Use drm_panel infrastrucute:
- drm_panel has guards for calling disable/enable twice
- drm_panel has backlight support
To use the drm_panel infrastructure use the drm_panel_*
variants for prepare/enable/disable/unprepare.
Signed-off-by: Sam Ravnborg <s...@ravnborg.org>
Cc: Thierry Reding <thierry.red...@gmail.com>
Cc: Sam Ravnborg <s...@ravnborg.org>
---
drivers/gpu/drm/panel/panel-simple.c | 73 +++++-----------------------
1 file changed, 11 insertions(+), 62 deletions(-)
diff --git a/drivers/gpu/drm/panel/panel-simple.c
b/drivers/gpu/drm/panel/panel-simple.c
index bff7578f84dd..c7eed34f2c9c 100644
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -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>
@@ -98,13 +97,10 @@ struct panel_desc {
struct panel_simple {
struct drm_panel base;
- bool prepared;
- bool enabled;
bool no_hpd;
const struct panel_desc *desc;
- struct backlight_device *backlight;
struct regulator *supply;
struct i2c_adapter *ddc;
@@ -232,20 +228,9 @@ static int panel_simple_disable(struct drm_panel *panel)
{
struct panel_simple *p = to_panel_simple(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);
- p->enabled = false;
-
return 0;
}
@@ -253,9 +238,6 @@ static int panel_simple_unprepare(struct drm_panel *panel)
{
struct panel_simple *p = to_panel_simple(panel);
- if (!p->prepared)
- return 0;
-
gpiod_set_value_cansleep(p->enable_gpio, 0);
regulator_disable(p->supply);
@@ -263,8 +245,6 @@ static int panel_simple_unprepare(struct drm_panel *panel)
if (p->desc->delay.unprepare)
msleep(p->desc->delay.unprepare);
- p->prepared = false;
-
return 0;
}
@@ -274,9 +254,6 @@ static int panel_simple_prepare(struct drm_panel *panel)
unsigned int delay;
int err;
- if (p->prepared)
- return 0;
-
err = regulator_enable(p->supply);
if (err < 0) {
dev_err(panel->dev, "failed to enable supply: %d\n", err);
@@ -291,8 +268,6 @@ static int panel_simple_prepare(struct drm_panel *panel)
if (delay)
msleep(delay);
- p->prepared = true;
-
return 0;
}
@@ -300,20 +275,9 @@ static int panel_simple_enable(struct drm_panel *panel)
{
struct panel_simple *p = to_panel_simple(panel);
- if (p->enabled)
- return 0;
-
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;
}
@@ -413,7 +377,7 @@ 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 device_node *ddc;
struct panel_simple *panel;
struct display_timing dt;
int err;
@@ -422,8 +386,6 @@ static int panel_simple_probe(struct device *dev, const
struct panel_desc *desc)
if (!panel)
return -ENOMEM;
- panel->enabled = false;
- panel->prepared = false;
panel->desc = desc;
panel->no_hpd = of_property_read_bool(dev->of_node, "no-hpd");
@@ -441,24 +403,13 @@ 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 +419,10 @@ static int panel_simple_probe(struct device *dev, const
struct panel_desc *desc)
panel->base.dev = dev;
panel->base.funcs = &panel_simple_funcs;
+ 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 +434,6 @@ 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;
}
@@ -492,15 +444,12 @@ static int panel_simple_remove(struct device *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 +457,8 @@ 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 = {
--
2.20.1
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