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alistair23-linux/drivers/gpu/drm/mediatek/mtk_dpi.c
Thomas Gleixner 1802d0beec treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 
Based on 1 normalized pattern(s):

  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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 655 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070034.575739538@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:41 -07:00

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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2014 MediaTek Inc.
* Author: Jie Qiu <jie.qiu@mediatek.com>
*/
#include <drm/drmP.h>
#include <drm/drm_crtc.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_of.h>
#include <linux/kernel.h>
#include <linux/component.h>
#include <linux/platform_device.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_graph.h>
#include <linux/interrupt.h>
#include <linux/types.h>
#include <linux/clk.h>
#include <video/videomode.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;
struct drm_bridge *bridge;
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;
const struct mtk_dpi_conf *conf;
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;
int refcount;
};
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,
};
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;
};
struct mtk_dpi_conf {
unsigned int (*cal_factor)(int clock);
u32 reg_h_fre_con;
bool edge_sel_en;
};
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->conf->reg_h_fre_con, H_FRE_2N, H_FRE_2N);
}
static void mtk_dpi_config_disable_edge(struct mtk_dpi *dpi)
{
if (dpi->conf->edge_sel_en)
mtk_dpi_mask(dpi, dpi->conf->reg_h_fre_con, 0, EDGE_SEL_EN);
}
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)
{
if (WARN_ON(dpi->refcount == 0))
return;
if (--dpi->refcount != 0)
return;
mtk_dpi_disable(dpi);
clk_disable_unprepare(dpi->pixel_clk);
clk_disable_unprepare(dpi->engine_clk);
}
static int mtk_dpi_power_on(struct mtk_dpi *dpi)
{
int ret;
if (++dpi->refcount != 1)
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_refcount;
}
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);
return 0;
err_pixel:
clk_disable_unprepare(dpi->engine_clk);
err_refcount:
dpi->refcount--;
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 };
struct videomode vm = { 0 };
unsigned long pll_rate;
unsigned int factor;
/* let pll_rate can fix the valid range of tvdpll (1G~2GHz) */
factor = dpi->conf->cal_factor(mode->clock);
drm_display_mode_to_videomode(mode, &vm);
pll_rate = vm.pixelclock * factor;
dev_dbg(dpi->dev, "Want PLL %lu Hz, pixel clock %lu Hz\n",
pll_rate, vm.pixelclock);
clk_set_rate(dpi->tvd_clk, pll_rate);
pll_rate = clk_get_rate(dpi->tvd_clk);
vm.pixelclock = pll_rate / factor;
clk_set_rate(dpi->pixel_clk, vm.pixelclock);
vm.pixelclock = clk_get_rate(dpi->pixel_clk);
dev_dbg(dpi->dev, "Got PLL %lu Hz, pixel clock %lu Hz\n",
pll_rate, vm.pixelclock);
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 = vm.flags & DISPLAY_FLAGS_HSYNC_HIGH ?
MTK_DPI_POLARITY_FALLING : MTK_DPI_POLARITY_RISING;
dpi_pol.vsync_pol = vm.flags & DISPLAY_FLAGS_VSYNC_HIGH ?
MTK_DPI_POLARITY_FALLING : MTK_DPI_POLARITY_RISING;
hsync.sync_width = vm.hsync_len;
hsync.back_porch = vm.hback_porch;
hsync.front_porch = vm.hfront_porch;
hsync.shift_half_line = false;
vsync_lodd.sync_width = vm.vsync_len;
vsync_lodd.back_porch = vm.vback_porch;
vsync_lodd.front_porch = vm.vfront_porch;
vsync_lodd.shift_half_line = false;
if (vm.flags & DISPLAY_FLAGS_INTERLACED &&
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 (vm.flags & DISPLAY_FLAGS_INTERLACED &&
!(mode->flags & DRM_MODE_FLAG_3D_MASK)) {
vsync_leven = vsync_lodd;
vsync_leven.shift_half_line = true;
} else if (!(vm.flags & DISPLAY_FLAGS_INTERLACED) &&
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, !!(vm.flags &
DISPLAY_FLAGS_INTERLACED));
if (vm.flags & DISPLAY_FLAGS_INTERLACED)
mtk_dpi_config_fb_size(dpi, vm.hactive, vm.vactive >> 1);
else
mtk_dpi_config_fb_size(dpi, vm.hactive, vm.vactive);
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_config_disable_edge(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);
}
static void mtk_dpi_encoder_enable(struct drm_encoder *encoder)
{
struct mtk_dpi *dpi = mtk_dpi_from_encoder(encoder);
mtk_dpi_power_on(dpi);
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);
}
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);
}
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 %pOF: %d\n",
dev->of_node, 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);
ret = drm_bridge_attach(&dpi->encoder, dpi->bridge, NULL);
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 unsigned int mt8173_calculate_factor(int clock)
{
if (clock <= 27000)
return 3 << 4;
else if (clock <= 84000)
return 3 << 3;
else if (clock <= 167000)
return 3 << 2;
else
return 3 << 1;
}
static unsigned int mt2701_calculate_factor(int clock)
{
if (clock <= 64000)
return 4;
else if (clock <= 128000)
return 2;
else
return 1;
}
static const struct mtk_dpi_conf mt8173_conf = {
.cal_factor = mt8173_calculate_factor,
.reg_h_fre_con = 0xe0,
};
static const struct mtk_dpi_conf mt2701_conf = {
.cal_factor = mt2701_calculate_factor,
.reg_h_fre_con = 0xb0,
.edge_sel_en = true,
};
static int mtk_dpi_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct mtk_dpi *dpi;
struct resource *mem;
int comp_id;
int ret;
dpi = devm_kzalloc(dev, sizeof(*dpi), GFP_KERNEL);
if (!dpi)
return -ENOMEM;
dpi->dev = dev;
dpi->conf = (struct mtk_dpi_conf *)of_device_get_match_data(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;
}
ret = drm_of_find_panel_or_bridge(dev->of_node, 0, 0,
NULL, &dpi->bridge);
if (ret)
return ret;
dev_info(dev, "Found bridge node: %pOF\n", dpi->bridge->of_node);
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,mt2701-dpi",
.data = &mt2701_conf,
},
{ .compatible = "mediatek,mt8173-dpi",
.data = &mt8173_conf,
},
{ },
};
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,
},
};
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