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mirror_ubuntu-kernels/drivers/gpu/drm/panel/panel-asus-z00t-tm5p5-n35596.c
Douglas Anderson f8c37b8809 drm/panel: Don't store+check prepared/enabled for simple cases 
As talked about in commit d2aacaf073 ("drm/panel: Check for already
prepared/enabled in drm_panel"), we want to remove needless code from
panel drivers that was storing and double-checking the
prepared/enabled state. Even if someone was relying on the
double-check before, that double-check is now in the core and not
needed in individual drivers.

This pile of panel drivers appears to be simple to handle. Based on
code inspection they seemed to be using the prepared/enabled state
simply for double-checking that nothing else in the kernel called them
inconsistently. Now that the core drm_panel is doing the double
checking (and warning) it should be very clear that these devices
don't need their own double-check.

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230804140605.RFC.1.Ia54954fd2f7645c1b86597494902973f57feeb71@changeid
2023-09-13 08:36:18 -07:00

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// SPDX-License-Identifier: GPL-2.0-only
#include <linux/backlight.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/regulator/consumer.h>
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_modes.h>
#include <drm/drm_panel.h>
struct tm5p5_nt35596 {
struct drm_panel panel;
struct mipi_dsi_device *dsi;
struct regulator_bulk_data supplies[2];
struct gpio_desc *reset_gpio;
};
static inline struct tm5p5_nt35596 *to_tm5p5_nt35596(struct drm_panel *panel)
{
return container_of(panel, struct tm5p5_nt35596, panel);
}
static void tm5p5_nt35596_reset(struct tm5p5_nt35596 *ctx)
{
gpiod_set_value_cansleep(ctx->reset_gpio, 1);
usleep_range(1000, 2000);
gpiod_set_value_cansleep(ctx->reset_gpio, 0);
usleep_range(1000, 2000);
gpiod_set_value_cansleep(ctx->reset_gpio, 1);
usleep_range(15000, 16000);
}
static int tm5p5_nt35596_on(struct tm5p5_nt35596 *ctx)
{
struct mipi_dsi_device *dsi = ctx->dsi;
mipi_dsi_generic_write_seq(dsi, 0xff, 0x05);
mipi_dsi_generic_write_seq(dsi, 0xfb, 0x01);
mipi_dsi_generic_write_seq(dsi, 0xc5, 0x31);
mipi_dsi_generic_write_seq(dsi, 0xff, 0x04);
mipi_dsi_generic_write_seq(dsi, 0x01, 0x84);
mipi_dsi_generic_write_seq(dsi, 0x05, 0x25);
mipi_dsi_generic_write_seq(dsi, 0x06, 0x01);
mipi_dsi_generic_write_seq(dsi, 0x07, 0x20);
mipi_dsi_generic_write_seq(dsi, 0x08, 0x06);
mipi_dsi_generic_write_seq(dsi, 0x09, 0x08);
mipi_dsi_generic_write_seq(dsi, 0x0a, 0x10);
mipi_dsi_generic_write_seq(dsi, 0x0b, 0x10);
mipi_dsi_generic_write_seq(dsi, 0x0c, 0x10);
mipi_dsi_generic_write_seq(dsi, 0x0d, 0x14);
mipi_dsi_generic_write_seq(dsi, 0x0e, 0x14);
mipi_dsi_generic_write_seq(dsi, 0x0f, 0x14);
mipi_dsi_generic_write_seq(dsi, 0x10, 0x14);
mipi_dsi_generic_write_seq(dsi, 0x11, 0x14);
mipi_dsi_generic_write_seq(dsi, 0x12, 0x14);
mipi_dsi_generic_write_seq(dsi, 0x17, 0xf3);
mipi_dsi_generic_write_seq(dsi, 0x18, 0xc0);
mipi_dsi_generic_write_seq(dsi, 0x19, 0xc0);
mipi_dsi_generic_write_seq(dsi, 0x1a, 0xc0);
mipi_dsi_generic_write_seq(dsi, 0x1b, 0xb3);
mipi_dsi_generic_write_seq(dsi, 0x1c, 0xb3);
mipi_dsi_generic_write_seq(dsi, 0x1d, 0xb3);
mipi_dsi_generic_write_seq(dsi, 0x1e, 0xb3);
mipi_dsi_generic_write_seq(dsi, 0x1f, 0xb3);
mipi_dsi_generic_write_seq(dsi, 0x20, 0xb3);
mipi_dsi_generic_write_seq(dsi, 0xfb, 0x01);
mipi_dsi_generic_write_seq(dsi, 0xff, 0x00);
mipi_dsi_generic_write_seq(dsi, 0xfb, 0x01);
mipi_dsi_generic_write_seq(dsi, 0x35, 0x01);
mipi_dsi_generic_write_seq(dsi, 0xd3, 0x06);
mipi_dsi_generic_write_seq(dsi, 0xd4, 0x04);
mipi_dsi_generic_write_seq(dsi, 0x5e, 0x0d);
mipi_dsi_generic_write_seq(dsi, 0x11, 0x00);
msleep(100);
mipi_dsi_generic_write_seq(dsi, 0x29, 0x00);
mipi_dsi_generic_write_seq(dsi, 0x53, 0x24);
return 0;
}
static int tm5p5_nt35596_off(struct tm5p5_nt35596 *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(60);
ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
if (ret < 0) {
dev_err(dev, "Failed to enter sleep mode: %d\n", ret);
return ret;
}
mipi_dsi_dcs_write_seq(dsi, 0x4f, 0x01);
return 0;
}
static int tm5p5_nt35596_prepare(struct drm_panel *panel)
{
struct tm5p5_nt35596 *ctx = to_tm5p5_nt35596(panel);
struct device *dev = &ctx->dsi->dev;
int ret;
ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
if (ret < 0) {
dev_err(dev, "Failed to enable regulators: %d\n", ret);
return ret;
}
tm5p5_nt35596_reset(ctx);
ret = tm5p5_nt35596_on(ctx);
if (ret < 0) {
dev_err(dev, "Failed to initialize panel: %d\n", ret);
gpiod_set_value_cansleep(ctx->reset_gpio, 0);
regulator_bulk_disable(ARRAY_SIZE(ctx->supplies),
ctx->supplies);
return ret;
}
return 0;
}
static int tm5p5_nt35596_unprepare(struct drm_panel *panel)
{
struct tm5p5_nt35596 *ctx = to_tm5p5_nt35596(panel);
struct device *dev = &ctx->dsi->dev;
int ret;
ret = tm5p5_nt35596_off(ctx);
if (ret < 0)
dev_err(dev, "Failed to un-initialize panel: %d\n", ret);
gpiod_set_value_cansleep(ctx->reset_gpio, 0);
regulator_bulk_disable(ARRAY_SIZE(ctx->supplies),
ctx->supplies);
return 0;
}
static const struct drm_display_mode tm5p5_nt35596_mode = {
.clock = (1080 + 100 + 8 + 16) * (1920 + 4 + 2 + 4) * 60 / 1000,
.hdisplay = 1080,
.hsync_start = 1080 + 100,
.hsync_end = 1080 + 100 + 8,
.htotal = 1080 + 100 + 8 + 16,
.vdisplay = 1920,
.vsync_start = 1920 + 4,
.vsync_end = 1920 + 4 + 2,
.vtotal = 1920 + 4 + 2 + 4,
.width_mm = 68,
.height_mm = 121,
};
static int tm5p5_nt35596_get_modes(struct drm_panel *panel,
struct drm_connector *connector)
{
struct drm_display_mode *mode;
mode = drm_mode_duplicate(connector->dev, &tm5p5_nt35596_mode);
if (!mode)
return -ENOMEM;
drm_mode_set_name(mode);
mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
connector->display_info.width_mm = mode->width_mm;
connector->display_info.height_mm = mode->height_mm;
drm_mode_probed_add(connector, mode);
return 1;
}
static const struct drm_panel_funcs tm5p5_nt35596_panel_funcs = {
.prepare = tm5p5_nt35596_prepare,
.unprepare = tm5p5_nt35596_unprepare,
.get_modes = tm5p5_nt35596_get_modes,
};
static int tm5p5_nt35596_bl_update_status(struct backlight_device *bl)
{
struct mipi_dsi_device *dsi = bl_get_data(bl);
u16 brightness = backlight_get_brightness(bl);
int ret;
dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
ret = mipi_dsi_dcs_set_display_brightness(dsi, brightness);
if (ret < 0)
return ret;
dsi->mode_flags |= MIPI_DSI_MODE_LPM;
return 0;
}
static int tm5p5_nt35596_bl_get_brightness(struct backlight_device *bl)
{
struct mipi_dsi_device *dsi = bl_get_data(bl);
u16 brightness = bl->props.brightness;
int ret;
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 & 0xff;
}
static const struct backlight_ops tm5p5_nt35596_bl_ops = {
.update_status = tm5p5_nt35596_bl_update_status,
.get_brightness = tm5p5_nt35596_bl_get_brightness,
};
static struct backlight_device *
tm5p5_nt35596_create_backlight(struct mipi_dsi_device *dsi)
{
struct device *dev = &dsi->dev;
const struct backlight_properties props = {
.type = BACKLIGHT_RAW,
.brightness = 255,
.max_brightness = 255,
};
return devm_backlight_device_register(dev, dev_name(dev), dev, dsi,
&tm5p5_nt35596_bl_ops, &props);
}
static int tm5p5_nt35596_probe(struct mipi_dsi_device *dsi)
{
struct device *dev = &dsi->dev;
struct tm5p5_nt35596 *ctx;
int ret;
ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
ctx->supplies[0].supply = "vdd";
ctx->supplies[1].supply = "vddio";
ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies),
ctx->supplies);
if (ret < 0) {
dev_err(dev, "Failed to get regulators: %d\n", ret);
return ret;
}
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->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_MODE_NO_EOT_PACKET |
MIPI_DSI_CLOCK_NON_CONTINUOUS | MIPI_DSI_MODE_LPM;
drm_panel_init(&ctx->panel, dev, &tm5p5_nt35596_panel_funcs,
DRM_MODE_CONNECTOR_DSI);
ctx->panel.backlight = tm5p5_nt35596_create_backlight(dsi);
if (IS_ERR(ctx->panel.backlight)) {
ret = PTR_ERR(ctx->panel.backlight);
dev_err(dev, "Failed to create backlight: %d\n", ret);
return ret;
}
drm_panel_add(&ctx->panel);
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 void tm5p5_nt35596_remove(struct mipi_dsi_device *dsi)
{
struct tm5p5_nt35596 *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);
}
static const struct of_device_id tm5p5_nt35596_of_match[] = {
{ .compatible = "asus,z00t-tm5p5-n35596" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, tm5p5_nt35596_of_match);
static struct mipi_dsi_driver tm5p5_nt35596_driver = {
.probe = tm5p5_nt35596_probe,
.remove = tm5p5_nt35596_remove,
.driver = {
.name = "panel-tm5p5-nt35596",
.of_match_table = tm5p5_nt35596_of_match,
},
};
module_mipi_dsi_driver(tm5p5_nt35596_driver);
MODULE_AUTHOR("Konrad Dybcio <konradybcio@gmail.com>");
MODULE_DESCRIPTION("DRM driver for tm5p5 nt35596 1080p video mode dsi panel");
MODULE_LICENSE("GPL v2");
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