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drm/panel: simple: use drm_panel backlight support 

Use drm_panel infrastructure for backlight.
Replace direct calls with drm_panel_*() calls
to utilize the drm_panel support.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
cc: 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/20191207140353.23967-4-sam@ravnborg.org
This commit is contained in:
Sam Ravnborg 2019-12-07 15:03:31 +01:00
parent 152dbdeab1
commit 0fe1564bd6
1 changed files with 11 additions and 39 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

50
drivers/gpu/drm/panel/panel-simple.c
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@ -21,7 +21,6 @@
* DEALINGS IN THE SOFTWARE.
*/
#include <linux/backlight.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/module.h>
@ -105,7 +104,6 @@ struct panel_simple {
const struct panel_desc *desc;
struct backlight_device *backlight;
struct regulator *supply;
struct i2c_adapter *ddc;
@ -236,12 +234,6 @@ static int panel_simple_disable(struct drm_panel *panel)
if (!p->enabled)
return 0;
if (p->backlight) {
p->backlight->props.power = FB_BLANK_POWERDOWN;
p->backlight->props.state |= BL_CORE_FBBLANK;
backlight_update_status(p->backlight);
}
if (p->desc->delay.disable)
msleep(p->desc->delay.disable);
@ -307,12 +299,6 @@ static int panel_simple_enable(struct drm_panel *panel)
if (p->desc->delay.enable)
msleep(p->desc->delay.enable);
if (p->backlight) {
p->backlight->props.state &= ~BL_CORE_FBBLANK;
p->backlight->props.power = FB_BLANK_UNBLANK;
backlight_update_status(p->backlight);
}
p->enabled = true;
return 0;
@ -414,9 +400,9 @@ static void panel_simple_parse_panel_timing_node(struct device *dev,
static int panel_simple_probe(struct device *dev, const struct panel_desc *desc)
{
struct device_node *backlight, *ddc;
struct panel_simple *panel;
struct display_timing dt;
struct device_node *ddc;
int err;
panel = devm_kzalloc(dev, sizeof(*panel), GFP_KERNEL);
@ -442,24 +428,13 @@ static int panel_simple_probe(struct device *dev, const struct panel_desc *desc)
return err;
}
backlight = of_parse_phandle(dev->of_node, "backlight", 0);
if (backlight) {
panel->backlight = of_find_backlight_by_node(backlight);
of_node_put(backlight);
if (!panel->backlight)
return -EPROBE_DEFER;
}
ddc = of_parse_phandle(dev->of_node, "ddc-i2c-bus", 0);
if (ddc) {
panel->ddc = of_find_i2c_adapter_by_node(ddc);
of_node_put(ddc);
if (!panel->ddc) {
err = -EPROBE_DEFER;
goto free_backlight;
}
if (!panel->ddc)
return -EPROBE_DEFER;
}
if (!of_get_display_timing(dev->of_node, "panel-timing", &dt))
@ -468,6 +443,10 @@ static int panel_simple_probe(struct device *dev, const struct panel_desc *desc)
drm_panel_init(&panel->base, dev, &panel_simple_funcs,
desc->connector_type);
err = drm_panel_of_backlight(&panel->base);
if (err)
goto free_ddc;
err = drm_panel_add(&panel->base);
if (err < 0)
goto free_ddc;
@ -479,9 +458,6 @@ static int panel_simple_probe(struct device *dev, const struct panel_desc *desc)
free_ddc:
if (panel->ddc)
put_device(&panel->ddc->dev);
free_backlight:
if (panel->backlight)
put_device(&panel->backlight->dev);
return err;
}
@ -491,16 +467,12 @@ static int panel_simple_remove(struct device *dev)
struct panel_simple *panel = dev_get_drvdata(dev);
drm_panel_remove(&panel->base);
panel_simple_disable(&panel->base);
panel_simple_unprepare(&panel->base);
drm_panel_disable(&panel->base);
drm_panel_unprepare(&panel->base);
if (panel->ddc)
put_device(&panel->ddc->dev);
if (panel->backlight)
put_device(&panel->backlight->dev);
return 0;
}
@ -508,8 +480,8 @@ static void panel_simple_shutdown(struct device *dev)
{
struct panel_simple *panel = dev_get_drvdata(dev);
panel_simple_disable(&panel->base);
panel_simple_unprepare(&panel->base);
drm_panel_disable(&panel->base);
drm_panel_unprepare(&panel->base);
}
static const struct drm_display_mode ampire_am_480272h3tmqw_t01h_mode = {