXT (1 << 3)
# define TBG_CNTRL_1_H_EXT (1 << 4)
# define TBG_CNTRL_1_V_EXT (1 << 5)
# define TBG_CNTRL_1_DWIN_DIS (1 << 6)
#define REG_ENABLE_SPACE REG(0x00, 0xd6) /* write */
#define REG_HVF_CNTRL_0 REG(0x00, 0xe4) /* write */
# define HVF_CNTRL_0_SM (1 << 7)
# define HVF_CNTRL_0_RWB (1 << 6)
# define HVF_CNTRL_0_PREFIL(x) (((x) & 3) << 2)
# define HVF_CNTRL_0_INTPOL(x) (((x) & 3) << 0)
#define REG_HVF_CNTRL_1 REG(0x00, 0xe5) /* write */
# define HVF_CNTRL_1_FOR (1 << 0)
# define HVF_CNTRL_1_YUVBLK (1 << 1)
# define HVF_CNTRL_1_VQR(x) (((x) & 3) << 2)
# define HVF_CNTRL_1_PAD(x) (((x) & 3) << 4)
# define HVF_CNTRL_1_SEMI_PLANAR (1 << 6)
#define REG_RPT_CNTRL REG(0x00, 0xf0) /* write */
# define RPT_CNTRL_REPEAT(x) ((x) & 15)
#define REG_I2S_FORMAT REG(0x00, 0xfc) /* read/write */
# define I2S_FORMAT_PHILIPS (0 << 0)
# define I2S_FORMAT_LEFT_J (2 << 0)
# define I2S_FORMAT_RIGHT_J (3 << 0)
#define REG_AIP_CLKSEL REG(0x00, 0xfd) /* write */
# define AIP_CLKSEL_AIP_SPDIF (0 << 3)
# define AIP_CLKSEL_AIP_I2S (1 << 3)
# define AIP_CLKSEL_FS_ACLK (0 << 0)
# define AIP_CLKSEL_FS_MCLK (1 << 0)
# define AIP_CLKSEL_FS_FS64SPDIF (2 << 0)
/* Page 02h: PLL settings */
#define REG_PLL_SERIAL_1 REG(0x02, 0x00) /* read/write */
# define PLL_SERIAL_1_SRL_FDN (1 << 0)
# define PLL_SERIAL_1_SRL_IZ(x) (((x) & 3) << 1)
# define PLL_SERIAL_1_SRL_MAN_IZ (1 << 6)
#define REG_PLL_SERIAL_2 REG(0x02, 0x01) /* read/write */
# define PLL_SERIAL_2_SRL_NOSC(x) ((x) << 0)
# define PLL_SERIAL_2_SRL_PR(x) (((x) & 0xf) << 4)
#define REG_PLL_SERIAL_3 REG(0x02, 0x02) /* read/write */
# define PLL_SERIAL_3_SRL_CCIR (1 << 0)
# define PLL_SERIAL_3_SRL_DE (1 << 2)
# define PLL_SERIAL_3_SRL_PXIN_SEL (1 << 4)
#define REG_SERIALIZER REG(0x02, 0x03) /* read/write */
#define REG_BUFFER_OUT REG(0x02, 0x04) /* read/write */
#define REG_PLL_SCG1 REG(0x02, 0x05) /* read/write */
#define REG_PLL_SCG2 REG(0x02, 0x06) /* read/write */
#define REG_PLL_SCGN1 REG(0x02, 0x07) /* read/write */
#define REG_PLL_SCGN2 REG(0x02, 0x08) /* read/write */
#define REG_PLL_SCGR1 REG(0x02, 0x09) /* read/write */
#define REG_PLL_SCGR2 REG(0x02, 0x0a) /* read/write */
#define REG_AUDIO_DIV REG(0x02, 0x0e) /* read/write */
# define AUDIO_DIV_SERCLK_1 0
# define AUDIO_DIV_SERCLK_2 1
# define AUDIO_DIV_SERCLK_4 2
# define AUDIO_DIV_SERCLK_8 3
# define AUDIO_DIV_SERCLK_16 4
# define AUDIO_DIV_SERCLK_32 5
#define REG_SEL_CLK REG(0x02, 0x11) /* read/write */
# define SEL_CLK_SEL_CLK1 (1 << 0)
# define SEL_CLK_SEL_VRF_CLK(x) (((x) & 3) << 1)
# define SEL_CLK_ENA_SC_CLK (1 << 3)
#define REG_ANA_GENERAL REG(0x02, 0x12) /* read/write */
/* Page 09h: EDID Control */
#define REG_EDID_DATA_0 REG(0x09, 0x00) /* read */
/* next 127 successive registers are the EDID block */
#define REG_EDID_CTRL REG(0x09, 0xfa) /* read/write */
#define REG_DDC_ADDR REG(0x09, 0xfb) /* read/write */
#define REG_DDC_OFFS REG(0x09, 0xfc) /* read/write */
#define REG_DDC_SEGM_ADDR REG(0x09, 0xfd) /* read/write */
#define REG_DDC_SEGM REG(0x09, 0xfe) /* read/write */
/* Page 10h: information frames and packets */
#define REG_IF1_HB0 REG(0x10, 0x20) /* read/write */
#define REG_IF2_HB0 REG(0x10, 0x40) /* read/write */
#define REG_IF3_HB0 REG(0x10, 0x60) /* read/write */
#define REG_IF4_HB0 REG(0x10, 0x80) /* read/write */
#define REG_IF5_HB0 REG(0x10, 0xa0) /* read/write */
/* Page 11h: audio settings and content info packets */
#define REG_AIP_CNTRL_0 REG(0x11, 0x00) /* read/write */
# define AIP_CNTRL_0_RST_FIFO (1 << 0)
# define AIP_CNTRL_0_SWAP (1 << 1)
# define AIP_CNTRL_0_LAYOUT (1 << 2)
# define AIP_CNTRL_0_ACR_MAN (1 << 5)
# define AIP_CNTRL_0_RST_CTS (1 << 6)
#define REG_CA_I2S REG(0x11, 0x01) /* read/write */
# define CA_I2S_CA_I2S(x) (((x) & 31) << 0)
# define CA_I2S_HBR_CHSTAT (1 << 6)
#define REG_LATENCY_RD REG(0x11, 0x04) /* read/write */
#define REG_ACR_CTS_0 REG(0x11, 0x05) /* read/write */
#define REG_ACR_CTS_1 REG(0x11, 0x06) /* read/write */
#define REG_ACR_CTS_2 REG(0x11, 0x07) /* read/write */
#define REG_ACR_N_0 REG(0x11, 0x08) /* read/write */
#define REG_ACR_N_1 REG(0x11, 0x09) /* read/write */
#define REG_ACR_N_2 REG(0x11, 0x0a) /* read/write */
#define REG_CTS_N REG(0x11, 0x0c) /* read/write */
# define CTS_N_K(x) (((x) & 7) << 0)
# define CTS_N_M(x) (((x) & 3) << 4)
#define REG_ENC_CNTRL REG(0x11, 0x0d) /* read/write */
# define ENC_CNTRL_RST_ENC (1 << 0)
# define ENC_CNTRL_RST_SEL (1 << 1)
# define ENC_CNTRL_CTL_CODE(x) (((x) & 3) << 2)
#define REG_DIP_FLAGS REG(0x11, 0x0e) /* read/write */
# define DIP_FLAGS_ACR (1 << 0)
# define DIP_FLAGS_GC (1 << 1)
#define REG_DIP_IF_FLAGS REG(0x11, 0x0f) /* read/write */
# define DIP_IF_FLAGS_IF1 (1 << 1)
# define DIP_IF_FLAGS_IF2 (1 << 2)
# define DIP_IF_FLAGS_IF3 (1 << 3)
# define DIP_IF_FLAGS_IF4 (1 << 4)
# define DIP_IF_FLAGS_IF5 (1 << 5)
#define REG_CH_STAT_B(x) REG(0x11, 0x14 + (x)) /* read/write */
/* Page 12h: HDCP and OTP */
#define REG_TX3 REG(0x12, 0x9a) /* read/write */
#define REG_TX4 REG(0x12, 0x9b) /* read/write */
# define TX4_PD_RAM (1 << 1)
#define REG_TX33 REG(0x12, 0xb8) /* read/write */
# define TX33_HDMI (1 << 1)
/* Page 13h: Gamut related metadata packets */
/* CEC registers: (not paged)
*/
#define REG_CEC_INTSTATUS 0xee /* read */
# define CEC_INTSTATUS_CEC (1 << 0)
# define CEC_INTSTATUS_HDMI (1 << 1)
#define REG_CEC_CAL_XOSC_CTRL1 0xf2
# define CEC_CAL_XOSC_CTRL1_ENA_CAL BIT(0)
#define REG_CEC_DES_FREQ2 0xf5
# define CEC_DES_FREQ2_DIS_AUTOCAL BIT(7)
#define REG_CEC_CLK 0xf6
# define CEC_CLK_FRO 0x11
#define REG_CEC_FRO_IM_CLK_CTRL 0xfb /* read/write */
# define CEC_FRO_IM_CLK_CTRL_GHOST_DIS (1 << 7)
# define CEC_FRO_IM_CLK_CTRL_ENA_OTP (1 << 6)
# define CEC_FRO_IM_CLK_CTRL_IMCLK_SEL (1 << 1)
# define CEC_FRO_IM_CLK_CTRL_FRO_DIV (1 << 0)
#define REG_CEC_RXSHPDINTENA 0xfc /* read/write */
#define REG_CEC_RXSHPDINT 0xfd /* read */
# define CEC_RXSHPDINT_RXSENS BIT(0)
# define CEC_RXSHPDINT_HPD BIT(1)
#define REG_CEC_RXSHPDLEV 0xfe /* read */
# define CEC_RXSHPDLEV_RXSENS (1 << 0)
# define CEC_RXSHPDLEV_HPD (1 << 1)
#define REG_CEC_ENAMODS 0xff /* read/write */
# define CEC_ENAMODS_EN_CEC_CLK (1 << 7)
# define CEC_ENAMODS_DIS_FRO (1 << 6)
# define CEC_ENAMODS_DIS_CCLK (1 << 5)
# define CEC_ENAMODS_EN_RXSENS (1 << 2)
# define CEC_ENAMODS_EN_HDMI (1 << 1)
# define CEC_ENAMODS_EN_CEC (1 << 0)
/* Device versions: */
#define TDA9989N2 0x0101
#define TDA19989 0x0201
#define TDA19989N2 0x0202
#define TDA19988 0x0301
static void
cec_write(struct tda998x_priv *priv, u16 addr, u8 val)
{
u8 buf[] = {addr, val};
struct i2c_msg msg = {
.addr = priv->cec_addr,
.len = 2,
.buf = buf,
};
int ret;
ret = i2c_transfer(priv->hdmi->adapter, &msg, 1);
if (ret < 0)
dev_err(&priv->hdmi->dev, "Error %d writing to cec:0x%x\n",
ret, addr);
}
static u8
cec_read(struct tda998x_priv *priv, u8 addr)
{
u8 val;
struct i2c_msg msg[2] = {
{
.addr = priv->cec_addr,
.len = 1,
.buf = &addr,
}, {
.addr = priv->cec_addr,
.flags = I2C_M_RD,
.len = 1,
.buf = &val,
},
};
int ret;
ret = i2c_transfer(priv->hdmi->adapter, msg, ARRAY_SIZE(msg));
if (ret < 0) {
dev_err(&priv->hdmi->dev, "Error %d reading from cec:0x%x\n",
ret, addr);
val = 0;
}
return val;
}
static void cec_enamods(struct tda998x_priv *priv, u8 mods, bool enable)
{
int val = cec_read(priv, REG_CEC_ENAMODS);
if (val < 0)
return;
if (enable)
val |= mods;
else
val &= ~mods;
cec_write(priv, REG_CEC_ENAMODS, val);
}
static void tda998x_cec_set_calibration(struct tda998x_priv *priv, bool enable)
{
if (enable) {
u8 val;
cec_write(priv, 0xf3, 0xc0);
cec_write(priv, 0xf4, 0xd4);
/* Enable automatic calibration mode */
val = cec_read(priv, REG_CEC_DES_FREQ2);
val &= ~CEC_DES_FREQ2_DIS_AUTOCAL;
cec_write(priv, REG_CEC_DES_FREQ2, val);
/* Enable free running oscillator */
cec_write(priv, REG_CEC_CLK, CEC_CLK_FRO);
cec_enamods(priv, CEC_ENAMODS_DIS_FRO, false);
cec_write(priv, REG_CEC_CAL_XOSC_CTRL1,
CEC_CAL_XOSC_CTRL1_ENA_CAL);
} else {
cec_write(priv, REG_CEC_CAL_XOSC_CTRL1, 0);
}
}
/*
* Calibration for the internal oscillator: we need to set calibration mode,
* and then pulse the IRQ line low for a 10ms ± 1% period.
*/
static void tda998x_cec_calibration(struct tda998x_priv *priv)
{
struct gpio_desc *calib = priv->calib;
mutex_lock(&priv->edid_mutex);
if (priv->hdmi->irq > 0)
disable_irq(priv->hdmi->irq);
gpiod_direction_output(calib, 1);
tda998x_cec_set_calibration(priv, true);
local_irq_disable();
gpiod_set_value(calib, 0);
mdelay(10);
gpiod_set_value(calib, 1);
local_irq_enable();
tda998x_cec_set_calibration(priv, false);
gpiod_direction_input(calib);
if (priv->hdmi->irq > 0)
enable_irq(priv->hdmi->irq);
mutex_unlock(&priv->edid_mutex);
}
static int tda998x_cec_hook_init(void *data)
{
struct tda998x_priv *priv = data;
struct gpio_desc *calib;
calib = gpiod_get(&priv->hdmi->dev, "nxp,calib", GPIOD_ASIS);
if (IS_ERR(calib)) {
dev_warn(&priv->hdmi->dev, "failed to get calibration gpio: %ld\n",
PTR_ERR(calib));
return PTR_ERR(calib);
}
priv->calib = calib;
return 0;
}
static void tda998x_cec_hook_exit(void *data)
{
struct tda998x_priv *priv = data;
gpiod_put(priv->calib);
priv->calib = NULL;
}
static int tda998x_cec_hook_open(void *data)
{
struct tda998x_priv *priv = data;
cec_enamods(priv, CEC_ENAMODS_EN_CEC_CLK | CEC_ENAMODS_EN_CEC, true);
tda998x_cec_calibration(priv);
return 0;
}
static void tda998x_cec_hook_release(void *data)
{
struct tda998x_priv *priv = data;
cec_enamods(priv, CEC_ENAMODS_EN_CEC_CLK | CEC_ENAMODS_EN_CEC, false);
}
static int
set_page(struct tda998x_priv *priv, u16 reg)
{
if (REG2PAGE(reg) != priv->current_page) {
struct i2c_client *client = priv->hdmi;
u8 buf[] = {
REG_CURPAGE, REG2PAGE(reg)
};
int ret = i2c_master_send(client, buf, sizeof(buf));
if (ret < 0) {
dev_err(&client->dev, "%s %04x err %d\n", __func__,
reg, ret);
return ret;
}
priv->current_page = REG2PAGE(reg);
}
return 0;
}
static int
reg_read_range(struct tda998x_priv *priv, u16 reg, char *buf, int cnt)
{
struct i2c_client *client = priv->hdmi;
u8 addr = REG2ADDR(reg);
int ret;
mutex_lock(&priv->mutex);
ret = set_page(priv, reg);
if (ret < 0)
goto out;
ret = i2c_master_send(client, &addr, sizeof(addr));
if (ret < 0)
goto fail;
ret = i2c_master_recv(client, buf, cnt);
if (ret < 0)
goto fail;
goto out;
fail:
dev_err(&client->dev, "Error %d reading from 0x%x\n", ret, reg);
out:
mutex_unlock(&priv->mutex);
return ret;
}
#define MAX_WRITE_RANGE_BUF 32
static void
reg_write_range(struct tda998x_priv *priv, u16 reg, u8 *p, int cnt)
{
struct i2c_client *client = priv->hdmi;
/* This is the maximum size of the buffer passed in */
u8 buf[MAX_WRITE_RANGE_BUF + 1];
int ret;
if (cnt > MAX_WRITE_RANGE_BUF) {
dev_err(&client->dev, "Fixed write buffer too small (%d)\n",
MAX_WRITE_RANGE_BUF);
return;
}
buf[0] = REG2ADDR(reg);
memcpy(&buf[1], p, cnt);
mutex_lock(&priv->mutex);
ret = set_page(priv, reg);
if (ret < 0)
goto out;
ret = i2c_master_send(client, buf, cnt + 1);
if (ret < 0)
dev_err(&client->dev, "Error %d writing to 0x%x\n", ret, reg);
out:
mutex_unlock(&priv->mutex);
}
static int
reg_read(struct tda998x_priv *priv, u16 reg)
{
u8 val = 0;
int ret;
ret = reg_read_range(priv, reg, &val, sizeof(val));
if (ret < 0)
return ret;
return val;
}
static void
reg_write(struct tda998x_priv *priv, u16 reg, u8 val)
{
struct i2c_client *client = priv->hdmi;
u8 buf[] = {REG2ADDR(reg), val};
int ret;
mutex_lock(&priv->mutex);
ret = set_page(priv, reg);
if (ret < 0)
goto out;
ret = i2c_master_send(client, buf, sizeof(buf));
if (ret < 0)
dev_err(&client->dev, "Error %d writing to 0x%x\n", ret, reg);
out:
mutex_unlock(&priv->mutex);
}
static void
reg_write16(struct tda998x_priv *priv, u16 reg, u16 val)
{
struct i2c_client *client = priv->hdmi;
u8 buf[] = {REG2ADDR(reg), val >> 8, val};
int ret;
mutex_lock(&priv->mutex);
ret = set_page(priv, reg);
if (ret < 0)
goto out;
ret = i2c_master_send(client, buf, sizeof(buf));
if (ret < 0)
dev_err(&client->dev, "Error %d writing to 0x%x\n", ret, reg);
out:
mutex_unlock(&priv->mutex);
}
static void
reg_set(struct tda998x_priv *priv, u16 reg, u8 val)
{
int old_val;
old_val = reg_read(priv, reg);
if (old_val >= 0)
reg_write(priv, reg, old_val | val);
}
static void
reg_clear(struct tda998x_priv *priv, u16 reg, u8 val)
{
int old_val;
old_val = reg_read(priv, reg);
if (old_val >= 0)
reg_write(priv, reg, old_val & ~val);
}
static void
tda998x_reset(struct tda998x_priv *priv)
{
/* reset audio and i2c master: */
reg_write(priv, REG_SOFTRESET, SOFTRESET_AUDIO | SOFTRESET_I2C_MASTER);
msleep(50);
reg_write(priv, REG_SOFTRESET, 0);
msleep(50);
/* reset transmitter: */
reg_set(priv, REG_MAIN_CNTRL0, MAIN_CNTRL0_SR);
reg_clear(priv, REG_MAIN_CNTRL0, MAIN_CNTRL0_SR);
/* PLL registers common configuration */
reg_write(priv, REG_PLL_SERIAL_1, 0x00);
reg_write(priv, REG_PLL_SERIAL_2, PLL_SERIAL_2_SRL_NOSC(1));
reg_write(priv, REG_PLL_SERIAL_3, 0x00);
reg_write(priv, REG_SERIALIZER, 0x00);
reg_write(priv, REG_BUFFER_OUT, 0x00);
reg_write(priv, REG_PLL_SCG1, 0x00);
reg_write(priv, REG_AUDIO_DIV, AUDIO_DIV_SERCLK_8);
reg_write(priv, REG_SEL_CLK, SEL_CLK_SEL_CLK1 | SEL_CLK_ENA_SC_CLK);
reg_write(priv, REG_PLL_SCGN1, 0xfa);
reg_write(priv, REG_PLL_SCGN2, 0x00);
reg_write(priv, REG_PLL_SCGR1, 0x5b);
reg_write(priv, REG_PLL_SCGR2, 0x00);
reg_write(priv, REG_PLL_SCG2, 0x10);
/* Write the default value MUX register */
reg_write(priv, REG_MUX_VP_VIP_OUT, 0x24);
}
/*
* The TDA998x has a problem when trying to read the EDID close to a
* HPD assertion: it needs a delay of 100ms to avoid timing out while
* trying to read EDID data.
*
* However, tda998x_connector_get_modes() may be called at any moment
* after tda998x_connector_detect() indicates that we are connected, so
* we need to delay probing modes in tda998x_connector_get_modes() after
* we have seen a HPD inactive->active transition. This code implements
* that delay.
*/
static void tda998x_edid_delay_done(struct timer_list *t)
{
struct tda998x_priv *priv = from_timer(priv, t, edid_delay_timer);
priv->edid_delay_active = false;
wake_up(&priv->edid_delay_waitq);
schedule_work(&priv->detect_work);
}
static void tda998x_edid_delay_start(struct tda998x_priv *priv)
{
priv->edid_delay_active = true;
mod_timer(&priv->edid_delay_timer, jiffies + HZ/10);
}
static int tda998x_edid_delay_wait(struct tda998x_priv *priv)
{
return wait_event_killable(priv->edid_delay_waitq, !priv->edid_delay_active);
}
/*
* We need to run the KMS hotplug event helper outside of our threaded
* interrupt routine as this can call back into our get_modes method,
* which will want to make use of interrupts.
*/
static void tda998x_detect_work(struct work_struct *work)
{
struct tda998x_priv *priv =
container_of(work, struct tda998x_priv, detect_work);
struct drm_device *dev = priv->connector.dev;
if (dev)
drm_kms_helper_hotplug_event(dev);
}
/*
* only 2 interrupts may occur: screen plug/unplug and EDID read
*/
static irqreturn_t tda998x_irq_thread(int irq, void *data)
{
struct tda998x_priv *priv = data;
u8 sta, cec, lvl, flag0, flag1, flag2;
bool handled = false;
sta = cec_read(priv, REG_CEC_INTSTATUS);
if (sta & CEC_INTSTATUS_HDMI) {
cec = cec_read(priv, REG_CEC_RXSHPDINT);
lvl = cec_read(priv, REG_CEC_RXSHPDLEV);
flag0 = reg_read(priv, REG_INT_FLAGS_0);
flag1 = reg_read(priv, REG_INT_FLAGS_1);
flag2 = reg_read(priv, REG_INT_FLAGS_2);
DRM_DEBUG_DRIVER(
"tda irq sta %02x cec %02x lvl %02x f0 %02x f1 %02x f2 %02x\n",
sta, cec, lvl, flag0, flag1, flag2);
if (cec & CEC_RXSHPDINT_HPD) {
if (lvl & CEC_RXSHPDLEV_HPD) {
tda998x_edid_delay_start(priv);
} else {
schedule_work(&priv->detect_work);
cec_notifier_phys_addr_invalidate(
priv->cec_notify);
}
handled = true;
}
if ((flag2 & INT_FLAGS_2_EDID_BLK_RD) && priv->wq_edid_wait) {
priv->wq_edid_wait = 0;
wake_up(&priv->wq_edid);
handled = true;
}
}
return IRQ_RETVAL(handled);
}
static void
tda998x_write_if(struct tda998x_priv *priv, u8 bit, u16 addr,
union hdmi_infoframe *frame)
{
u8 buf[MAX_WRITE_RANGE_BUF];
ssize_t len;
len = hdmi_infoframe_pack(frame, buf, sizeof(buf));
if (len < 0) {
dev_err(&priv->hdmi->dev,
"hdmi_infoframe_pack() type=0x%02x failed: %zd\n",
frame->any.type, len);
return;
}
reg_clear(priv, REG_DIP_IF_FLAGS, bit);
reg_write_range(priv, addr, buf, len);
reg_set(priv, REG_DIP_IF_FLAGS, bit);
}
static void tda998x_write_aif(struct tda998x_priv *priv,
const struct hdmi_audio_infoframe *cea)
{
union hdmi_infoframe frame;
frame.audio = *cea;
tda998x_write_if(priv, DIP_IF_FLAGS_IF4, REG_IF4_HB0, &frame);
}
static void
tda998x_write_avi(struct tda998x_priv *priv, const struct drm_display_mode *mode)
{
union hdmi_infoframe frame;
drm_hdmi_avi_infoframe_from_display_mode(&frame.avi,
&priv->connector, mode);
frame.avi.quantization_range = HDMI_QUANTIZATION_RANGE_FULL;
drm_hdmi_avi_infoframe_quant_range(&frame.avi, &priv->connector, mode,
priv->rgb_quant_range);
tda998x_write_if(priv, DIP_IF_FLAGS_IF2, REG_IF2_HB0, &frame);
}
static void tda998x_write_vsi(struct tda998x_priv *priv,
const struct drm_display_mode *mode)
{
union hdmi_infoframe frame;
if (drm_hdmi_vendor_infoframe_from_display_mode(&frame.vendor.hdmi,
&priv->connector,
mode))
reg_clear(priv, REG_DIP_IF_FLAGS, DIP_IF_FLAGS_IF1);
else
tda998x_write_if(priv, DIP_IF_FLAGS_IF1, REG_IF1_HB0, &frame);
}
/* Audio support */
static const struct tda998x_audio_route tda998x_audio_route[AUDIO_ROUTE_NUM] = {
[AUDIO_ROUTE_I2S] = {
.ena_aclk = 1,
.mux_ap = MUX_AP_SELECT_I2S,
.aip_clksel = AIP_CLKSEL_AIP_I2S | AIP_CLKSEL_FS_ACLK,
},
[AUDIO_ROUTE_SPDIF] = {
.ena_aclk = 0,
.mux_ap = MUX_AP_SELECT_SPDIF,
.aip_clksel = AIP_CLKSEL_AIP_SPDIF | AIP_CLKSEL_FS_FS64SPDIF,
},
};
/* Configure the TDA998x audio data and clock routing. */
static int tda998x_derive_routing(struct tda998x_priv *priv,
struct tda998x_audio_settings *s,
unsigned int route)
{
s->route = &tda998x_audio_route[route];
s->ena_ap = priv->audio_port_enable[route];
if (s->ena_ap == 0) {
dev_err(&priv->hdmi->dev, "no audio configuration found\n");
return -EINVAL;
}
return 0;
}
/*
* The audio clock divisor register controls a divider producing Audio_Clk_Out
* from SERclk by dividing it by 2^n where 0 <= n <= 5. We don't know what
* Audio_Clk_Out or SERclk are. We guess SERclk is the same as TMDS clock.
*
* It seems that Audio_Clk_Out must be the smallest value that is greater
* than 128*fs, otherwise audio does not function. There is some suggestion
* that 126*fs is a better value.
*/
static u8 tda998x_get_adiv(struct tda998x_priv *priv, unsigned int fs)
{
unsigned long min_audio_clk = fs * 128;
unsigned long ser_clk = priv->tmds_clock * 1000;
u8 adiv;
for (adiv = AUDIO_DIV_SERCLK_32; adiv != AUDIO_DIV_SERCLK_1; adiv--)
if (ser_clk > min_audio_clk << adiv)
break;
dev_dbg(&priv->hdmi->dev,
"ser_clk=%luHz fs=%uHz min_aclk=%luHz adiv=%d\n",
ser_clk, fs, min_audio_clk, adiv);
return adiv;
}
/*
* In auto-CTS mode, the TDA998x uses a "measured time stamp" counter to
* generate the CTS value. It appears that the "measured time stamp" is
* the number of TDMS clock cycles within a number of audio input clock
* cycles defined by the k and N parameters defined below, in a similar
* way to that which is set out in the CTS generation in the HDMI spec.
*
* tmdsclk ----> mts -> /m ---> CTS
* ^
* sclk -> /k -> /N
*
* CTS = mts / m, where m is 2^M.
* /k is a divider based on the K value below, K+1 for K < 4, or 8 for K >= 4
* /N is a divider based on the HDMI specified N value.
*
* This produces the following equation:
* CTS = tmds_clock * k * N / (sclk * m)
*
* When combined with the sink-side equation, and realising that sclk is
* bclk_ratio * fs, we end up with:
* k = m * bclk_ratio / 128.
*
* Note: S/PDIF always uses a bclk_ratio of 64.
*/
static int tda998x_derive_cts_n(struct tda998x_priv *priv,
struct tda998x_audio_settings *settings,
unsigned int ratio)
{
switch (ratio) {
case 16:
settings->cts_n = CTS_N_M(3) | CTS_N_K(0);
break;
case 32:
settings->cts_n = CTS_N_M(3) | CTS_N_K(1);
break;
case 48:
settings->cts_n = CTS_N_M(3) | CTS_N_K(2);
break;
case 64:
settings->cts_n = CTS_N_M(3) | CTS_N_K(3);
break;
case 128:
settings->cts_n = CTS_N_M(0) | CTS_N_K(0);
break;
default:
dev_err(&priv->hdmi->dev, "unsupported bclk ratio %ufs\n",
ratio);
return -EINVAL;
}
return 0;
}
static void tda998x_audio_mute(struct tda998x_priv *priv, bool on)
{
if (on) {
reg_set(priv, REG_SOFTRESET, SOFTRESET_AUDIO);
reg_clear(priv, REG_SOFTRESET, SOFTRESET_AUDIO);
reg_set(priv, REG_AIP_CNTRL_0, AIP_CNTRL_0_RST_FIFO);
} else {
reg_clear(priv, REG_AIP_CNTRL_0, AIP_CNTRL_0_RST_FIFO);
}
}
static void tda998x_configure_audio(struct tda998x_priv *priv)
{
const struct tda998x_audio_settings *settings = &priv->audio;
u8 buf[6], adiv;
u32 n;
/* If audio is not configured, there is nothing to do. */
if (settings->ena_ap == 0)
return;
adiv = tda998x_get_adiv(priv, settings->sample_rate);
/* Enable audio ports */
reg_write(priv, REG_ENA_AP, settings->ena_ap);
reg_write(priv, REG_ENA_ACLK, settings->route->ena_aclk);
reg_write(priv, REG_MUX_AP, settings->route->mux_ap);
reg_write(priv, REG_I2S_FORMAT, settings->i2s_format);
reg_write(priv, REG_AIP_CLKSEL, settings->route->aip_clksel);
reg_clear(priv, REG_AIP_CNTRL_0, AIP_CNTRL_0_LAYOUT |
AIP_CNTRL_0_ACR_MAN); /* auto CTS */
reg_write(priv, REG_CTS_N, settings->cts_n);
reg_write(priv, REG_AUDIO_DIV, adiv);
/*
* This is the approximate value of N, which happens to be
* the recommended values for non-coherent clocks.
*/
n = 128 * settings->sample_rate / 1000;
/* Write the CTS and N values */
buf[0] = 0x44;
buf[1] = 0x42;
buf[2] = 0x01;
buf[3] = n;
buf[4] = n >> 8;
buf[5] = n >> 16;
reg_write_range(priv, REG_ACR_CTS_0, buf, 6);
/* Reset CTS generator */
reg_set(priv, REG_AIP_CNTRL_0, AIP_CNTRL_0_RST_CTS);
reg_clear(priv, REG_AIP_CNTRL_0, AIP_CNTRL_0_RST_CTS);
/* Write the channel status
* The REG_CH_STAT_B-registers skip IEC958 AES2 byte, because
* there is a separate register for each I2S wire.
*/
buf[0] = settings->status[0];
buf[1] = settings->status[1];
buf[2] = settings->status[3];
buf[3] = settings->status[4];
reg_write_range(priv, REG_CH_STAT_B(0), buf, 4);
tda998x_audio_mute(priv, true);
msleep(20);
tda998x_audio_mute(priv, false);
tda998x_write_aif(priv, &settings->cea);
}
static int tda998x_audio_hw_params(struct device *dev, void *data,
struct hdmi_codec_daifmt *daifmt,
struct hdmi_codec_params *params)
{
struct tda998x_priv *priv = dev_get_drvdata(dev);
unsigned int bclk_ratio;
bool spdif = daifmt->fmt == HDMI_SPDIF;
int ret;
struct tda998x_audio_settings audio = {
.sample_rate = params->sample_rate,
.cea = params->cea,
};
memcpy(audio.status, params->iec.status,
min(sizeof(audio.status), sizeof(params->iec.status)));
switch (daifmt->fmt) {
case HDMI_I2S:
audio.i2s_format = I2S_FORMAT_PHILIPS;
break;
case HDMI_LEFT_J:
audio.i2s_format = I2S_FORMAT_LEFT_J;
break;
case HDMI_RIGHT_J:
audio.i2s_format = I2S_FORMAT_RIGHT_J;
break;
case HDMI_SPDIF:
audio.i2s_format = 0;
break;
default:
dev_err(dev, "%s: Invalid format %d\n", __func__, daifmt->fmt);
return -EINVAL;
}
if (!spdif &&
(daifmt->bit_clk_inv || daifmt->frame_clk_inv ||
daifmt->bit_clk_provider || daifmt->frame_clk_provider)) {
dev_err(dev, "%s: Bad flags %d %d %d %d\n", __func__,
daifmt->bit_clk_inv, daifmt->frame_clk_inv,
daifmt->bit_clk_provider,
daifmt->frame_clk_provider);
return -EINVAL;
}
ret = tda998x_derive_routing(priv, &audio, AUDIO_ROUTE_I2S + spdif);
if (ret < 0)
return ret;
bclk_ratio = spdif ? 64 : params->sample_width * 2;
ret = tda998x_derive_cts_n(priv, &audio, bclk_ratio);
if (ret < 0)
return ret;
mutex_lock(&priv->audio_mutex);
priv->audio = audio;
if (priv->supports_infoframes && priv->sink_has_audio)
tda998x_configure_audio(priv);
mutex_unlock(&priv->audio_mutex);
return 0;
}
static void tda998x_audio_shutdown(struct device *dev, void *data)
{
struct tda998x_priv *priv = dev_get_drvdata(dev);
mutex_lock(&priv->audio_mutex);
reg_write(priv, REG_ENA_AP, 0);
priv->audio.ena_ap = 0;
mutex_unlock(&priv->audio_mutex);
}
static int tda998x_audio_mute_stream(struct device *dev, void *data,
bool enable, int direction)
{
struct tda998x_priv *priv = dev_get_drvdata(dev);
mutex_lock(&priv->audio_mutex);
tda998x_audio_mute(priv, enable);
mutex_unlock(&priv->audio_mutex);
return 0;
}
static int tda998x_audio_get_eld(struct device *dev, void *data,
uint8_t *buf, size_t len)
{
struct tda998x_priv *priv = dev_get_drvdata(dev);
mutex_lock(&priv->audio_mutex);
memcpy(buf, priv->connector.eld,
min(sizeof(priv->connector.eld), len));
mutex_unlock(&priv->audio_mutex);
return 0;
}
static const struct hdmi_codec_ops audio_codec_ops = {
.hw_params = tda998x_audio_hw_params,
.audio_shutdown = tda998x_audio_shutdown,
.mute_stream = tda998x_audio_mute_stream,
.get_eld = tda998x_audio_get_eld,
.no_capture_mute = 1,
};
static int tda998x_audio_codec_init(struct tda998x_priv *priv,
struct device *dev)
{
struct hdmi_codec_pdata codec_data = {
.ops = &audio_codec_ops,
.max_i2s_channels = 2,
};
if (priv->audio_port_enable[AUDIO_ROUTE_I2S])
codec_data.i2s = 1;
if (priv->audio_port_enable[AUDIO_ROUTE_SPDIF])
codec_data.spdif = 1;
priv->audio_pdev = platform_device_register_data(
dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO,
&codec_data, sizeof(codec_data));
return PTR_ERR_OR_ZERO(priv->audio_pdev);
}
/* DRM connector functions */
static enum drm_connector_status
tda998x_connector_detect(struct drm_connector *connector, bool force)
{
struct tda998x_priv *priv = conn_to_tda998x_priv(connector);
u8 val = cec_read(priv, REG_CEC_RXSHPDLEV);
return (val & CEC_RXSHPDLEV_HPD) ? connector_status_connected :
connector_status_disconnected;
}
static void tda998x_connector_destroy(struct drm_connector *connector)
{
drm_connector_cleanup(connector);
}
static const struct drm_connector_funcs tda998x_connector_funcs = {
.reset = drm_atomic_helper_connector_reset,
.fill_modes = drm_helper_probe_single_connector_modes,
.detect = tda998x_connector_detect,
.destroy = tda998x_connector_destroy,
.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
};
static int read_edid_block(void *data, u8 *buf, unsigned int blk, size_t length)
{
struct tda998x_priv *priv = data;
u8 offset, segptr;
int ret, i;
offset = (blk & 1) ? 128 : 0;
segptr = blk / 2;
mutex_lock(&priv->edid_mutex);
reg_write(priv, REG_DDC_ADDR, 0xa0);
reg_write(priv, REG_DDC_OFFS, offset);
reg_write(priv, REG_DDC_SEGM_ADDR, 0x60);
reg_write(priv, REG_DDC_SEGM, segptr);
/* enable reading EDID: */
priv->wq_edid_wait = 1;
reg_write(priv, REG_EDID_CTRL, 0x1);
/* flag must be cleared by sw: */
reg_write(priv, REG_EDID_CTRL, 0x0);
/* wait for block read to complete: */
if (priv->hdmi->irq) {
i = wait_event_timeout(priv->wq_edid,
!priv->wq_edid_wait,
msecs_to_jiffies(100));
if (i < 0) {
dev_err(&priv->hdmi->dev, "read edid wait err %d\n", i);
ret = i;
goto failed;
}
} else {
for (i = 100; i > 0; i--) {
msleep(1);
ret = reg_read(priv, REG_INT_FLAGS_2);
if (ret < 0)
goto failed;
if (ret & INT_FLAGS_2_EDID_BLK_RD)
break;
}
}
if (i == 0) {
dev_err(&priv->hdmi->dev, "read edid timeout\n");
ret = -ETIMEDOUT;
goto failed;
}
ret = reg_read_range(priv, REG_EDID_DATA_0, buf, length);
if (ret != length) {
dev_err(&priv->hdmi->dev, "failed to read edid block %d: %d\n",
blk, ret);
goto failed;
}
ret = 0;
failed:
mutex_unlock(&priv->edid_mutex);
return ret;
}
static int tda998x_connector_get_modes(struct drm_connector *connector)
{
struct tda998x_priv *priv = conn_to_tda998x_priv(connector);
struct edid *edid;
int n;
/*
* If we get killed while waiting for the HPD timeout, return
* no modes found: we are not in a restartable path, so we
* can't handle signals gracefully.
*/
if (tda998x_edid_delay_wait(priv))
return 0;
if (priv->rev == TDA19988)
reg_clear(priv, REG_TX4, TX4_PD_RAM);
edid = drm_do_get_edid(connector, read_edid_block, priv);
if (priv->rev == TDA19988)
reg_set(priv, REG_TX4, TX4_PD_RAM);
if (!edid) {
dev_warn(&priv->hdmi->dev, "failed to read EDID\n");
return 0;
}
drm_connector_update_edid_property(connector, edid);
cec_notifier_set_phys_addr_from_edid(priv->cec_notify, edid);
mutex_lock(&priv->audio_mutex);
n = drm_add_edid_modes(connector, edid);
priv->sink_has_audio = drm_detect_monitor_audio(edid);
mutex_unlock(&priv->audio_mutex);
kfree(edid);
return n;
}
static struct drm_encoder *
tda998x_connector_best_encoder(struct drm_connector *connector)
{
struct tda998x_priv *priv = conn_to_tda998x_priv(connector);
return priv->bridge.encoder;
}
static
const struct drm_connector_helper_funcs tda998x_connector_helper_funcs = {
.get_modes = tda998x_connector_get_modes,
.best_encoder = tda998x_connector_best_encoder,
};
static int tda998x_connector_init(struct tda998x_priv *priv,
struct drm_device *drm)
{
struct drm_connector *connector = &priv->connector;
int ret;
connector->interlace_allowed = 1;
if (priv->hdmi->irq)
connector->polled = DRM_CONNECTOR_POLL_HPD;
else
connector->polled = DRM_CONNECTOR_POLL_CONNECT |
DRM_CONNECTOR_POLL_DISCONNECT;
drm_connector_helper_add(connector, &tda998x_connector_helper_funcs);
ret = drm_connector_init(drm, connector, &tda998x_connector_funcs,
DRM_MODE_CONNECTOR_HDMIA);
if (ret)
return ret;
drm_connector_attach_encoder(&priv->connector,
priv->bridge.encoder);
return 0;
}
/* DRM bridge functions */
static int tda998x_bridge_attach(struct drm_bridge *bridge,
enum drm_bridge_attach_flags flags)
{
struct tda998x_priv *priv = bridge_to_tda998x_priv(bridge);
if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR) {
DRM_ERROR("Fix bridge driver to make connector optional!");
return -EINVAL;
}
return tda998x_connector_init(priv, bridge->dev);
}
static void tda998x_bridge_detach(struct drm_bridge *bridge)
{
struct tda998x_priv *priv = bridge_to_tda998x_priv(bridge);
drm_connector_cleanup(&priv->connector);
}
static enum drm_mode_status tda998x_bridge_mode_valid(struct drm_bridge *bridge,
const struct drm_display_info *info,
const struct drm_display_mode *mode)
{
/* TDA19988 dotclock can go up to 165MHz */
struct tda998x_priv *priv = bridge_to_tda998x_priv(bridge);
if (mode->clock > ((priv->rev == TDA19988) ? 165000 : 150000))
return MODE_CLOCK_HIGH;
if (mode->htotal >= BIT(13))
return MODE_BAD_HVALUE;
if (mode->vtotal >= BIT(11))
return MODE_BAD_VVALUE;
return MODE_OK;
}
static void tda998x_bridge_enable(struct drm_bridge *bridge)
{
struct tda998x_priv *priv = bridge_to_tda998x_priv(bridge);
if (!priv->is_on) {
/* enable video ports, audio will be enabled later */
reg_write(priv, REG_ENA_VP_0, 0xff);
reg_write(priv, REG_ENA_VP_1, 0xff);
reg_write(priv, REG_ENA_VP_2, 0xff);
/* set muxing after enabling ports: */
reg_write(priv, REG_VIP_CNTRL_0, priv->vip_cntrl_0);
reg_write(priv, REG_VIP_CNTRL_1, priv->vip_cntrl_1);
reg_write(priv, REG_VIP_CNTRL_2, priv->vip_cntrl_2);
priv->is_on = true;
}
}
static void tda998x_bridge_disable(struct drm_bridge *bridge)
{
struct tda998x_priv *priv = bridge_to_tda998x_priv(bridge);
if (priv->is_on) {
/* disable video ports */
reg_write(priv, REG_ENA_VP_0, 0x00);
reg_write(priv, REG_ENA_VP_1, 0x00);
reg_write(priv, REG_ENA_VP_2, 0x00);
priv->is_on = false;
}
}
static void tda998x_bridge_mode_set(struct drm_bridge *bridge,
const struct drm_display_mode *mode,
const struct drm_display_mode *adjusted_mode)
{
struct tda998x_priv *priv = bridge_to_tda998x_priv(bridge);
unsigned long tmds_clock;
u16 ref_pix, ref_line, n_pix, n_line;
u16 hs_pix_s, hs_pix_e;
u16 vs1_pix_s, vs1_pix_e, vs1_line_s, vs1_line_e;
u16 vs2_pix_s, vs2_pix_e, vs2_line_s, vs2_line_e;
u16 vwin1_line_s, vwin1_line_e;
u16 vwin2_line_s, vwin2_line_e;
u16 de_pix_s, de_pix_e;
u8 reg, div, rep, sel_clk;
/*
* Since we are "computer" like, our source invariably produces
* full-range RGB. If the monitor supports full-range, then use
* it, otherwise reduce to limited-range.
*/
priv->rgb_quant_range =
priv->connector.display_info.rgb_quant_range_selectable ?
HDMI_QUANTIZATION_RANGE_FULL :
drm_default_rgb_quant_range(adjusted_mode);
/*
* Internally TDA998x is using ITU-R BT.656 style sync but
* we get VESA style sync. TDA998x is using a reference pixel
* relative to ITU to sync to the input frame and for output
* sync generation. Currently, we are using reference detection
* from HS/VS, i.e. REFPIX/REFLINE denote frame start sync point
* which is position of rising VS with coincident rising HS.
*
* Now there is some issues to take care of:
* - HDMI data islands require sync-before-active
* - TDA998x register values must be > 0 to be enabled
* - REFLINE needs an additional offset of +1
* - REFPIX needs an addtional offset of +1 for UYUV and +3 for RGB
*
* So we add +1 to all horizontal and vertical register values,
* plus an additional +3 for REFPIX as we are using RGB input only.
*/
n_pix = mode->htotal;
n_line = mode->vtotal;
hs_pix_e = mode->hsync_end - mode->hdisplay;
hs_pix_s = mode->hsync_start - mode->hdisplay;
de_pix_e = mode->htotal;
de_pix_s = mode->htotal - mode->hdisplay;
ref_pix = 3 + hs_pix_s;
/*
* Attached LCD controllers may generate broken sync. Allow
* those to adjust the position of the rising VS edge by adding
* HSKEW to ref_pix.
*/
if (adjusted_mode->flags & DRM_MODE_FLAG_HSKEW)
ref_pix += adjusted_mode->hskew;
if ((mode->flags & DRM_MODE_FLAG_INTERLACE) == 0) {
ref_line = 1 + mode->vsync_start - mode->vdisplay;
vwin1_line_s = mode->vtotal - mode->vdisplay - 1;
vwin1_line_e = vwin1_line_s + mode->vdisplay;
vs1_pix_s = vs1_pix_e = hs_pix_s;
vs1_line_s = mode->vsync_start - mode->vdisplay;
vs1_line_e = vs1_line_s +
mode->vsync_end - mode->vsync_start;
vwin2_line_s = vwin2_line_e = 0;
vs2_pix_s = vs2_pix_e = 0;
vs2_line_s = vs2_line_e = 0;
} else {
ref_line = 1 + (mode->vsync_start - mode->vdisplay)/2;
vwin1_line_s = (mode->vtotal - mode->vdisplay)/2;
vwin1_line_e = vwin1_line_s + mode->vdisplay/2;
vs1_pix_s = vs1_pix_e = hs_pix_s;
vs1_line_s = (mode->vsync_start - mode->vdisplay)/2;
vs1_line_e = vs1_line_s +
(mode->vsync_end - mode->vsync_start)/2;
vwin2_line_s = vwin1_line_s + mode->vtotal/2;
vwin2_line_e = vwin2_line_s + mode->vdisplay/2;
vs2_pix_s = vs2_pix_e = hs_pix_s + mode->htotal/2;
vs2_line_s = vs1_line_s + mode->vtotal/2 ;
vs2_line_e = vs2_line_s +
(mode->vsync_end - mode->vsync_start)/2;
}
/*
* Select pixel repeat depending on the double-clock flag
* (which means we have to repeat each pixel once.)
*/
rep = mode->flags & DRM_MODE_FLAG_DBLCLK ? 1 : 0;
sel_clk = SEL_CLK_ENA_SC_CLK | SEL_CLK_SEL_CLK1 |
SEL_CLK_SEL_VRF_CLK(rep ? 2 : 0);
/* the TMDS clock is scaled up by the pixel repeat */
tmds_clock = mode->clock * (1 + rep);
/*
* The divisor is power-of-2. The TDA9983B datasheet gives
* this as ranges of Msample/s, which is 10x the TMDS clock:
* 0 - 800 to 1500 Msample/s
* 1 - 400 to 800 Msample/s
* 2 - 200 to 400 Msample/s
* 3 - as 2 above
*/
for (div = 0; div < 3; div++)
if (80000 >> div <= tmds_clock)
break;
mutex_lock(&priv->audio_mutex);
priv->tmds_clock = tmds_clock;
/* mute the audio FIFO: */
reg_set(priv, REG_AIP_CNTRL_0, AIP_CNTRL_0_RST_FIFO);
/* set HDMI HDCP mode off: */
reg_write(priv, REG_TBG_CNTRL_1, TBG_CNTRL_1_DWIN_DIS);
reg_clear(priv, REG_TX33, TX33_HDMI);
reg_write(priv, REG_ENC_CNTRL, ENC_CNTRL_CTL_CODE(0));
/* no pre-filter or interpolator: */
reg_write(priv, REG_HVF_CNTRL_0, HVF_CNTRL_0_PREFIL(0) |
HVF_CNTRL_0_INTPOL(0));
reg_set(priv, REG_FEAT_POWERDOWN, FEAT_POWERDOWN_PREFILT);
reg_write(priv, REG_VIP_CNTRL_5, VIP_CNTRL_5_SP_CNT(0));
reg_write(priv, REG_VIP_CNTRL_4, VIP_CNTRL_4_BLANKIT(0) |
VIP_CNTRL_4_BLC(0));
reg_clear(priv, REG_PLL_SERIAL_1, PLL_SERIAL_1_SRL_MAN_IZ);
reg_clear(priv, REG_PLL_SERIAL_3, PLL_SERIAL_3_SRL_CCIR |
PLL_SERIAL_3_SRL_DE);
reg_write(priv, REG_SERIALIZER, 0);
reg_write(priv, REG_HVF_CNTRL_1, HVF_CNTRL_1_VQR(0));
reg_write(priv, REG_RPT_CNTRL, RPT_CNTRL_REPEAT(rep));
reg_write(priv, REG_SEL_CLK, sel_clk);
reg_write(priv, REG_PLL_SERIAL_2, PLL_SERIAL_2_SRL_NOSC(div) |
PLL_SERIAL_2_SRL_PR(rep));
/* set color matrix according to output rgb quant range */
if (priv->rgb_quant_range == HDMI_QUANTIZATION_RANGE_LIMITED) {
static u8 tda998x_full_to_limited_range[] = {
MAT_CONTRL_MAT_SC(2),
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x03, 0x6f, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x03, 0x6f, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x03, 0x6f,
0x00, 0x40, 0x00, 0x40, 0x00, 0x40
};
reg_clear(priv, REG_FEAT_POWERDOWN, FEAT_POWERDOWN_CSC);
reg_write_range(priv, REG_MAT_CONTRL,
tda998x_full_to_limited_range,
sizeof(tda998x_full_to_limited_range));
} else {
reg_write(priv, REG_MAT_CONTRL, MAT_CONTRL_MAT_BP |
MAT_CONTRL_MAT_SC(1));
reg_set(priv, REG_FEAT_POWERDOWN, FEAT_POWERDOWN_CSC);
}
/* set BIAS tmds value: */
reg_write(priv, REG_ANA_GENERAL, 0x09);
/*
* Sync on rising HSYNC/VSYNC
*/
reg = VIP_CNTRL_3_SYNC_HS;
/*
* TDA19988 requires high-active sync at input stage,
* so invert low-active sync provided by master encoder here
*/
if (mode->flags & DRM_MODE_FLAG_NHSYNC)
reg |= VIP_CNTRL_3_H_TGL;
if (mode->flags & DRM_MODE_FLAG_NVSYNC)
reg |= VIP_CNTRL_3_V_TGL;
reg_write(priv, REG_VIP_CNTRL_3, reg);
reg_write(priv, REG_VIDFORMAT, 0x00);
reg_write16(priv, REG_REFPIX_MSB, ref_pix);
reg_write16(priv, REG_REFLINE_MSB, ref_line);
reg_write16(priv, REG_NPIX_MSB, n_pix);
reg_write16(priv, REG_NLINE_MSB, n_line);
reg_write16(priv, REG_VS_LINE_STRT_1_MSB, vs1_line_s);
reg_write16(priv, REG_VS_PIX_STRT_1_MSB, vs1_pix_s);
reg_write16(priv, REG_VS_LINE_END_1_MSB, vs1_line_e);
reg_write16(priv, REG_VS_PIX_END_1_MSB, vs1_pix_e);
reg_write16(priv, REG_VS_LINE_STRT_2_MSB, vs2_line_s);
reg_write16(priv, REG_VS_PIX_STRT_2_MSB, vs2_pix_s);
reg_write16(priv, REG_VS_LINE_END_2_MSB, vs2_line_e);
reg_write16(priv, REG_VS_PIX_END_2_MSB, vs2_pix_e);
reg_write16(priv, REG_HS_PIX_START_MSB, hs_pix_s);
reg_write16(priv, REG_HS_PIX_STOP_MSB, hs_pix_e);
reg_write16(priv, REG_VWIN_START_1_MSB, vwin1_line_s);
reg_write16(priv, REG_VWIN_END_1_MSB, vwin1_line_e);
reg_write16(priv, REG_VWIN_START_2_MSB, vwin2_line_s);
reg_write16(priv, REG_VWIN_END_2_MSB, vwin2_line_e);
reg_write16(priv, REG_DE_START_MSB, de_pix_s);
reg_write16(priv, REG_DE_STOP_MSB, de_pix_e);
if (priv->rev == TDA19988) {
/* let incoming pixels fill the active space (if any) */
reg_write(priv, REG_ENABLE_SPACE, 0x00);
}
/*
* Always generate sync polarity relative to input sync and
* revert input stage toggled sync at output stage
*/
reg = TBG_CNTRL_1_DWIN_DIS | TBG_CNTRL_1_TGL_EN;
if (mode->flags & DRM_MODE_FLAG_NHSYNC)
reg |= TBG_CNTRL_1_H_TGL;
if (mode->flags & DRM_MODE_FLAG_NVSYNC)
reg |= TBG_CNTRL_1_V_TGL;
reg_write(priv, REG_TBG_CNTRL_1, reg);
/* must be last register set: */
reg_write(priv, REG_TBG_CNTRL_0, 0);
/* CEA-861B section 6 says that:
* CEA version 1 (CEA-861) has no support for infoframes.
* CEA version 2 (CEA-861A) supports version 1 AVI infoframes,
* and optional basic audio.
* CEA version 3 (CEA-861B) supports version 1 and 2 AVI infoframes,
* and optional digital audio, with audio infoframes.
*
* Since we only support generation of version 2 AVI infoframes,
* ignore CEA version 2 and below (iow, behave as if we're a
* CEA-861 source.)
*/
priv->supports_infoframes = priv->connector.display_info.cea_rev >= 3;
if (priv->supports_infoframes) {
/* We need to turn HDMI HDCP stuff on to get audio through */
reg &= ~TBG_CNTRL_1_DWIN_DIS;
reg_write(priv, REG_TBG_CNTRL_1, reg);
reg_write(priv, REG_ENC_CNTRL, ENC_CNTRL_CTL_CODE(1));
reg_set(priv, REG_TX33, TX33_HDMI);
tda998x_write_avi(priv, adjusted_mode);
tda998x_write_vsi(priv, adjusted_mode);
if (priv->sink_has_audio)
tda998x_configure_audio(priv);
}
mutex_unlock(&priv->audio_mutex);
}
static const struct drm_bridge_funcs tda998x_bridge_funcs = {
.attach = tda998x_bridge_attach,
.detach = tda998x_bridge_detach,
.mode_valid = tda998x_bridge_mode_valid,
.disable = tda998x_bridge_disable,
.mode_set = tda998x_bridge_mode_set,
.enable = tda998x_bridge_enable,
};
/* I2C driver functions */
static int tda998x_get_audio_ports(struct tda998x_priv *priv,
struct device_node *np)
{
const u32 *port_data;
u32 size;
int i;
port_data = of_get_property(np, "audio-ports", &size);
if (!port_data)
return 0;
size /= sizeof(u32);
if (size > 2 * ARRAY_SIZE(priv->audio_port_enable) || size % 2 != 0) {
dev_err(&priv->hdmi->dev,
"Bad number of elements in audio-ports dt-property\n");
return -EINVAL;
}
size /= 2;
for (i = 0; i < size; i++) {
unsigned int route;
u8 afmt = be32_to_cpup(&port_data[2*i]);
u8 ena_ap = be32_to_cpup(&port_data[2*i+1]);
switch (afmt) {
case AFMT_I2S:
route = AUDIO_ROUTE_I2S;
break;
case AFMT_SPDIF:
route = AUDIO_ROUTE_SPDIF;
break;
default:
dev_err(&priv->hdmi->dev,
"Bad audio format %u\n", afmt);
return -EINVAL;
}
if (!ena_ap) {
dev_err(&priv->hdmi->dev, "invalid zero port config\n");
continue;
}
if (priv->audio_port_enable[route]) {
dev_err(&priv->hdmi->dev,
"%s format already configured\n",
route == AUDIO_ROUTE_SPDIF ? "SPDIF" : "I2S");
return -EINVAL;
}
priv->audio_port_enable[route] = ena_ap;
}
return 0;
}
static int tda998x_set_config(struct tda998x_priv *priv,
const struct tda998x_encoder_params *p)
{
priv->vip_cntrl_0 = VIP_CNTRL_0_SWAP_A(p->swap_a) |
(p->mirr_a ? VIP_CNTRL_0_MIRR_A : 0) |
VIP_CNTRL_0_SWAP_B(p->swap_b) |
(p->mirr_b ? VIP_CNTRL_0_MIRR_B : 0);
priv->vip_cntrl_1 = VIP_CNTRL_1_SWAP_C(p->swap_c) |
(p->mirr_c ? VIP_CNTRL_1_MIRR_C : 0) |
VIP_CNTRL_1_SWAP_D(p->swap_d) |
(p->mirr_d ? VIP_CNTRL_1_MIRR_D : 0);
priv->vip_cntrl_2 = VIP_CNTRL_2_SWAP_E(p->swap_e) |
(p->mirr_e ? VIP_CNTRL_2_MIRR_E : 0) |
VIP_CNTRL_2_SWAP_F(p->swap_f) |
(p->mirr_f ? VIP_CNTRL_2_MIRR_F : 0);
if (p->audio_params.format != AFMT_UNUSED) {
unsigned int ratio, route;
bool spdif = p->audio_params.format == AFMT_SPDIF;
route = AUDIO_ROUTE_I2S + spdif;
priv->audio.route = &tda998x_audio_route[route];
priv->audio.cea = p->audio_params.cea;
priv->audio.sample_rate = p->audio_params.sample_rate;
memcpy(priv->audio.status, p->audio_params.status,
min(sizeof(priv->audio.status),
sizeof(p->audio_params.status)));
priv->audio.ena_ap = p->audio_params.config;
priv->audio.i2s_format = I2S_FORMAT_PHILIPS;
ratio = spdif ? 64 : p->audio_params.sample_width * 2;
return tda998x_derive_cts_n(priv, &priv->audio, ratio);
}
return 0;
}
static void tda998x_destroy(struct device *dev)
{
struct tda998x_priv *priv = dev_get_drvdata(dev);
drm_bridge_remove(&priv->bridge);
/* disable all IRQs and free the IRQ handler */
cec_write(priv, REG_CEC_RXSHPDINTENA, 0);
reg_clear(priv, REG_INT_FLAGS_2, INT_FLAGS_2_EDID_BLK_RD);
if (priv->audio_pdev)
platform_device_unregister(priv->audio_pdev);
if (priv->hdmi->irq)
free_irq(priv->hdmi->irq, priv);
del_timer_sync(&priv->edid_delay_timer);
cancel_work_sync(&priv->detect_work);
i2c_unregister_device(priv->cec);
cec_notifier_conn_unregister(priv->cec_notify);
}
static int tda998x_create(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct device_node *np = client->dev.of_node;
struct i2c_board_info cec_info;
struct tda998x_priv *priv;
u32 video;
int rev_lo, rev_hi, ret;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
dev_set_drvdata(dev, priv);
mutex_init(&priv->mutex); /* protect the page access */
mutex_init(&priv->audio_mutex); /* protect access from audio thread */
mutex_init(&priv->edid_mutex);
INIT_LIST_HEAD(&priv->bridge.list);
init_waitqueue_head(&priv->edid_delay_waitq);
timer_setup(&priv->edid_delay_timer, tda998x_edid_delay_done, 0);
INIT_WORK(&priv->detect_work, tda998x_detect_work);
priv->vip_cntrl_0 = VIP_CNTRL_0_SWAP_A(2) | VIP_CNTRL_0_SWAP_B(3);
priv->vip_cntrl_1 = VIP_CNTRL_1_SWAP_C(0) | VIP_CNTRL_1_SWAP_D(1);
priv->vip_cntrl_2 = VIP_CNTRL_2_SWAP_E(4) | VIP_CNTRL_2_SWAP_F(5);
/* CEC I2C address bound to TDA998x I2C addr by configuration pins */
priv->cec_addr = 0x34 + (client->addr & 0x03);
priv->current_page = 0xff;
priv->hdmi = client;
/* wake up the device: */
cec_write(priv, REG_CEC_ENAMODS,
CEC_ENAMODS_EN_RXSENS | CEC_ENAMODS_EN_HDMI);
tda998x_reset(priv);
/* read version: */
rev_lo = reg_read(priv, REG_VERSION_LSB);
if (rev_lo < 0) {
dev_err(dev, "failed to read version: %d\n", rev_lo);
return rev_lo;
}
rev_hi = reg_read(priv, REG_VERSION_MSB);
if (rev_hi < 0) {
dev_err(dev, "failed to read version: %d\n", rev_hi);
return rev_hi;
}
priv->rev = rev_lo | rev_hi << 8;
/* mask off feature bits: */
priv->rev &= ~0x30; /* not-hdcp and not-scalar bit */
switch (priv->rev) {
case TDA9989N2:
dev_info(dev, "found TDA9989 n2");
break;
case TDA19989:
dev_info(dev, "found TDA19989");
break;
case TDA19989N2:
dev_info(dev, "found TDA19989 n2");
break;
case TDA19988:
dev_info(dev, "found TDA19988");
break;
default:
dev_err(dev, "found unsupported device: %04x\n", priv->rev);
return -ENXIO;
}
/* after reset, enable DDC: */
reg_write(priv, REG_DDC_DISABLE, 0x00);
/* set clock on DDC channel: */
reg_write(priv, REG_TX3, 39);
/* if necessary, disable multi-master: */
if (priv->rev == TDA19989)
reg_set(priv, REG_I2C_MASTER, I2C_MASTER_DIS_MM);
cec_write(priv, REG_CEC_FRO_IM_CLK_CTRL,
CEC_FRO_IM_CLK_CTRL_GHOST_DIS | CEC_FRO_IM_CLK_CTRL_IMCLK_SEL);
/* ensure interrupts are disabled */
cec_write(priv, REG_CEC_RXSHPDINTENA, 0);
/* clear pending interrupts */
cec_read(priv, REG_CEC_RXSHPDINT);
reg_read(priv, REG_INT_FLAGS_0);
reg_read(priv, REG_INT_FLAGS_1);
reg_read(priv, REG_INT_FLAGS_2);
/* initialize the optional IRQ */
if (client->irq) {
unsigned long irq_flags;
/* init read EDID waitqueue and HDP work */
init_waitqueue_head(&priv->wq_edid);
irq_flags =
irqd_get_trigger_type(irq_get_irq_data(client->irq));
priv->cec_glue.irq_flags = irq_flags;
irq_flags |= IRQF_SHARED | IRQF_ONESHOT;
ret = request_threaded_irq(client->irq, NULL,
tda998x_irq_thread, irq_flags,
"tda998x", priv);
if (ret) {
dev_err(dev, "failed to request IRQ#%u: %d\n",
client->irq, ret);
goto err_irq;
}
/* enable HPD irq */
cec_write(priv, REG_CEC_RXSHPDINTENA, CEC_RXSHPDLEV_HPD);
}
priv->cec_notify = cec_notifier_conn_register(dev, NULL, NULL);
if (!priv->cec_notify) {
ret = -ENOMEM;
goto fail;
}
priv->cec_glue.parent = dev;
priv->cec_glue.data = priv;
priv->cec_glue.init = tda998x_cec_hook_init;
priv->cec_glue.exit = tda998x_cec_hook_exit;
priv->cec_glue.open = tda998x_cec_hook_open;
priv->cec_glue.release = tda998x_cec_hook_release;
/*
* Some TDA998x are actually two I2C devices merged onto one piece
* of silicon: TDA9989 and TDA19989 combine the HDMI transmitter
* with a slightly modified TDA9950 CEC device. The CEC device
* is at the TDA9950 address, with the address pins strapped across
* to the TDA998x address pins. Hence, it always has the same
* offset.
*/
memset(&cec_info, 0, sizeof(cec_info));
strlcpy(cec_info.type, "tda9950", sizeof(cec_info.type));
cec_info.addr = priv->cec_addr;
cec_info.platform_data = &priv->cec_glue;
cec_info.irq = client->irq;
priv->cec = i2c_new_client_device(client->adapter, &cec_info);
if (IS_ERR(priv->cec)) {
ret = PTR_ERR(priv->cec);
goto fail;
}
/* enable EDID read irq: */
reg_set(priv, REG_INT_FLAGS_2, INT_FLAGS_2_EDID_BLK_RD);
if (np) {
/* get the device tree parameters */
ret = of_property_read_u32(np, "video-ports", &video);
if (ret == 0) {
priv->vip_cntrl_0 = video >> 16;
priv->vip_cntrl_1 = video >> 8;
priv->vip_cntrl_2 = video;
}
ret = tda998x_get_audio_ports(priv, np);
if (ret)
goto fail;
if (priv->audio_port_enable[AUDIO_ROUTE_I2S] ||
priv->audio_port_enable[AUDIO_ROUTE_SPDIF])
tda998x_audio_codec_init(priv, &client->dev);
} else if (dev->platform_data) {
ret = tda998x_set_config(priv, dev->platform_data);
if (ret)
goto fail;
}
priv->bridge.funcs = &tda998x_bridge_funcs;
#ifdef CONFIG_OF
priv->bridge.of_node = dev->of_node;
#endif
drm_bridge_add(&priv->bridge);
return 0;
fail:
tda998x_destroy(dev);
err_irq:
return ret;
}
/* DRM encoder functions */
static int tda998x_encoder_init(struct device *dev, struct drm_device *drm)
{
struct tda998x_priv *priv = dev_get_drvdata(dev);
u32 crtcs = 0;
int ret;
if (dev->of_node)
crtcs = drm_of_find_possible_crtcs(drm, dev->of_node);
/* If no CRTCs were found, fall back to our old behaviour */
if (crtcs == 0) {
dev_warn(dev, "Falling back to first CRTC\n");
crtcs = 1 << 0;
}
priv->encoder.possible_crtcs = crtcs;
ret = drm_simple_encoder_init(drm, &priv->encoder,
DRM_MODE_ENCODER_TMDS);
if (ret)
goto err_encoder;
ret = drm_bridge_attach(&priv->encoder, &priv->bridge, NULL, 0);
if (ret)
goto err_bridge;
return 0;
err_bridge:
drm_encoder_cleanup(&priv->encoder);
err_encoder:
return ret;
}
static int tda998x_bind(struct device *dev, struct device *master, void *data)
{
struct drm_device *drm = data;
return tda998x_encoder_init(dev, drm);
}
static void tda998x_unbind(struct device *dev, struct device *master,
void *data)
{
struct tda998x_priv *priv = dev_get_drvdata(dev);
drm_encoder_cleanup(&priv->encoder);
}
static const struct component_ops tda998x_ops = {
.bind = tda998x_bind,
.unbind = tda998x_unbind,
};
static int
tda998x_probe(struct i2c_client *client, const struct i2c_device_id *id)
{
int ret;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
dev_warn(&client->dev, "adapter does not support I2C\n");
return -EIO;
}
ret = tda998x_create(&client->dev);
if (ret)
return ret;
ret = component_add(&client->dev, &tda998x_ops);
if (ret)
tda998x_destroy(&client->dev);
return ret;
}
static void tda998x_remove(struct i2c_client *client)
{
component_del(&client->dev, &tda998x_ops);
tda998x_destroy(&client->dev);
}
#ifdef CONFIG_OF
static const struct of_device_id tda998x_dt_ids[] = {
{ .compatible = "nxp,tda998x", },
{ }
};
MODULE_DEVICE_TABLE(of, tda998x_dt_ids);
#endif
static const struct i2c_device_id tda998x_ids[] = {
{ "tda998x", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, tda998x_ids);
static struct i2c_driver tda998x_driver = {
.probe = tda998x_probe,
.remove = tda998x_remove,
.driver = {
.name = "tda998x",
.of_match_table = of_match_ptr(tda998x_dt_ids),
},
.id_table = tda998x_ids,
};
module_i2c_driver(tda998x_driver);
MODULE_AUTHOR("Rob Clark <robdclark@gmail.com");
MODULE_DESCRIPTION("NXP Semiconductors TDA998X HDMI Encoder");
MODULE_LICENSE("GPL");