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Commit f673c37e authored by Ajay Kumar's avatar Ajay Kumar Committed by Thierry Reding
Browse files

drm/panel: simple: Support delays in panel functions 



For most of the panels, we need to provide delays during various stages
of panel power up and power down. Add a structure to hold those delay
values and use them in corresponding functions.

Signed-off-by: default avatarAjay Kumar <ajaykumar.rs@samsung.com>
Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
parent 613a633e

drivers/gpu/drm/panel/panel-simple.c

+30 −0
Original line number Diff line number Diff line
@@ -43,6 +43,24 @@ 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 itself down completely

	 */

	struct {

		unsigned int prepare;

		unsigned int enable;

		unsigned int disable;

		unsigned int unprepare;

	} delay;

};



struct panel_simple {
@@ -109,6 +127,9 @@ 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;
@@ -126,6 +147,9 @@ 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;
@@ -148,6 +172,9 @@ 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;
@@ -160,6 +187,9 @@ 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);