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Created October 14, 2019 11:13
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tianma_499_720p_video_v2
// SPDX-License-Identifier: GPL-2.0-only
// Copyright (c) 2013, The Linux Foundation. All rights reserved.
static const struct drm_display_mode tianma_499_v2_mode = {
.clock = (720 + 52 + 20 + 84) * (1280 + 20 + 8 + 20) * 60 / 1000,
.hdisplay = 720,
.hsync_start = 720 + 52,
.hsync_end = 720 + 52 + 20,
.htotal = 720 + 52 + 20 + 84,
.vdisplay = 1280,
.vsync_start = 1280 + 20,
.vsync_end = 1280 + 20 + 8,
.vtotal = 1280 + 20 + 8 + 20,
.vrefresh = 60,
.width_mm = 62,
.height_mm = 110,
};
static const struct panel_desc_dsi tianma_499_v2 = {
.desc = {
.modes = &tianma_499_v2_mode,
.num_modes = 1,
.bpc = 8,
.size = {
.width = 62,
.height = 110,
},
},
.flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
MIPI_DSI_MODE_VIDEO_HSE | MIPI_DSI_CLOCK_NON_CONTINUOUS |
MIPI_DSI_MODE_LPM,
.format = MIPI_DSI_FMT_RGB888,
.lanes = 4,
};
// SPDX-License-Identifier: GPL-2.0-only
// Copyright (c) 2013, The Linux Foundation. All rights reserved.
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_modes.h>
#include <drm/drm_panel.h>
#include <linux/backlight.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/of.h>
#include <video/mipi_display.h>
struct tianma_499_v2 {
struct drm_panel panel;
struct mipi_dsi_device *dsi;
struct backlight_device *backlight;
struct gpio_desc *reset_gpio;
bool prepared;
bool enabled;
};
static inline struct tianma_499_v2 *to_tianma_499_v2(struct drm_panel *panel)
{
return container_of(panel, struct tianma_499_v2, panel);
}
#define dsi_dcs_write_seq(dsi, seq...) do { \
static const u8 d[] = { seq }; \
int ret; \
ret = mipi_dsi_dcs_write_buffer(dsi, d, ARRAY_SIZE(d)); \
if (ret < 0) \
return ret; \
} while (0)
static void tianma_499_v2_reset(struct tianma_499_v2 *ctx)
{
gpiod_set_value_cansleep(ctx->reset_gpio, 1);
usleep_range(1000, 2000);
gpiod_set_value_cansleep(ctx->reset_gpio, 0);
usleep_range(10000, 11000);
gpiod_set_value_cansleep(ctx->reset_gpio, 1);
msleep(20);
}
static int tianma_499_v2_on(struct tianma_499_v2 *ctx)
{
struct mipi_dsi_device *dsi = ctx->dsi;
struct device *dev = &dsi->dev;
int ret;
dsi_dcs_write_seq(dsi, 0xff, 0x98, 0x81, 0x00);
ret = mipi_dsi_dcs_set_display_brightness(dsi, 0x0000);
if (ret < 0) {
dev_err(dev, "Failed to set display brightness: %d\n", ret);
return ret;
}
dsi_dcs_write_seq(dsi, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x2c);
dsi_dcs_write_seq(dsi, MIPI_DCS_WRITE_POWER_SAVE, 0x01);
dsi_dcs_write_seq(dsi, 0x68, 0x06);
ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
if (ret < 0) {
dev_err(dev, "Failed to exit sleep mode: %d\n", ret);
return ret;
}
msleep(120);
ret = mipi_dsi_dcs_set_display_on(dsi);
if (ret < 0) {
dev_err(dev, "Failed to set display on: %d\n", ret);
return ret;
}
msleep(20);
return 0;
}
static int tianma_499_v2_off(struct tianma_499_v2 *ctx)
{
struct mipi_dsi_device *dsi = ctx->dsi;
struct device *dev = &dsi->dev;
int ret;
ret = mipi_dsi_dcs_set_display_off(dsi);
if (ret < 0) {
dev_err(dev, "Failed to set display off: %d\n", ret);
return ret;
}
msleep(20);
ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
if (ret < 0) {
dev_err(dev, "Failed to enter sleep mode: %d\n", ret);
return ret;
}
msleep(120);
return 0;
}
static int tianma_499_v2_prepare(struct drm_panel *panel)
{
struct tianma_499_v2 *ctx = to_tianma_499_v2(panel);
struct device *dev = &ctx->dsi->dev;
int ret;
if (ctx->prepared)
return 0;
tianma_499_v2_reset(ctx);
ret = tianma_499_v2_on(ctx);
if (ret < 0) {
dev_err(dev, "Failed to initialize panel: %d\n", ret);
gpiod_set_value_cansleep(ctx->reset_gpio, 0);
return ret;
}
ctx->prepared = true;
return 0;
}
static int tianma_499_v2_unprepare(struct drm_panel *panel)
{
struct tianma_499_v2 *ctx = to_tianma_499_v2(panel);
struct device *dev = &ctx->dsi->dev;
int ret;
if (!ctx->prepared)
return 0;
ret = tianma_499_v2_off(ctx);
if (ret < 0)
dev_err(dev, "Failed to un-initialize panel: %d\n", ret);
gpiod_set_value_cansleep(ctx->reset_gpio, 0);
ctx->prepared = false;
return 0;
}
static int tianma_499_v2_enable(struct drm_panel *panel)
{
struct tianma_499_v2 *ctx = to_tianma_499_v2(panel);
int ret;
if (ctx->enabled)
return 0;
ret = backlight_enable(ctx->backlight);
if (ret < 0) {
dev_err(&ctx->dsi->dev, "Failed to enable backlight: %d\n", ret);
return ret;
}
ctx->enabled = true;
return 0;
}
static int tianma_499_v2_disable(struct drm_panel *panel)
{
struct tianma_499_v2 *ctx = to_tianma_499_v2(panel);
int ret;
if (!ctx->enabled)
return 0;
ret = backlight_disable(ctx->backlight);
if (ret < 0) {
dev_err(&ctx->dsi->dev, "Failed to disable backlight: %d\n", ret);
return ret;
}
ctx->enabled = false;
return 0;
}
static const struct drm_display_mode tianma_499_v2_mode = {
.clock = (720 + 52 + 20 + 84) * (1280 + 20 + 8 + 20) * 60 / 1000,
.hdisplay = 720,
.hsync_start = 720 + 52,
.hsync_end = 720 + 52 + 20,
.htotal = 720 + 52 + 20 + 84,
.vdisplay = 1280,
.vsync_start = 1280 + 20,
.vsync_end = 1280 + 20 + 8,
.vtotal = 1280 + 20 + 8 + 20,
.vrefresh = 60,
.width_mm = 62,
.height_mm = 110,
};
static int tianma_499_v2_get_modes(struct drm_panel *panel)
{
struct drm_display_mode *mode;
mode = drm_mode_duplicate(panel->drm, &tianma_499_v2_mode);
if (!mode)
return -ENOMEM;
drm_mode_set_name(mode);
mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
panel->connector->display_info.width_mm = mode->width_mm;
panel->connector->display_info.height_mm = mode->height_mm;
drm_mode_probed_add(panel->connector, mode);
return 1;
}
static const struct drm_panel_funcs tianma_499_v2_panel_funcs = {
.disable = tianma_499_v2_disable,
.unprepare = tianma_499_v2_unprepare,
.prepare = tianma_499_v2_prepare,
.enable = tianma_499_v2_enable,
.get_modes = tianma_499_v2_get_modes,
};
static int dsi_dcs_bl_get_brightness(struct backlight_device *bl)
{
struct mipi_dsi_device *dsi = bl_get_data(bl);
int ret;
u16 brightness = bl->props.brightness;
dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
ret = mipi_dsi_dcs_get_display_brightness(dsi, &brightness);
if (ret < 0)
return ret;
dsi->mode_flags |= MIPI_DSI_MODE_LPM;
return brightness;
}
static int dsi_dcs_bl_update_status(struct backlight_device *bl)
{
struct mipi_dsi_device *dsi = bl_get_data(bl);
int ret;
dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
ret = mipi_dsi_dcs_set_display_brightness(dsi, bl->props.brightness);
if (ret < 0)
return ret;
dsi->mode_flags |= MIPI_DSI_MODE_LPM;
return 0;
}
static const struct backlight_ops dsi_bl_ops = {
.update_status = dsi_dcs_bl_update_status,
.get_brightness = dsi_dcs_bl_get_brightness,
};
static struct backlight_device *
tianma_499_v2_create_backlight(struct mipi_dsi_device *dsi)
{
struct device *dev = &dsi->dev;
struct backlight_properties props;
memset(&props, 0, sizeof(props));
props.type = BACKLIGHT_RAW;
props.brightness = 4095;
props.max_brightness = 4095;
return devm_backlight_device_register(dev, dev_name(dev), dev, dsi,
&dsi_bl_ops, &props);
}
static int tianma_499_v2_probe(struct mipi_dsi_device *dsi)
{
struct device *dev = &dsi->dev;
struct tianma_499_v2 *ctx;
int ret;
ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
if (IS_ERR(ctx->reset_gpio)) {
ret = PTR_ERR(ctx->reset_gpio);
dev_err(dev, "Failed to get reset-gpios: %d\n", ret);
return ret;
}
ctx->backlight = tianma_499_v2_create_backlight(dsi);
if (IS_ERR(ctx->backlight)) {
ret = PTR_ERR(ctx->backlight);
dev_err(dev, "Failed to create backlight: %d\n", ret);
return ret;
}
ctx->dsi = dsi;
mipi_dsi_set_drvdata(dsi, ctx);
dsi->lanes = 4;
dsi->format = MIPI_DSI_FMT_RGB888;
dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
MIPI_DSI_MODE_VIDEO_HSE |
MIPI_DSI_CLOCK_NON_CONTINUOUS | MIPI_DSI_MODE_LPM;
drm_panel_init(&ctx->panel);
ctx->panel.dev = dev;
ctx->panel.funcs = &tianma_499_v2_panel_funcs;
ret = drm_panel_add(&ctx->panel);
if (ret < 0) {
dev_err(dev, "Failed to add panel: %d\n", ret);
return ret;
}
ret = mipi_dsi_attach(dsi);
if (ret < 0) {
dev_err(dev, "Failed to attach to DSI host: %d\n", ret);
return ret;
}
return 0;
}
static int tianma_499_v2_remove(struct mipi_dsi_device *dsi)
{
struct tianma_499_v2 *ctx = mipi_dsi_get_drvdata(dsi);
int ret;
ret = mipi_dsi_detach(dsi);
if (ret < 0)
dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret);
drm_panel_remove(&ctx->panel);
return 0;
}
static const struct of_device_id tianma_499_v2_of_match[] = {
{ .compatible = "mdss,tianma_499_v2" }, // FIXME
{ }
};
MODULE_DEVICE_TABLE(of, tianma_499_v2_of_match);
static struct mipi_dsi_driver tianma_499_v2_driver = {
.probe = tianma_499_v2_probe,
.remove = tianma_499_v2_remove,
.driver = {
.name = "panel-tianma-499-v2",
.of_match_table = tianma_499_v2_of_match,
},
};
module_mipi_dsi_driver(tianma_499_v2_driver);
MODULE_AUTHOR("linux-mdss-dsi-panel-driver-generator <fix@me>");
MODULE_DESCRIPTION("DRM driver for mipi_mot_video_tianma_720p_499");
MODULE_LICENSE("GPL v2");
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