TWxSoftware/twx-linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

drm/panel: simple: Add reset gpio

Browse Source 
Change-Id: I12a4495a5897535b2a2fe8117a626ee7639dfef0
Signed-off-by: Wyon Bi <bivvy.bi@rock-chips.com>
This commit is contained in:
Wyon Bi
2019-07-04 09:14:54 +08:00
parent 0f36136db1
commit 968a5ee200
2 changed files with 26 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
Documentation/devicetree/bindings/display/panel/simple-panel.txt
+3
View File
@@ -14,6 +14,7 @@ Required properties:
Optional properties:
- ddc-i2c-bus: phandle of an I2C controller used for DDC EDID probing
- enable-gpios: GPIO pin to enable or disable the panel
- reset-gpios: GPIO pin to reset the panel
- backlight: phandle of the backlight device attached to the panel
- prepare-delay-ms: the time (in milliseconds) that it takes for the panel to
become ready and start receiving video data
@@ -24,6 +25,8 @@ Optional properties:
turn the display off (no content is visible)
- unprepare-delay-ms: the time (in milliseconds) that it takes for the panel
to power itself down completely
- reset-delay-ms: the time (in milliseconds) that it takes for the panel to
reset itself completely
- width-mm: width (in millimeters) of the panel's active display area
- height-mm: height (in millimeters) of the panel's active display area
- bpc: bits per color/component
drivers/gpu/drm/panel/panel-simple.c
+23 -1
View File
@@ -64,12 +64,15 @@ struct panel_desc {
* turn the display off (no content is visible)
* @unprepare: the time (in milliseconds) that it takes for the panel
* to power itself down completely
* @reset: the time (in milliseconds) that it takes for the panel
* to reset itself completely
*/
struct {
unsigned int prepare;
unsigned int enable;
unsigned int disable;
unsigned int unprepare;
unsigned int reset;
} delay;
u32 bus_format;
@@ -89,6 +92,7 @@ struct panel_simple {
struct i2c_adapter *ddc;
struct gpio_desc *enable_gpio;
struct gpio_desc *reset_gpio;
};
static inline struct panel_simple *to_panel_simple(struct drm_panel *panel)
@@ -252,6 +256,8 @@ static int panel_simple_unprepare(struct drm_panel *panel)
if (!p->prepared)
return 0;
gpiod_direction_output(p->reset_gpio, 1);
gpiod_direction_output(p->enable_gpio, 0);
panel_simple_regulator_disable(panel);
@@ -283,6 +289,13 @@ static int panel_simple_prepare(struct drm_panel *panel)
if (p->desc->delay.prepare)
msleep(p->desc->delay.prepare);
gpiod_direction_output(p->reset_gpio, 1);
if (p->desc->delay.reset)
msleep(p->desc->delay.reset);
gpiod_direction_output(p->reset_gpio, 0);
p->prepared = true;
return 0;
@@ -380,7 +393,15 @@ static int panel_simple_probe(struct device *dev, const struct panel_desc *desc)
if (IS_ERR(panel->enable_gpio)) {
err = PTR_ERR(panel->enable_gpio);
if (err != -EPROBE_DEFER)
dev_err(dev, "failed to request GPIO: %d\n", err);
dev_err(dev, "failed to get enable GPIO: %d\n", err);
return err;
}
panel->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_ASIS);
if (IS_ERR(panel->reset_gpio)) {
err = PTR_ERR(panel->reset_gpio);
if (err != -EPROBE_DEFER)
dev_err(dev, "failed to get reset GPIO: %d\n", err);
return err;
}
@@ -2678,6 +2699,7 @@ static int panel_simple_of_get_desc_data(struct device *dev,
of_property_read_u32(np, "enable-delay-ms", &desc->delay.enable);
of_property_read_u32(np, "disable-delay-ms", &desc->delay.disable);
of_property_read_u32(np, "unprepare-delay-ms", &desc->delay.unprepare);
of_property_read_u32(np, "reset-delay-ms", &desc->delay.reset);
of_property_read_u32(np, "bus-format", &desc->bus_format);
return 0;