For most of the panels, we need to provide delays during various stages of panel powerup/powerdown.
So, Add a structure to hold those delay values and use them in corresponding functions.
Signed-off-by: Ajay Kumar ajaykumar.rs@samsung.com --- drivers/gpu/drm/panel/panel-simple.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+)
diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c index 9801728..d6e92ea 100644 --- a/drivers/gpu/drm/panel/panel-simple.c +++ b/drivers/gpu/drm/panel/panel-simple.c @@ -41,6 +41,24 @@ struct panel_desc { unsigned int width; unsigned int height; } size; + + /** + * @prepare: the time (in milliseconds) that it takes for the panel + * to become ready and start receiving video data + * @enable: the time (in milliseconds) that it takes for the panel + * to display the first valid frame after starting to + * receive video data + * @disable: the time (in milliseconds) that it takes for the panel + * to turn the display off (no content is visible) + * @unprepare: the time (in milliseconds) that it takes for the panel + * to power down itself completely + */ + struct { + unsigned int prepare; + unsigned int enable; + unsigned int disable; + unsigned int unprepare; + } delay; };
struct panel_simple { @@ -106,6 +124,9 @@ static int panel_simple_disable(struct drm_panel *panel) backlight_update_status(p->backlight); }
+ if (p->desc->delay.disable) + msleep(p->desc->delay.disable); + p->enabled = false;
return 0; @@ -123,6 +144,9 @@ static int panel_simple_unprepare(struct drm_panel *panel)
regulator_disable(p->supply);
+ if (p->desc->delay.unprepare) + msleep(p->desc->delay.unprepare); + p->prepared = false;
return 0; @@ -145,6 +169,9 @@ static int panel_simple_prepare(struct drm_panel *panel) if (p->enable_gpio) gpiod_set_value_cansleep(p->enable_gpio, 1);
+ if (p->desc->delay.prepare) + msleep(p->desc->delay.prepare); + p->prepared = true;
return 0; @@ -157,6 +184,9 @@ static int panel_simple_enable(struct drm_panel *panel) if (p->enabled) return 0;
+ if (p->desc->delay.enable) + msleep(p->desc->delay.enable); + if (p->backlight) { p->backlight->props.power = FB_BLANK_UNBLANK; backlight_update_status(p->backlight);