Use the backlight support in drm_panel to simplify the driver
Signed-off-by: Sam Ravnborg <sam@xxxxxxxxxxxx>
Cc: Linus Walleij <linus.walleij@xxxxxxxxxx>
Cc: Thierry Reding <thierry.reding@xxxxxxxxx>
Cc: Sam Ravnborg <sam@xxxxxxxxxxxx>
---
drivers/gpu/drm/panel/panel-tpo-tpg110.c | 20 ++++++--------------
1 file changed, 6 insertions(+), 14 deletions(-)
diff --git a/drivers/gpu/drm/panel/panel-tpo-tpg110.c b/drivers/gpu/drm/panel/panel-tpo-tpg110.c
index bee213ea1a42..8472d018c16f 100644
--- a/drivers/gpu/drm/panel/panel-tpo-tpg110.c
+++ b/drivers/gpu/drm/panel/panel-tpo-tpg110.c
@@ -14,13 +14,13 @@
#include <drm/drm_panel.h>
#include <drm/drm_print.h>
-#include <linux/backlight.h>
#include <linux/bitops.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
+#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/spi/spi.h>
@@ -76,10 +76,6 @@ struct tpg110 {
* @panel: the DRM panel instance for this device
*/
struct drm_panel panel;
- /**
- * @backlight: backlight for this panel
- */
- struct backlight_device *backlight;
/**
* @panel_type: the panel mode as detected
*/
@@ -356,8 +352,6 @@ static int tpg110_disable(struct drm_panel *panel)
val &= ~TPG110_CTRL2_PM;
tpg110_write_reg(tpg, TPG110_CTRL2_PM, val);
- backlight_disable(tpg->backlight);
-
return 0;
}
@@ -366,8 +360,6 @@ static int tpg110_enable(struct drm_panel *panel)
struct tpg110 *tpg = to_tpg110(panel);
u8 val;
- backlight_enable(tpg->backlight);
-
/* Take chip out of standby */
val = tpg110_read_reg(tpg, TPG110_CTRL2_PM);
val |= TPG110_CTRL2_PM;
@@ -432,11 +424,6 @@ static int tpg110_probe(struct spi_device *spi)
if (ret)
DRM_DEV_ERROR(dev, "no panel height specified\n");
- /* Look for some optional backlight */
- tpg->backlight = devm_of_find_backlight(dev);
- if (IS_ERR(tpg->backlight))
- return PTR_ERR(tpg->backlight);
-
/* This asserts the GRESTB signal, putting the display into reset */
tpg->grestb = devm_gpiod_get(dev, "grestb", GPIOD_OUT_HIGH);
if (IS_ERR(tpg->grestb)) {
@@ -459,6 +446,11 @@ static int tpg110_probe(struct spi_device *spi)
drm_panel_init(&tpg->panel, dev, &tpg110_drm_funcs,
DRM_MODE_CONNECTOR_DPI);
+
+ ret = drm_panel_of_backlight(&tpg->panel);
+ if (ret)
+ return ret;
+
spi_set_drvdata(spi, tpg);
return drm_panel_add(&tpg->panel);
--
2.20.1
