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linuxdebug/drivers/gpu/drm/vc4/vc4_vec.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) 2016 Broadcom
*/
/**
* DOC: VC4 SDTV module
*
* The VEC encoder generates PAL or NTSC composite video output.
*
* TV mode selection is done by an atomic property on the encoder,
* because a drm_mode_modeinfo is insufficient to distinguish between
* PAL and PAL-M or NTSC and NTSC-J.
*/
#include <drm/drm_atomic_helper.h>
#include <drm/drm_drv.h>
#include <drm/drm_edid.h>
#include <drm/drm_panel.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_simple_kms_helper.h>
#include <linux/clk.h>
#include <linux/component.h>
#include <linux/of_graph.h>
#include <linux/of_platform.h>
#include <linux/pm_runtime.h>
#include "vc4_drv.h"
#include "vc4_regs.h"
/* WSE Registers */
#define VEC_WSE_RESET 0xc0
#define VEC_WSE_CONTROL 0xc4
#define VEC_WSE_WSS_ENABLE BIT(7)
#define VEC_WSE_WSS_DATA 0xc8
#define VEC_WSE_VPS_DATA1 0xcc
#define VEC_WSE_VPS_CONTROL 0xd0
/* VEC Registers */
#define VEC_REVID 0x100
#define VEC_CONFIG0 0x104
#define VEC_CONFIG0_YDEL_MASK GENMASK(28, 26)
#define VEC_CONFIG0_YDEL(x) ((x) << 26)
#define VEC_CONFIG0_CDEL_MASK GENMASK(25, 24)
#define VEC_CONFIG0_CDEL(x) ((x) << 24)
#define VEC_CONFIG0_PBPR_FIL BIT(18)
#define VEC_CONFIG0_CHROMA_GAIN_MASK GENMASK(17, 16)
#define VEC_CONFIG0_CHROMA_GAIN_UNITY (0 << 16)
#define VEC_CONFIG0_CHROMA_GAIN_1_32 (1 << 16)
#define VEC_CONFIG0_CHROMA_GAIN_1_16 (2 << 16)
#define VEC_CONFIG0_CHROMA_GAIN_1_8 (3 << 16)
#define VEC_CONFIG0_CBURST_GAIN_MASK GENMASK(14, 13)
#define VEC_CONFIG0_CBURST_GAIN_UNITY (0 << 13)
#define VEC_CONFIG0_CBURST_GAIN_1_128 (1 << 13)
#define VEC_CONFIG0_CBURST_GAIN_1_64 (2 << 13)
#define VEC_CONFIG0_CBURST_GAIN_1_32 (3 << 13)
#define VEC_CONFIG0_CHRBW1 BIT(11)
#define VEC_CONFIG0_CHRBW0 BIT(10)
#define VEC_CONFIG0_SYNCDIS BIT(9)
#define VEC_CONFIG0_BURDIS BIT(8)
#define VEC_CONFIG0_CHRDIS BIT(7)
#define VEC_CONFIG0_PDEN BIT(6)
#define VEC_CONFIG0_YCDELAY BIT(4)
#define VEC_CONFIG0_RAMPEN BIT(2)
#define VEC_CONFIG0_YCDIS BIT(2)
#define VEC_CONFIG0_STD_MASK GENMASK(1, 0)
#define VEC_CONFIG0_NTSC_STD 0
#define VEC_CONFIG0_PAL_BDGHI_STD 1
#define VEC_CONFIG0_PAL_N_STD 3
#define VEC_SCHPH 0x108
#define VEC_SOFT_RESET 0x10c
#define VEC_CLMP0_START 0x144
#define VEC_CLMP0_END 0x148
#define VEC_FREQ3_2 0x180
#define VEC_FREQ1_0 0x184
#define VEC_CONFIG1 0x188
#define VEC_CONFIG_VEC_RESYNC_OFF BIT(18)
#define VEC_CONFIG_RGB219 BIT(17)
#define VEC_CONFIG_CBAR_EN BIT(16)
#define VEC_CONFIG_TC_OBB BIT(15)
#define VEC_CONFIG1_OUTPUT_MODE_MASK GENMASK(12, 10)
#define VEC_CONFIG1_C_Y_CVBS (0 << 10)
#define VEC_CONFIG1_CVBS_Y_C (1 << 10)
#define VEC_CONFIG1_PR_Y_PB (2 << 10)
#define VEC_CONFIG1_RGB (4 << 10)
#define VEC_CONFIG1_Y_C_CVBS (5 << 10)
#define VEC_CONFIG1_C_CVBS_Y (6 << 10)
#define VEC_CONFIG1_C_CVBS_CVBS (7 << 10)
#define VEC_CONFIG1_DIS_CHR BIT(9)
#define VEC_CONFIG1_DIS_LUMA BIT(8)
#define VEC_CONFIG1_YCBCR_IN BIT(6)
#define VEC_CONFIG1_DITHER_TYPE_LFSR 0
#define VEC_CONFIG1_DITHER_TYPE_COUNTER BIT(5)
#define VEC_CONFIG1_DITHER_EN BIT(4)
#define VEC_CONFIG1_CYDELAY BIT(3)
#define VEC_CONFIG1_LUMADIS BIT(2)
#define VEC_CONFIG1_COMPDIS BIT(1)
#define VEC_CONFIG1_CUSTOM_FREQ BIT(0)
#define VEC_CONFIG2 0x18c
#define VEC_CONFIG2_PROG_SCAN BIT(15)
#define VEC_CONFIG2_SYNC_ADJ_MASK GENMASK(14, 12)
#define VEC_CONFIG2_SYNC_ADJ(x) (((x) / 2) << 12)
#define VEC_CONFIG2_PBPR_EN BIT(10)
#define VEC_CONFIG2_UV_DIG_DIS BIT(6)
#define VEC_CONFIG2_RGB_DIG_DIS BIT(5)
#define VEC_CONFIG2_TMUX_MASK GENMASK(3, 2)
#define VEC_CONFIG2_TMUX_DRIVE0 (0 << 2)
#define VEC_CONFIG2_TMUX_RG_COMP (1 << 2)
#define VEC_CONFIG2_TMUX_UV_YC (2 << 2)
#define VEC_CONFIG2_TMUX_SYNC_YC (3 << 2)
#define VEC_INTERRUPT_CONTROL 0x190
#define VEC_INTERRUPT_STATUS 0x194
#define VEC_FCW_SECAM_B 0x198
#define VEC_SECAM_GAIN_VAL 0x19c
#define VEC_CONFIG3 0x1a0
#define VEC_CONFIG3_HORIZ_LEN_STD (0 << 0)
#define VEC_CONFIG3_HORIZ_LEN_MPEG1_SIF (1 << 0)
#define VEC_CONFIG3_SHAPE_NON_LINEAR BIT(1)
#define VEC_STATUS0 0x200
#define VEC_MASK0 0x204
#define VEC_CFG 0x208
#define VEC_CFG_SG_MODE_MASK GENMASK(6, 5)
#define VEC_CFG_SG_MODE(x) ((x) << 5)
#define VEC_CFG_SG_EN BIT(4)
#define VEC_CFG_VEC_EN BIT(3)
#define VEC_CFG_MB_EN BIT(2)
#define VEC_CFG_ENABLE BIT(1)
#define VEC_CFG_TB_EN BIT(0)
#define VEC_DAC_TEST 0x20c
#define VEC_DAC_CONFIG 0x210
#define VEC_DAC_CONFIG_LDO_BIAS_CTRL(x) ((x) << 24)
#define VEC_DAC_CONFIG_DRIVER_CTRL(x) ((x) << 16)
#define VEC_DAC_CONFIG_DAC_CTRL(x) (x)
#define VEC_DAC_MISC 0x214
#define VEC_DAC_MISC_VCD_CTRL_MASK GENMASK(31, 16)
#define VEC_DAC_MISC_VCD_CTRL(x) ((x) << 16)
#define VEC_DAC_MISC_VID_ACT BIT(8)
#define VEC_DAC_MISC_VCD_PWRDN BIT(6)
#define VEC_DAC_MISC_BIAS_PWRDN BIT(5)
#define VEC_DAC_MISC_DAC_PWRDN BIT(2)
#define VEC_DAC_MISC_LDO_PWRDN BIT(1)
#define VEC_DAC_MISC_DAC_RST_N BIT(0)
struct vc4_vec_variant {
u32 dac_config;
};
/* General VEC hardware state. */
struct vc4_vec {
struct vc4_encoder encoder;
struct drm_connector connector;
struct platform_device *pdev;
const struct vc4_vec_variant *variant;
void __iomem *regs;
struct clk *clock;
struct debugfs_regset32 regset;
};
#define VEC_READ(offset) readl(vec->regs + (offset))
#define VEC_WRITE(offset, val) writel(val, vec->regs + (offset))
static inline struct vc4_vec *
encoder_to_vc4_vec(struct drm_encoder *encoder)
{
return container_of(encoder, struct vc4_vec, encoder.base);
}
enum vc4_vec_tv_mode_id {
VC4_VEC_TV_MODE_NTSC,
VC4_VEC_TV_MODE_NTSC_J,
VC4_VEC_TV_MODE_PAL,
VC4_VEC_TV_MODE_PAL_M,
};
struct vc4_vec_tv_mode {
const struct drm_display_mode *mode;
u32 config0;
u32 config1;
u32 custom_freq;
};
static const struct debugfs_reg32 vec_regs[] = {
VC4_REG32(VEC_WSE_CONTROL),
VC4_REG32(VEC_WSE_WSS_DATA),
VC4_REG32(VEC_WSE_VPS_DATA1),
VC4_REG32(VEC_WSE_VPS_CONTROL),
VC4_REG32(VEC_REVID),
VC4_REG32(VEC_CONFIG0),
VC4_REG32(VEC_SCHPH),
VC4_REG32(VEC_CLMP0_START),
VC4_REG32(VEC_CLMP0_END),
VC4_REG32(VEC_FREQ3_2),
VC4_REG32(VEC_FREQ1_0),
VC4_REG32(VEC_CONFIG1),
VC4_REG32(VEC_CONFIG2),
VC4_REG32(VEC_INTERRUPT_CONTROL),
VC4_REG32(VEC_INTERRUPT_STATUS),
VC4_REG32(VEC_FCW_SECAM_B),
VC4_REG32(VEC_SECAM_GAIN_VAL),
VC4_REG32(VEC_CONFIG3),
VC4_REG32(VEC_STATUS0),
VC4_REG32(VEC_MASK0),
VC4_REG32(VEC_CFG),
VC4_REG32(VEC_DAC_TEST),
VC4_REG32(VEC_DAC_CONFIG),
VC4_REG32(VEC_DAC_MISC),
};
static const struct drm_display_mode ntsc_mode = {
DRM_MODE("720x480", DRM_MODE_TYPE_DRIVER, 13500,
720, 720 + 14, 720 + 14 + 64, 720 + 14 + 64 + 60, 0,
480, 480 + 7, 480 + 7 + 6, 525, 0,
DRM_MODE_FLAG_INTERLACE)
};
static const struct drm_display_mode pal_mode = {
DRM_MODE("720x576", DRM_MODE_TYPE_DRIVER, 13500,
720, 720 + 20, 720 + 20 + 64, 720 + 20 + 64 + 60, 0,
576, 576 + 4, 576 + 4 + 6, 625, 0,
DRM_MODE_FLAG_INTERLACE)
};
static const struct vc4_vec_tv_mode vc4_vec_tv_modes[] = {
[VC4_VEC_TV_MODE_NTSC] = {
.mode = &ntsc_mode,
.config0 = VEC_CONFIG0_NTSC_STD | VEC_CONFIG0_PDEN,
.config1 = VEC_CONFIG1_C_CVBS_CVBS,
},
[VC4_VEC_TV_MODE_NTSC_J] = {
.mode = &ntsc_mode,
.config0 = VEC_CONFIG0_NTSC_STD,
.config1 = VEC_CONFIG1_C_CVBS_CVBS,
},
[VC4_VEC_TV_MODE_PAL] = {
.mode = &pal_mode,
.config0 = VEC_CONFIG0_PAL_BDGHI_STD,
.config1 = VEC_CONFIG1_C_CVBS_CVBS,
},
[VC4_VEC_TV_MODE_PAL_M] = {
.mode = &pal_mode,
.config0 = VEC_CONFIG0_PAL_BDGHI_STD,
.config1 = VEC_CONFIG1_C_CVBS_CVBS | VEC_CONFIG1_CUSTOM_FREQ,
.custom_freq = 0x223b61d1,
},
};
static enum drm_connector_status
vc4_vec_connector_detect(struct drm_connector *connector, bool force)
{
return connector_status_unknown;
}
static int vc4_vec_connector_get_modes(struct drm_connector *connector)
{
struct drm_connector_state *state = connector->state;
struct drm_display_mode *mode;
mode = drm_mode_duplicate(connector->dev,
vc4_vec_tv_modes[state->tv.mode].mode);
if (!mode) {
DRM_ERROR("Failed to create a new display mode\n");
return -ENOMEM;
}
drm_mode_probed_add(connector, mode);
return 1;
}
static const struct drm_connector_funcs vc4_vec_connector_funcs = {
.detect = vc4_vec_connector_detect,
.fill_modes = drm_helper_probe_single_connector_modes,
.reset = drm_atomic_helper_connector_reset,
.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
};
static const struct drm_connector_helper_funcs vc4_vec_connector_helper_funcs = {
.get_modes = vc4_vec_connector_get_modes,
};
static int vc4_vec_connector_init(struct drm_device *dev, struct vc4_vec *vec)
{
struct drm_connector *connector = &vec->connector;
int ret;
connector->interlace_allowed = true;
ret = drmm_connector_init(dev, connector, &vc4_vec_connector_funcs,
DRM_MODE_CONNECTOR_Composite, NULL);
if (ret)
return ret;
drm_connector_helper_add(connector, &vc4_vec_connector_helper_funcs);
drm_object_attach_property(&connector->base,
dev->mode_config.tv_mode_property,
VC4_VEC_TV_MODE_NTSC);
drm_connector_attach_encoder(connector, &vec->encoder.base);
return 0;
}
static void vc4_vec_encoder_disable(struct drm_encoder *encoder,
struct drm_atomic_state *state)
{
struct drm_device *drm = encoder->dev;
struct vc4_vec *vec = encoder_to_vc4_vec(encoder);
int idx, ret;
if (!drm_dev_enter(drm, &idx))
return;
VEC_WRITE(VEC_CFG, 0);
VEC_WRITE(VEC_DAC_MISC,
VEC_DAC_MISC_VCD_PWRDN |
VEC_DAC_MISC_BIAS_PWRDN |
VEC_DAC_MISC_DAC_PWRDN |
VEC_DAC_MISC_LDO_PWRDN);
clk_disable_unprepare(vec->clock);
ret = pm_runtime_put(&vec->pdev->dev);
if (ret < 0) {
DRM_ERROR("Failed to release power domain: %d\n", ret);
goto err_dev_exit;
}
drm_dev_exit(idx);
return;
err_dev_exit:
drm_dev_exit(idx);
}
static void vc4_vec_encoder_enable(struct drm_encoder *encoder,
struct drm_atomic_state *state)
{
struct drm_device *drm = encoder->dev;
struct vc4_vec *vec = encoder_to_vc4_vec(encoder);
struct drm_connector *connector = &vec->connector;
struct drm_connector_state *conn_state =
drm_atomic_get_new_connector_state(state, connector);
const struct vc4_vec_tv_mode *tv_mode =
&vc4_vec_tv_modes[conn_state->tv.mode];
int idx, ret;
if (!drm_dev_enter(drm, &idx))
return;
ret = pm_runtime_get_sync(&vec->pdev->dev);
if (ret < 0) {
DRM_ERROR("Failed to retain power domain: %d\n", ret);
goto err_dev_exit;
}
/*
* We need to set the clock rate each time we enable the encoder
* because there's a chance we share the same parent with the HDMI
* clock, and both drivers are requesting different rates.
* The good news is, these 2 encoders cannot be enabled at the same
* time, thus preventing incompatible rate requests.
*/
ret = clk_set_rate(vec->clock, 108000000);
if (ret) {
DRM_ERROR("Failed to set clock rate: %d\n", ret);
goto err_put_runtime_pm;
}
ret = clk_prepare_enable(vec->clock);
if (ret) {
DRM_ERROR("Failed to turn on core clock: %d\n", ret);
goto err_put_runtime_pm;
}
/* Reset the different blocks */
VEC_WRITE(VEC_WSE_RESET, 1);
VEC_WRITE(VEC_SOFT_RESET, 1);
/* Disable the CGSM-A and WSE blocks */
VEC_WRITE(VEC_WSE_CONTROL, 0);
/* Write config common to all modes. */
/*
* Color subcarrier phase: phase = 360 * SCHPH / 256.
* 0x28 <=> 39.375 deg.
*/
VEC_WRITE(VEC_SCHPH, 0x28);
/*
* Reset to default values.
*/
VEC_WRITE(VEC_CLMP0_START, 0xac);
VEC_WRITE(VEC_CLMP0_END, 0xec);
VEC_WRITE(VEC_CONFIG2,
VEC_CONFIG2_UV_DIG_DIS | VEC_CONFIG2_RGB_DIG_DIS);
VEC_WRITE(VEC_CONFIG3, VEC_CONFIG3_HORIZ_LEN_STD);
VEC_WRITE(VEC_DAC_CONFIG, vec->variant->dac_config);
/* Mask all interrupts. */
VEC_WRITE(VEC_MASK0, 0);
VEC_WRITE(VEC_CONFIG0, tv_mode->config0);
VEC_WRITE(VEC_CONFIG1, tv_mode->config1);
if (tv_mode->custom_freq) {
VEC_WRITE(VEC_FREQ3_2,
(tv_mode->custom_freq >> 16) & 0xffff);
VEC_WRITE(VEC_FREQ1_0,
tv_mode->custom_freq & 0xffff);
}
VEC_WRITE(VEC_DAC_MISC,
VEC_DAC_MISC_VID_ACT | VEC_DAC_MISC_DAC_RST_N);
VEC_WRITE(VEC_CFG, VEC_CFG_VEC_EN);
drm_dev_exit(idx);
return;
err_put_runtime_pm:
pm_runtime_put(&vec->pdev->dev);
err_dev_exit:
drm_dev_exit(idx);
}
static int vc4_vec_encoder_atomic_check(struct drm_encoder *encoder,
struct drm_crtc_state *crtc_state,
struct drm_connector_state *conn_state)
{
const struct vc4_vec_tv_mode *vec_mode;
vec_mode = &vc4_vec_tv_modes[conn_state->tv.mode];
if (conn_state->crtc &&
!drm_mode_equal(vec_mode->mode, &crtc_state->adjusted_mode))
return -EINVAL;
return 0;
}
static const struct drm_encoder_helper_funcs vc4_vec_encoder_helper_funcs = {
.atomic_check = vc4_vec_encoder_atomic_check,
.atomic_disable = vc4_vec_encoder_disable,
.atomic_enable = vc4_vec_encoder_enable,
};
static int vc4_vec_late_register(struct drm_encoder *encoder)
{
struct drm_device *drm = encoder->dev;
struct vc4_vec *vec = encoder_to_vc4_vec(encoder);
int ret;
ret = vc4_debugfs_add_regset32(drm->primary, "vec_regs",
&vec->regset);
if (ret)
return ret;
return 0;
}
static const struct drm_encoder_funcs vc4_vec_encoder_funcs = {
.late_register = vc4_vec_late_register,
};
static const struct vc4_vec_variant bcm2835_vec_variant = {
.dac_config = VEC_DAC_CONFIG_DAC_CTRL(0xc) |
VEC_DAC_CONFIG_DRIVER_CTRL(0xc) |
VEC_DAC_CONFIG_LDO_BIAS_CTRL(0x46)
};
static const struct vc4_vec_variant bcm2711_vec_variant = {
.dac_config = VEC_DAC_CONFIG_DAC_CTRL(0x0) |
VEC_DAC_CONFIG_DRIVER_CTRL(0x80) |
VEC_DAC_CONFIG_LDO_BIAS_CTRL(0x61)
};
static const struct of_device_id vc4_vec_dt_match[] = {
{ .compatible = "brcm,bcm2835-vec", .data = &bcm2835_vec_variant },
{ .compatible = "brcm,bcm2711-vec", .data = &bcm2711_vec_variant },
{ /* sentinel */ },
};
static const char * const tv_mode_names[] = {
[VC4_VEC_TV_MODE_NTSC] = "NTSC",
[VC4_VEC_TV_MODE_NTSC_J] = "NTSC-J",
[VC4_VEC_TV_MODE_PAL] = "PAL",
[VC4_VEC_TV_MODE_PAL_M] = "PAL-M",
};
static int vc4_vec_bind(struct device *dev, struct device *master, void *data)
{
struct platform_device *pdev = to_platform_device(dev);
struct drm_device *drm = dev_get_drvdata(master);
struct vc4_vec *vec;
int ret;
ret = drm_mode_create_tv_properties(drm, ARRAY_SIZE(tv_mode_names),
tv_mode_names);
if (ret)
return ret;
vec = drmm_kzalloc(drm, sizeof(*vec), GFP_KERNEL);
if (!vec)
return -ENOMEM;
vec->encoder.type = VC4_ENCODER_TYPE_VEC;
vec->pdev = pdev;
vec->variant = (const struct vc4_vec_variant *)
of_device_get_match_data(dev);
vec->regs = vc4_ioremap_regs(pdev, 0);
if (IS_ERR(vec->regs))
return PTR_ERR(vec->regs);
vec->regset.base = vec->regs;
vec->regset.regs = vec_regs;
vec->regset.nregs = ARRAY_SIZE(vec_regs);
vec->clock = devm_clk_get(dev, NULL);
if (IS_ERR(vec->clock)) {
ret = PTR_ERR(vec->clock);
if (ret != -EPROBE_DEFER)
DRM_ERROR("Failed to get clock: %d\n", ret);
return ret;
}
ret = devm_pm_runtime_enable(dev);
if (ret)
return ret;
ret = drmm_encoder_init(drm, &vec->encoder.base,
&vc4_vec_encoder_funcs,
DRM_MODE_ENCODER_TVDAC,
NULL);
if (ret)
return ret;
drm_encoder_helper_add(&vec->encoder.base, &vc4_vec_encoder_helper_funcs);
ret = vc4_vec_connector_init(drm, vec);
if (ret)
return ret;
dev_set_drvdata(dev, vec);
return 0;
}
static const struct component_ops vc4_vec_ops = {
.bind = vc4_vec_bind,
};
static int vc4_vec_dev_probe(struct platform_device *pdev)
{
return component_add(&pdev->dev, &vc4_vec_ops);
}
static int vc4_vec_dev_remove(struct platform_device *pdev)
{
component_del(&pdev->dev, &vc4_vec_ops);
return 0;
}
struct platform_driver vc4_vec_driver = {
.probe = vc4_vec_dev_probe,
.remove = vc4_vec_dev_remove,
.driver = {
.name = "vc4_vec",
.of_match_table = vc4_vec_dt_match,
},
};