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linux/drivers/gpu/drm/vc4/vc4_vec.c
Eric Anholt f6c01530fd drm/vc4: Extend and edit documentation for output from the RST 
I had written most of my comments as if I was describing the
individual code files the way I used to for doxygen, while for RST we
want to describe things in a more chapter/section way where there's no
obvious relation to .c files.

Additionally, several of the files had stub descriptions that I've
taken this opportunity to extend.

Signed-off-by: Eric Anholt <eric@anholt.net>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170227201144.10970-4-eric@anholt.net
2017-02-28 12:51:49 -08:00

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/*
* Copyright (C) 2016 Broadcom
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* 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_crtc_helper.h>
#include <drm/drm_edid.h>
#include <drm/drm_panel.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)
/* General VEC hardware state. */
struct vc4_vec {
struct platform_device *pdev;
struct drm_encoder *encoder;
struct drm_connector *connector;
void __iomem *regs;
struct clk *clock;
const struct vc4_vec_tv_mode *tv_mode;
};
#define VEC_READ(offset) readl(vec->regs + (offset))
#define VEC_WRITE(offset, val) writel(val, vec->regs + (offset))
/* VC4 VEC encoder KMS struct */
struct vc4_vec_encoder {
struct vc4_encoder base;
struct vc4_vec *vec;
};
static inline struct vc4_vec_encoder *
to_vc4_vec_encoder(struct drm_encoder *encoder)
{
return container_of(encoder, struct vc4_vec_encoder, base.base);
}
/* VC4 VEC connector KMS struct */
struct vc4_vec_connector {
struct drm_connector base;
struct vc4_vec *vec;
/* Since the connector is attached to just the one encoder,
* this is the reference to it so we can do the best_encoder()
* hook.
*/
struct drm_encoder *encoder;
};
static inline struct vc4_vec_connector *
to_vc4_vec_connector(struct drm_connector *connector)
{
return container_of(connector, struct vc4_vec_connector, 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;
void (*mode_set)(struct vc4_vec *vec);
};
#define VEC_REG(reg) { reg, #reg }
static const struct {
u32 reg;
const char *name;
} vec_regs[] = {
VEC_REG(VEC_WSE_CONTROL),
VEC_REG(VEC_WSE_WSS_DATA),
VEC_REG(VEC_WSE_VPS_DATA1),
VEC_REG(VEC_WSE_VPS_CONTROL),
VEC_REG(VEC_REVID),
VEC_REG(VEC_CONFIG0),
VEC_REG(VEC_SCHPH),
VEC_REG(VEC_CLMP0_START),
VEC_REG(VEC_CLMP0_END),
VEC_REG(VEC_FREQ3_2),
VEC_REG(VEC_FREQ1_0),
VEC_REG(VEC_CONFIG1),
VEC_REG(VEC_CONFIG2),
VEC_REG(VEC_INTERRUPT_CONTROL),
VEC_REG(VEC_INTERRUPT_STATUS),
VEC_REG(VEC_FCW_SECAM_B),
VEC_REG(VEC_SECAM_GAIN_VAL),
VEC_REG(VEC_CONFIG3),
VEC_REG(VEC_STATUS0),
VEC_REG(VEC_MASK0),
VEC_REG(VEC_CFG),
VEC_REG(VEC_DAC_TEST),
VEC_REG(VEC_DAC_CONFIG),
VEC_REG(VEC_DAC_MISC),
};
#ifdef CONFIG_DEBUG_FS
int vc4_vec_debugfs_regs(struct seq_file *m, void *unused)
{
struct drm_info_node *node = (struct drm_info_node *)m->private;
struct drm_device *dev = node->minor->dev;
struct vc4_dev *vc4 = to_vc4_dev(dev);
struct vc4_vec *vec = vc4->vec;
int i;
if (!vec)
return 0;
for (i = 0; i < ARRAY_SIZE(vec_regs); i++) {
seq_printf(m, "%s (0x%04x): 0x%08x\n",
vec_regs[i].name, vec_regs[i].reg,
VEC_READ(vec_regs[i].reg));
}
return 0;
}
#endif
static void vc4_vec_ntsc_mode_set(struct vc4_vec *vec)
{
VEC_WRITE(VEC_CONFIG0, VEC_CONFIG0_NTSC_STD | VEC_CONFIG0_PDEN);
VEC_WRITE(VEC_CONFIG1, VEC_CONFIG1_C_CVBS_CVBS);
}
static void vc4_vec_ntsc_j_mode_set(struct vc4_vec *vec)
{
VEC_WRITE(VEC_CONFIG0, VEC_CONFIG0_NTSC_STD);
VEC_WRITE(VEC_CONFIG1, VEC_CONFIG1_C_CVBS_CVBS);
}
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 + 3, 480 + 3 + 3, 480 + 3 + 3 + 16, 0,
DRM_MODE_FLAG_INTERLACE)
};
static void vc4_vec_pal_mode_set(struct vc4_vec *vec)
{
VEC_WRITE(VEC_CONFIG0, VEC_CONFIG0_PAL_BDGHI_STD);
VEC_WRITE(VEC_CONFIG1, VEC_CONFIG1_C_CVBS_CVBS);
}
static void vc4_vec_pal_m_mode_set(struct vc4_vec *vec)
{
VEC_WRITE(VEC_CONFIG0, VEC_CONFIG0_PAL_BDGHI_STD);
VEC_WRITE(VEC_CONFIG1,
VEC_CONFIG1_C_CVBS_CVBS | VEC_CONFIG1_CUSTOM_FREQ);
VEC_WRITE(VEC_FREQ3_2, 0x223b);
VEC_WRITE(VEC_FREQ1_0, 0x61d1);
}
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 + 2, 576 + 2 + 3, 576 + 2 + 3 + 20, 0,
DRM_MODE_FLAG_INTERLACE)
};
static const struct vc4_vec_tv_mode vc4_vec_tv_modes[] = {
[VC4_VEC_TV_MODE_NTSC] = {
.mode = &ntsc_mode,
.mode_set = vc4_vec_ntsc_mode_set,
},
[VC4_VEC_TV_MODE_NTSC_J] = {
.mode = &ntsc_mode,
.mode_set = vc4_vec_ntsc_j_mode_set,
},
[VC4_VEC_TV_MODE_PAL] = {
.mode = &pal_mode,
.mode_set = vc4_vec_pal_mode_set,
},
[VC4_VEC_TV_MODE_PAL_M] = {
.mode = &pal_mode,
.mode_set = vc4_vec_pal_m_mode_set,
},
};
static enum drm_connector_status
vc4_vec_connector_detect(struct drm_connector *connector, bool force)
{
return connector_status_unknown;
}
static void vc4_vec_connector_destroy(struct drm_connector *connector)
{
drm_connector_unregister(connector);
drm_connector_cleanup(connector);
}
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 = {
.dpms = drm_atomic_helper_connector_dpms,
.detect = vc4_vec_connector_detect,
.fill_modes = drm_helper_probe_single_connector_modes,
.set_property = drm_atomic_helper_connector_set_property,
.destroy = vc4_vec_connector_destroy,
.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 struct drm_connector *vc4_vec_connector_init(struct drm_device *dev,
struct vc4_vec *vec)
{
struct drm_connector *connector = NULL;
struct vc4_vec_connector *vec_connector;
vec_connector = devm_kzalloc(dev->dev, sizeof(*vec_connector),
GFP_KERNEL);
if (!vec_connector)
return ERR_PTR(-ENOMEM);
connector = &vec_connector->base;
connector->interlace_allowed = true;
vec_connector->encoder = vec->encoder;
vec_connector->vec = vec;
drm_connector_init(dev, connector, &vc4_vec_connector_funcs,
DRM_MODE_CONNECTOR_Composite);
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);
vec->tv_mode = &vc4_vec_tv_modes[VC4_VEC_TV_MODE_NTSC];
drm_mode_connector_attach_encoder(connector, vec->encoder);
return connector;
}
static const struct drm_encoder_funcs vc4_vec_encoder_funcs = {
.destroy = drm_encoder_cleanup,
};
static void vc4_vec_encoder_disable(struct drm_encoder *encoder)
{
struct vc4_vec_encoder *vc4_vec_encoder = to_vc4_vec_encoder(encoder);
struct vc4_vec *vec = vc4_vec_encoder->vec;
int ret;
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);
return;
}
}
static void vc4_vec_encoder_enable(struct drm_encoder *encoder)
{
struct vc4_vec_encoder *vc4_vec_encoder = to_vc4_vec_encoder(encoder);
struct vc4_vec *vec = vc4_vec_encoder->vec;
int ret;
ret = pm_runtime_get_sync(&vec->pdev->dev);
if (ret < 0) {
DRM_ERROR("Failed to retain power domain: %d\n", ret);
return;
}
/*
* 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);
return;
}
ret = clk_prepare_enable(vec->clock);
if (ret) {
DRM_ERROR("Failed to turn on core clock: %d\n", ret);
return;
}
/* 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_DAC_CONFIG_DAC_CTRL(0xc) |
VEC_DAC_CONFIG_DRIVER_CTRL(0xc) |
VEC_DAC_CONFIG_LDO_BIAS_CTRL(0x46));
/* Mask all interrupts. */
VEC_WRITE(VEC_MASK0, 0);
vec->tv_mode->mode_set(vec);
VEC_WRITE(VEC_DAC_MISC,
VEC_DAC_MISC_VID_ACT | VEC_DAC_MISC_DAC_RST_N);
VEC_WRITE(VEC_CFG, VEC_CFG_VEC_EN);
}
static bool vc4_vec_encoder_mode_fixup(struct drm_encoder *encoder,
const struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
return true;
}
static void vc4_vec_encoder_atomic_mode_set(struct drm_encoder *encoder,
struct drm_crtc_state *crtc_state,
struct drm_connector_state *conn_state)
{
struct vc4_vec_encoder *vc4_vec_encoder = to_vc4_vec_encoder(encoder);
struct vc4_vec *vec = vc4_vec_encoder->vec;
vec->tv_mode = &vc4_vec_tv_modes[conn_state->tv.mode];
}
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 = {
.disable = vc4_vec_encoder_disable,
.enable = vc4_vec_encoder_enable,
.mode_fixup = vc4_vec_encoder_mode_fixup,
.atomic_check = vc4_vec_encoder_atomic_check,
.atomic_mode_set = vc4_vec_encoder_atomic_mode_set,
};
static const struct of_device_id vc4_vec_dt_match[] = {
{ .compatible = "brcm,bcm2835-vec", .data = NULL },
{ /* 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_dev *vc4 = to_vc4_dev(drm);
struct vc4_vec *vec;
struct vc4_vec_encoder *vc4_vec_encoder;
int ret;
ret = drm_mode_create_tv_properties(drm, ARRAY_SIZE(tv_mode_names),
tv_mode_names);
if (ret)
return ret;
vec = devm_kzalloc(dev, sizeof(*vec), GFP_KERNEL);
if (!vec)
return -ENOMEM;
vc4_vec_encoder = devm_kzalloc(dev, sizeof(*vc4_vec_encoder),
GFP_KERNEL);
if (!vc4_vec_encoder)
return -ENOMEM;
vc4_vec_encoder->base.type = VC4_ENCODER_TYPE_VEC;
vc4_vec_encoder->vec = vec;
vec->encoder = &vc4_vec_encoder->base.base;
vec->pdev = pdev;
vec->regs = vc4_ioremap_regs(pdev, 0);
if (IS_ERR(vec->regs))
return PTR_ERR(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;
}
pm_runtime_enable(dev);
drm_encoder_init(drm, vec->encoder, &vc4_vec_encoder_funcs,
DRM_MODE_ENCODER_TVDAC, NULL);
drm_encoder_helper_add(vec->encoder, &vc4_vec_encoder_helper_funcs);
vec->connector = vc4_vec_connector_init(drm, vec);
if (IS_ERR(vec->connector)) {
ret = PTR_ERR(vec->connector);
goto err_destroy_encoder;
}
dev_set_drvdata(dev, vec);
vc4->vec = vec;
return 0;
err_destroy_encoder:
drm_encoder_cleanup(vec->encoder);
pm_runtime_disable(dev);
return ret;
}
static void vc4_vec_unbind(struct device *dev, struct device *master,
void *data)
{
struct drm_device *drm = dev_get_drvdata(master);
struct vc4_dev *vc4 = to_vc4_dev(drm);
struct vc4_vec *vec = dev_get_drvdata(dev);
vc4_vec_connector_destroy(vec->connector);
drm_encoder_cleanup(vec->encoder);
pm_runtime_disable(dev);
vc4->vec = NULL;
}
static const struct component_ops vc4_vec_ops = {
.bind = vc4_vec_bind,
.unbind = vc4_vec_unbind,
};
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,
},
};
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