UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity
OpenCloudOS-Kernel/drivers/gpu/drm/mediatek/mtk_dpi.c

765 lines
19 KiB
C
Raw Blame History

/*
* Copyright (c) 2014 MediaTek Inc.
* Author: Jie Qiu <jie.qiu@mediatek.com>
*
* 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.
*/
#include <drm/drmP.h>
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
#include <linux/kernel.h>
#include <linux/component.h>
#include <linux/platform_device.h>
#include <linux/of.h>
#include <linux/of_graph.h>
#include <linux/interrupt.h>
#include <linux/types.h>
#include <linux/clk.h>
#include "mtk_dpi_regs.h"
#include "mtk_drm_ddp_comp.h"
enum mtk_dpi_out_bit_num {
MTK_DPI_OUT_BIT_NUM_8BITS,
MTK_DPI_OUT_BIT_NUM_10BITS,
MTK_DPI_OUT_BIT_NUM_12BITS,
MTK_DPI_OUT_BIT_NUM_16BITS
};
enum mtk_dpi_out_yc_map {
MTK_DPI_OUT_YC_MAP_RGB,
MTK_DPI_OUT_YC_MAP_CYCY,
MTK_DPI_OUT_YC_MAP_YCYC,
MTK_DPI_OUT_YC_MAP_CY,
MTK_DPI_OUT_YC_MAP_YC
};
enum mtk_dpi_out_channel_swap {
MTK_DPI_OUT_CHANNEL_SWAP_RGB,
MTK_DPI_OUT_CHANNEL_SWAP_GBR,
MTK_DPI_OUT_CHANNEL_SWAP_BRG,
MTK_DPI_OUT_CHANNEL_SWAP_RBG,
MTK_DPI_OUT_CHANNEL_SWAP_GRB,
MTK_DPI_OUT_CHANNEL_SWAP_BGR
};
enum mtk_dpi_out_color_format {
MTK_DPI_COLOR_FORMAT_RGB,
MTK_DPI_COLOR_FORMAT_RGB_FULL,
MTK_DPI_COLOR_FORMAT_YCBCR_444,
MTK_DPI_COLOR_FORMAT_YCBCR_422,
MTK_DPI_COLOR_FORMAT_XV_YCC,
MTK_DPI_COLOR_FORMAT_YCBCR_444_FULL,
MTK_DPI_COLOR_FORMAT_YCBCR_422_FULL
};
struct mtk_dpi {
struct mtk_ddp_comp ddp_comp;
struct drm_encoder encoder;
void __iomem *regs;
struct device *dev;
struct clk *engine_clk;
struct clk *pixel_clk;
struct clk *tvd_clk;
int irq;
struct drm_display_mode mode;
enum mtk_dpi_out_color_format color_format;
enum mtk_dpi_out_yc_map yc_map;
enum mtk_dpi_out_bit_num bit_num;
enum mtk_dpi_out_channel_swap channel_swap;
bool power_sta;
u8 power_ctl;
};
static inline struct mtk_dpi *mtk_dpi_from_encoder(struct drm_encoder *e)
{
return container_of(e, struct mtk_dpi, encoder);
}
enum mtk_dpi_polarity {
MTK_DPI_POLARITY_RISING,
MTK_DPI_POLARITY_FALLING,
};
enum mtk_dpi_power_ctl {
DPI_POWER_START = BIT(0),
DPI_POWER_ENABLE = BIT(1),
};
struct mtk_dpi_polarities {
enum mtk_dpi_polarity de_pol;
enum mtk_dpi_polarity ck_pol;
enum mtk_dpi_polarity hsync_pol;
enum mtk_dpi_polarity vsync_pol;
};
struct mtk_dpi_sync_param {
u32 sync_width;
u32 front_porch;
u32 back_porch;
bool shift_half_line;
};
struct mtk_dpi_yc_limit {
u16 y_top;
u16 y_bottom;
u16 c_top;
u16 c_bottom;
};
static void mtk_dpi_mask(struct mtk_dpi *dpi, u32 offset, u32 val, u32 mask)
{
u32 tmp = readl(dpi->regs + offset) & ~mask;
tmp |= (val & mask);
writel(tmp, dpi->regs + offset);
}
static void mtk_dpi_sw_reset(struct mtk_dpi *dpi, bool reset)
{
mtk_dpi_mask(dpi, DPI_RET, reset ? RST : 0, RST);
}
static void mtk_dpi_enable(struct mtk_dpi *dpi)
{
mtk_dpi_mask(dpi, DPI_EN, EN, EN);
}
static void mtk_dpi_disable(struct mtk_dpi *dpi)
{
mtk_dpi_mask(dpi, DPI_EN, 0, EN);
}
static void mtk_dpi_config_hsync(struct mtk_dpi *dpi,
struct mtk_dpi_sync_param *sync)
{
mtk_dpi_mask(dpi, DPI_TGEN_HWIDTH,
sync->sync_width << HPW, HPW_MASK);
mtk_dpi_mask(dpi, DPI_TGEN_HPORCH,
sync->back_porch << HBP, HBP_MASK);
mtk_dpi_mask(dpi, DPI_TGEN_HPORCH, sync->front_porch << HFP,
HFP_MASK);
}
static void mtk_dpi_config_vsync(struct mtk_dpi *dpi,
struct mtk_dpi_sync_param *sync,
u32 width_addr, u32 porch_addr)
{
mtk_dpi_mask(dpi, width_addr,
sync->sync_width << VSYNC_WIDTH_SHIFT,
VSYNC_WIDTH_MASK);
mtk_dpi_mask(dpi, width_addr,
sync->shift_half_line << VSYNC_HALF_LINE_SHIFT,
VSYNC_HALF_LINE_MASK);
mtk_dpi_mask(dpi, porch_addr,
sync->back_porch << VSYNC_BACK_PORCH_SHIFT,
VSYNC_BACK_PORCH_MASK);
mtk_dpi_mask(dpi, porch_addr,
sync->front_porch << VSYNC_FRONT_PORCH_SHIFT,
VSYNC_FRONT_PORCH_MASK);
}
static void mtk_dpi_config_vsync_lodd(struct mtk_dpi *dpi,
struct mtk_dpi_sync_param *sync)
{
mtk_dpi_config_vsync(dpi, sync, DPI_TGEN_VWIDTH, DPI_TGEN_VPORCH);
}
static void mtk_dpi_config_vsync_leven(struct mtk_dpi *dpi,
struct mtk_dpi_sync_param *sync)
{
mtk_dpi_config_vsync(dpi, sync, DPI_TGEN_VWIDTH_LEVEN,
DPI_TGEN_VPORCH_LEVEN);
}
static void mtk_dpi_config_vsync_rodd(struct mtk_dpi *dpi,
struct mtk_dpi_sync_param *sync)
{
mtk_dpi_config_vsync(dpi, sync, DPI_TGEN_VWIDTH_RODD,
DPI_TGEN_VPORCH_RODD);
}
static void mtk_dpi_config_vsync_reven(struct mtk_dpi *dpi,
struct mtk_dpi_sync_param *sync)
{
mtk_dpi_config_vsync(dpi, sync, DPI_TGEN_VWIDTH_REVEN,
DPI_TGEN_VPORCH_REVEN);
}
static void mtk_dpi_config_pol(struct mtk_dpi *dpi,
struct mtk_dpi_polarities *dpi_pol)
{
unsigned int pol;
pol = (dpi_pol->ck_pol == MTK_DPI_POLARITY_RISING ? 0 : CK_POL) |
(dpi_pol->de_pol == MTK_DPI_POLARITY_RISING ? 0 : DE_POL) |
(dpi_pol->hsync_pol == MTK_DPI_POLARITY_RISING ? 0 : HSYNC_POL) |
(dpi_pol->vsync_pol == MTK_DPI_POLARITY_RISING ? 0 : VSYNC_POL);
mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING, pol,
CK_POL | DE_POL | HSYNC_POL | VSYNC_POL);
}
static void mtk_dpi_config_3d(struct mtk_dpi *dpi, bool en_3d)
{
mtk_dpi_mask(dpi, DPI_CON, en_3d ? TDFP_EN : 0, TDFP_EN);
}
static void mtk_dpi_config_interface(struct mtk_dpi *dpi, bool inter)
{
mtk_dpi_mask(dpi, DPI_CON, inter ? INTL_EN : 0, INTL_EN);
}
static void mtk_dpi_config_fb_size(struct mtk_dpi *dpi, u32 width, u32 height)
{
mtk_dpi_mask(dpi, DPI_SIZE, width << HSIZE, HSIZE_MASK);
mtk_dpi_mask(dpi, DPI_SIZE, height << VSIZE, VSIZE_MASK);
}
static void mtk_dpi_config_channel_limit(struct mtk_dpi *dpi,
struct mtk_dpi_yc_limit *limit)
{
mtk_dpi_mask(dpi, DPI_Y_LIMIT, limit->y_bottom << Y_LIMINT_BOT,
Y_LIMINT_BOT_MASK);
mtk_dpi_mask(dpi, DPI_Y_LIMIT, limit->y_top << Y_LIMINT_TOP,
Y_LIMINT_TOP_MASK);
mtk_dpi_mask(dpi, DPI_C_LIMIT, limit->c_bottom << C_LIMIT_BOT,
C_LIMIT_BOT_MASK);
mtk_dpi_mask(dpi, DPI_C_LIMIT, limit->c_top << C_LIMIT_TOP,
C_LIMIT_TOP_MASK);
}
static void mtk_dpi_config_bit_num(struct mtk_dpi *dpi,
enum mtk_dpi_out_bit_num num)
{
u32 val;
switch (num) {
case MTK_DPI_OUT_BIT_NUM_8BITS:
val = OUT_BIT_8;
break;
case MTK_DPI_OUT_BIT_NUM_10BITS:
val = OUT_BIT_10;
break;
case MTK_DPI_OUT_BIT_NUM_12BITS:
val = OUT_BIT_12;
break;
case MTK_DPI_OUT_BIT_NUM_16BITS:
val = OUT_BIT_16;
break;
default:
val = OUT_BIT_8;
break;
}
mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING, val << OUT_BIT,
OUT_BIT_MASK);
}
static void mtk_dpi_config_yc_map(struct mtk_dpi *dpi,
enum mtk_dpi_out_yc_map map)
{
u32 val;
switch (map) {
case MTK_DPI_OUT_YC_MAP_RGB:
val = YC_MAP_RGB;
break;
case MTK_DPI_OUT_YC_MAP_CYCY:
val = YC_MAP_CYCY;
break;
case MTK_DPI_OUT_YC_MAP_YCYC:
val = YC_MAP_YCYC;
break;
case MTK_DPI_OUT_YC_MAP_CY:
val = YC_MAP_CY;
break;
case MTK_DPI_OUT_YC_MAP_YC:
val = YC_MAP_YC;
break;
default:
val = YC_MAP_RGB;
break;
}
mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING, val << YC_MAP, YC_MAP_MASK);
}
static void mtk_dpi_config_channel_swap(struct mtk_dpi *dpi,
enum mtk_dpi_out_channel_swap swap)
{
u32 val;
switch (swap) {
case MTK_DPI_OUT_CHANNEL_SWAP_RGB:
val = SWAP_RGB;
break;
case MTK_DPI_OUT_CHANNEL_SWAP_GBR:
val = SWAP_GBR;
break;
case MTK_DPI_OUT_CHANNEL_SWAP_BRG:
val = SWAP_BRG;
break;
case MTK_DPI_OUT_CHANNEL_SWAP_RBG:
val = SWAP_RBG;
break;
case MTK_DPI_OUT_CHANNEL_SWAP_GRB:
val = SWAP_GRB;
break;
case MTK_DPI_OUT_CHANNEL_SWAP_BGR:
val = SWAP_BGR;
break;
default:
val = SWAP_RGB;
break;
}
mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING, val << CH_SWAP, CH_SWAP_MASK);
}
static void mtk_dpi_config_yuv422_enable(struct mtk_dpi *dpi, bool enable)
{
mtk_dpi_mask(dpi, DPI_CON, enable ? YUV422_EN : 0, YUV422_EN);
}
static void mtk_dpi_config_csc_enable(struct mtk_dpi *dpi, bool enable)
{
mtk_dpi_mask(dpi, DPI_CON, enable ? CSC_ENABLE : 0, CSC_ENABLE);
}
static void mtk_dpi_config_swap_input(struct mtk_dpi *dpi, bool enable)
{
mtk_dpi_mask(dpi, DPI_CON, enable ? IN_RB_SWAP : 0, IN_RB_SWAP);
}
static void mtk_dpi_config_2n_h_fre(struct mtk_dpi *dpi)
{
mtk_dpi_mask(dpi, DPI_H_FRE_CON, H_FRE_2N, H_FRE_2N);
}
static void mtk_dpi_config_color_format(struct mtk_dpi *dpi,
enum mtk_dpi_out_color_format format)
{
if ((format == MTK_DPI_COLOR_FORMAT_YCBCR_444) ||
(format == MTK_DPI_COLOR_FORMAT_YCBCR_444_FULL)) {
mtk_dpi_config_yuv422_enable(dpi, false);
mtk_dpi_config_csc_enable(dpi, true);
mtk_dpi_config_swap_input(dpi, false);
mtk_dpi_config_channel_swap(dpi, MTK_DPI_OUT_CHANNEL_SWAP_BGR);
} else if ((format == MTK_DPI_COLOR_FORMAT_YCBCR_422) ||
(format == MTK_DPI_COLOR_FORMAT_YCBCR_422_FULL)) {
mtk_dpi_config_yuv422_enable(dpi, true);
mtk_dpi_config_csc_enable(dpi, true);
mtk_dpi_config_swap_input(dpi, true);
mtk_dpi_config_channel_swap(dpi, MTK_DPI_OUT_CHANNEL_SWAP_RGB);
} else {
mtk_dpi_config_yuv422_enable(dpi, false);
mtk_dpi_config_csc_enable(dpi, false);
mtk_dpi_config_swap_input(dpi, false);
mtk_dpi_config_channel_swap(dpi, MTK_DPI_OUT_CHANNEL_SWAP_RGB);
}
}
static void mtk_dpi_power_off(struct mtk_dpi *dpi, enum mtk_dpi_power_ctl pctl)
{
dpi->power_ctl &= ~pctl;
if ((dpi->power_ctl & DPI_POWER_START) ||
(dpi->power_ctl & DPI_POWER_ENABLE))
return;
if (!dpi->power_sta)
return;
mtk_dpi_disable(dpi);
clk_disable_unprepare(dpi->pixel_clk);
clk_disable_unprepare(dpi->engine_clk);
dpi->power_sta = false;
}
static int mtk_dpi_power_on(struct mtk_dpi *dpi, enum mtk_dpi_power_ctl pctl)
{
int ret;
dpi->power_ctl |= pctl;
if (!(dpi->power_ctl & DPI_POWER_START) &&
!(dpi->power_ctl & DPI_POWER_ENABLE))
return 0;
if (dpi->power_sta)
return 0;
ret = clk_prepare_enable(dpi->engine_clk);
if (ret) {
dev_err(dpi->dev, "Failed to enable engine clock: %d\n", ret);
goto err_eng;
}
ret = clk_prepare_enable(dpi->pixel_clk);
if (ret) {
dev_err(dpi->dev, "Failed to enable pixel clock: %d\n", ret);
goto err_pixel;
}
mtk_dpi_enable(dpi);
dpi->power_sta = true;
return 0;
err_pixel:
clk_disable_unprepare(dpi->engine_clk);
err_eng:
dpi->power_ctl &= ~pctl;
return ret;
}
static int mtk_dpi_set_display_mode(struct mtk_dpi *dpi,
struct drm_display_mode *mode)
{
struct mtk_dpi_yc_limit limit;
struct mtk_dpi_polarities dpi_pol;
struct mtk_dpi_sync_param hsync;
struct mtk_dpi_sync_param vsync_lodd = { 0 };
struct mtk_dpi_sync_param vsync_leven = { 0 };
struct mtk_dpi_sync_param vsync_rodd = { 0 };
struct mtk_dpi_sync_param vsync_reven = { 0 };
unsigned long pix_rate;
unsigned long pll_rate;
unsigned int factor;
pix_rate = 1000UL * mode->clock;
if (mode->clock <= 74000)
factor = 8 * 3;
else
factor = 4 * 3;
pll_rate = pix_rate * factor;
dev_dbg(dpi->dev, "Want PLL %lu Hz, pixel clock %lu Hz\n",
pll_rate, pix_rate);
clk_set_rate(dpi->tvd_clk, pll_rate);
pll_rate = clk_get_rate(dpi->tvd_clk);
pix_rate = pll_rate / factor;
clk_set_rate(dpi->pixel_clk, pix_rate);
pix_rate = clk_get_rate(dpi->pixel_clk);
dev_dbg(dpi->dev, "Got PLL %lu Hz, pixel clock %lu Hz\n",
pll_rate, pix_rate);
limit.c_bottom = 0x0010;
limit.c_top = 0x0FE0;
limit.y_bottom = 0x0010;
limit.y_top = 0x0FE0;
dpi_pol.ck_pol = MTK_DPI_POLARITY_FALLING;
dpi_pol.de_pol = MTK_DPI_POLARITY_RISING;
dpi_pol.hsync_pol = mode->flags & DRM_MODE_FLAG_PHSYNC ?
MTK_DPI_POLARITY_FALLING : MTK_DPI_POLARITY_RISING;
dpi_pol.vsync_pol = mode->flags & DRM_MODE_FLAG_PVSYNC ?
MTK_DPI_POLARITY_FALLING : MTK_DPI_POLARITY_RISING;
hsync.sync_width = mode->hsync_end - mode->hsync_start;
hsync.back_porch = mode->htotal - mode->hsync_end;
hsync.front_porch = mode->hsync_start - mode->hdisplay;
hsync.shift_half_line = false;
vsync_lodd.sync_width = mode->vsync_end - mode->vsync_start;
vsync_lodd.back_porch = mode->vtotal - mode->vsync_end;
vsync_lodd.front_porch = mode->vsync_start - mode->vdisplay;
vsync_lodd.shift_half_line = false;
if (mode->flags & DRM_MODE_FLAG_INTERLACE &&
mode->flags & DRM_MODE_FLAG_3D_MASK) {
vsync_leven = vsync_lodd;
vsync_rodd = vsync_lodd;
vsync_reven = vsync_lodd;
vsync_leven.shift_half_line = true;
vsync_reven.shift_half_line = true;
} else if (mode->flags & DRM_MODE_FLAG_INTERLACE &&
!(mode->flags & DRM_MODE_FLAG_3D_MASK)) {
vsync_leven = vsync_lodd;
vsync_leven.shift_half_line = true;
} else if (!(mode->flags & DRM_MODE_FLAG_INTERLACE) &&
mode->flags & DRM_MODE_FLAG_3D_MASK) {
vsync_rodd = vsync_lodd;
}
mtk_dpi_sw_reset(dpi, true);
mtk_dpi_config_pol(dpi, &dpi_pol);
mtk_dpi_config_hsync(dpi, &hsync);
mtk_dpi_config_vsync_lodd(dpi, &vsync_lodd);
mtk_dpi_config_vsync_rodd(dpi, &vsync_rodd);
mtk_dpi_config_vsync_leven(dpi, &vsync_leven);
mtk_dpi_config_vsync_reven(dpi, &vsync_reven);
mtk_dpi_config_3d(dpi, !!(mode->flags & DRM_MODE_FLAG_3D_MASK));
mtk_dpi_config_interface(dpi, !!(mode->flags &
DRM_MODE_FLAG_INTERLACE));
if (mode->flags & DRM_MODE_FLAG_INTERLACE)
mtk_dpi_config_fb_size(dpi, mode->hdisplay, mode->vdisplay / 2);
else
mtk_dpi_config_fb_size(dpi, mode->hdisplay, mode->vdisplay);
mtk_dpi_config_channel_limit(dpi, &limit);
mtk_dpi_config_bit_num(dpi, dpi->bit_num);
mtk_dpi_config_channel_swap(dpi, dpi->channel_swap);
mtk_dpi_config_yc_map(dpi, dpi->yc_map);
mtk_dpi_config_color_format(dpi, dpi->color_format);
mtk_dpi_config_2n_h_fre(dpi);
mtk_dpi_sw_reset(dpi, false);
return 0;
}
static void mtk_dpi_encoder_destroy(struct drm_encoder *encoder)
{
drm_encoder_cleanup(encoder);
}
static const struct drm_encoder_funcs mtk_dpi_encoder_funcs = {
.destroy = mtk_dpi_encoder_destroy,
};
static bool mtk_dpi_encoder_mode_fixup(struct drm_encoder *encoder,
const struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
return true;
}
static void mtk_dpi_encoder_mode_set(struct drm_encoder *encoder,
struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
struct mtk_dpi *dpi = mtk_dpi_from_encoder(encoder);
drm_mode_copy(&dpi->mode, adjusted_mode);
}
static void mtk_dpi_encoder_disable(struct drm_encoder *encoder)
{
struct mtk_dpi *dpi = mtk_dpi_from_encoder(encoder);
mtk_dpi_power_off(dpi, DPI_POWER_ENABLE);
}
static void mtk_dpi_encoder_enable(struct drm_encoder *encoder)
{
struct mtk_dpi *dpi = mtk_dpi_from_encoder(encoder);
mtk_dpi_power_on(dpi, DPI_POWER_ENABLE);
mtk_dpi_set_display_mode(dpi, &dpi->mode);
}
static int mtk_dpi_atomic_check(struct drm_encoder *encoder,
struct drm_crtc_state *crtc_state,
struct drm_connector_state *conn_state)
{
return 0;
}
static const struct drm_encoder_helper_funcs mtk_dpi_encoder_helper_funcs = {
.mode_fixup = mtk_dpi_encoder_mode_fixup,
.mode_set = mtk_dpi_encoder_mode_set,
.disable = mtk_dpi_encoder_disable,
.enable = mtk_dpi_encoder_enable,
.atomic_check = mtk_dpi_atomic_check,
};
static void mtk_dpi_start(struct mtk_ddp_comp *comp)
{
struct mtk_dpi *dpi = container_of(comp, struct mtk_dpi, ddp_comp);
mtk_dpi_power_on(dpi, DPI_POWER_START);
}
static void mtk_dpi_stop(struct mtk_ddp_comp *comp)
{
struct mtk_dpi *dpi = container_of(comp, struct mtk_dpi, ddp_comp);
mtk_dpi_power_off(dpi, DPI_POWER_START);
}
static const struct mtk_ddp_comp_funcs mtk_dpi_funcs = {
.start = mtk_dpi_start,
.stop = mtk_dpi_stop,
};
static int mtk_dpi_bind(struct device *dev, struct device *master, void *data)
{
struct mtk_dpi *dpi = dev_get_drvdata(dev);
struct drm_device *drm_dev = data;
int ret;
ret = mtk_ddp_comp_register(drm_dev, &dpi->ddp_comp);
if (ret < 0) {
dev_err(dev, "Failed to register component %s: %d\n",
dev->of_node->full_name, ret);
return ret;
}
ret = drm_encoder_init(drm_dev, &dpi->encoder, &mtk_dpi_encoder_funcs,
DRM_MODE_ENCODER_TMDS, NULL);
if (ret) {
dev_err(dev, "Failed to initialize decoder: %d\n", ret);
goto err_unregister;
}
drm_encoder_helper_add(&dpi->encoder, &mtk_dpi_encoder_helper_funcs);
/* Currently DPI0 is fixed to be driven by OVL1 */
dpi->encoder.possible_crtcs = BIT(1);
dpi->encoder.bridge->encoder = &dpi->encoder;
ret = drm_bridge_attach(dpi->encoder.dev, dpi->encoder.bridge);
if (ret) {
dev_err(dev, "Failed to attach bridge: %d\n", ret);
goto err_cleanup;
}
dpi->bit_num = MTK_DPI_OUT_BIT_NUM_8BITS;
dpi->channel_swap = MTK_DPI_OUT_CHANNEL_SWAP_RGB;
dpi->yc_map = MTK_DPI_OUT_YC_MAP_RGB;
dpi->color_format = MTK_DPI_COLOR_FORMAT_RGB;
return 0;
err_cleanup:
drm_encoder_cleanup(&dpi->encoder);
err_unregister:
mtk_ddp_comp_unregister(drm_dev, &dpi->ddp_comp);
return ret;
}
static void mtk_dpi_unbind(struct device *dev, struct device *master,
void *data)
{
struct mtk_dpi *dpi = dev_get_drvdata(dev);
struct drm_device *drm_dev = data;
drm_encoder_cleanup(&dpi->encoder);
mtk_ddp_comp_unregister(drm_dev, &dpi->ddp_comp);
}
static const struct component_ops mtk_dpi_component_ops = {
.bind = mtk_dpi_bind,
.unbind = mtk_dpi_unbind,
};
static int mtk_dpi_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct mtk_dpi *dpi;
struct resource *mem;
struct device_node *ep, *bridge_node = NULL;
int comp_id;
int ret;
dpi = devm_kzalloc(dev, sizeof(*dpi), GFP_KERNEL);
if (!dpi)
return -ENOMEM;
dpi->dev = dev;
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
dpi->regs = devm_ioremap_resource(dev, mem);
if (IS_ERR(dpi->regs)) {
ret = PTR_ERR(dpi->regs);
dev_err(dev, "Failed to ioremap mem resource: %d\n", ret);
return ret;
}
dpi->engine_clk = devm_clk_get(dev, "engine");
if (IS_ERR(dpi->engine_clk)) {
ret = PTR_ERR(dpi->engine_clk);
dev_err(dev, "Failed to get engine clock: %d\n", ret);
return ret;
}
dpi->pixel_clk = devm_clk_get(dev, "pixel");
if (IS_ERR(dpi->pixel_clk)) {
ret = PTR_ERR(dpi->pixel_clk);
dev_err(dev, "Failed to get pixel clock: %d\n", ret);
return ret;
}
dpi->tvd_clk = devm_clk_get(dev, "pll");
if (IS_ERR(dpi->tvd_clk)) {
ret = PTR_ERR(dpi->tvd_clk);
dev_err(dev, "Failed to get tvdpll clock: %d\n", ret);
return ret;
}
dpi->irq = platform_get_irq(pdev, 0);
if (dpi->irq <= 0) {
dev_err(dev, "Failed to get irq: %d\n", dpi->irq);
return -EINVAL;
}
ep = of_graph_get_next_endpoint(dev->of_node, NULL);
if (ep) {
bridge_node = of_graph_get_remote_port_parent(ep);
of_node_put(ep);
}
if (!bridge_node) {
dev_err(dev, "Failed to find bridge node\n");
return -ENODEV;
}
dev_info(dev, "Found bridge node: %s\n", bridge_node->full_name);
dpi->encoder.bridge = of_drm_find_bridge(bridge_node);
of_node_put(bridge_node);
if (!dpi->encoder.bridge)
return -EPROBE_DEFER;
comp_id = mtk_ddp_comp_get_id(dev->of_node, MTK_DPI);
if (comp_id < 0) {
dev_err(dev, "Failed to identify by alias: %d\n", comp_id);
return comp_id;
}
ret = mtk_ddp_comp_init(dev, dev->of_node, &dpi->ddp_comp, comp_id,
&mtk_dpi_funcs);
if (ret) {
dev_err(dev, "Failed to initialize component: %d\n", ret);
return ret;
}
platform_set_drvdata(pdev, dpi);
ret = component_add(dev, &mtk_dpi_component_ops);
if (ret) {
dev_err(dev, "Failed to add component: %d\n", ret);
return ret;
}
return 0;
}
static int mtk_dpi_remove(struct platform_device *pdev)
{
component_del(&pdev->dev, &mtk_dpi_component_ops);
return 0;
}
static const struct of_device_id mtk_dpi_of_ids[] = {
{ .compatible = "mediatek,mt8173-dpi", },
{}
};
struct platform_driver mtk_dpi_driver = {
.probe = mtk_dpi_probe,
.remove = mtk_dpi_remove,
.driver = {
.name = "mediatek-dpi",
.of_match_table = mtk_dpi_of_ids,
},
};
Reference in New Issue View Git Blame Copy Permalink