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drm/panel: sitronix-st7789v: use drm_panel backlight support 

Use the backlight support in drm_panel to simplify the driver

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20191207140353.23967-24-sam@ravnborg.org
This commit is contained in:
Sam Ravnborg 2019-12-07 15:03:51 +01:00
parent e46eb37a2d
commit 31a59a9c04
1 changed files with 4 additions and 33 deletions
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37
drivers/gpu/drm/panel/panel-sitronix-st7789v.c
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@ -3,7 +3,6 @@
* Copyright (C) 2017 Free Electrons
*/
#include <linux/backlight.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/module.h>
@ -116,7 +115,6 @@ struct st7789v {
struct drm_panel panel;
struct spi_device *spi;
struct gpio_desc *reset;
struct backlight_device *backlight;
struct regulator *power;
};
@ -323,12 +321,6 @@ static int st7789v_enable(struct drm_panel *panel)
{
struct st7789v *ctx = panel_to_st7789v(panel);
if (ctx->backlight) {
ctx->backlight->props.state &= ~BL_CORE_FBBLANK;
ctx->backlight->props.power = FB_BLANK_UNBLANK;
backlight_update_status(ctx->backlight);
}
return st7789v_write_command(ctx, MIPI_DCS_SET_DISPLAY_ON);
}
@ -339,12 +331,6 @@ static int st7789v_disable(struct drm_panel *panel)
ST7789V_TEST(ret, st7789v_write_command(ctx, MIPI_DCS_SET_DISPLAY_OFF));
if (ctx->backlight) {
ctx->backlight->props.power = FB_BLANK_POWERDOWN;
ctx->backlight->props.state |= BL_CORE_FBBLANK;
backlight_update_status(ctx->backlight);
}
return 0;
}
@ -370,7 +356,6 @@ static const struct drm_panel_funcs st7789v_drm_funcs = {
static int st7789v_probe(struct spi_device *spi)
{
struct device_node *backlight;
struct st7789v *ctx;
int ret;
@ -394,26 +379,15 @@ static int st7789v_probe(struct spi_device *spi)
return PTR_ERR(ctx->reset);
}
backlight = of_parse_phandle(spi->dev.of_node, "backlight", 0);
if (backlight) {
ctx->backlight = of_find_backlight_by_node(backlight);
of_node_put(backlight);
if (!ctx->backlight)
return -EPROBE_DEFER;
}
ret = drm_panel_of_backlight(&ctx->panel);
if (ret)
return ret;
ret = drm_panel_add(&ctx->panel);
if (ret < 0)
goto err_free_backlight;
return ret;
return 0;
err_free_backlight:
if (ctx->backlight)
put_device(&ctx->backlight->dev);
return ret;
}
static int st7789v_remove(struct spi_device *spi)
@ -422,9 +396,6 @@ static int st7789v_remove(struct spi_device *spi)
drm_panel_remove(&ctx->panel);
if (ctx->backlight)
put_device(&ctx->backlight->dev);
return 0;
}