From 613a633e7a567593efc03dc2357b6d25cd365c10 Mon Sep 17 00:00:00 2001 From: Ajay Kumar Date: Thu, 31 Jul 2014 23:12:10 +0530 Subject: [PATCH] drm/panel: simple: Add proper definition for prepare and unprepare Move out code from enable and disable routines to prepare and unprepare routines, so that functionality is properly distributed across all the panel functions. Signed-off-by: Ajay Kumar Signed-off-by: Thierry Reding --- drivers/gpu/drm/panel/panel-simple.c | 37 ++++++++++++++++++++-------- 1 file changed, 27 insertions(+), 10 deletions(-) diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c index 4bf33c6b42f0..806beae77938 100644 --- a/drivers/gpu/drm/panel/panel-simple.c +++ b/drivers/gpu/drm/panel/panel-simple.c @@ -47,6 +47,7 @@ struct panel_desc { struct panel_simple { struct drm_panel base; + bool prepared; bool enabled; const struct panel_desc *desc; @@ -108,10 +109,6 @@ static int panel_simple_disable(struct drm_panel *panel) backlight_update_status(p->backlight); } - if (p->enable_gpio) - gpiod_set_value_cansleep(p->enable_gpio, 0); - - regulator_disable(p->supply); p->enabled = false; return 0; @@ -119,20 +116,27 @@ static int panel_simple_disable(struct drm_panel *panel) static int panel_simple_unprepare(struct drm_panel *panel) { - return 0; -} + struct panel_simple *p = to_panel_simple(panel); + + if (!p->prepared) + return 0; + + if (p->enable_gpio) + gpiod_set_value_cansleep(p->enable_gpio, 0); + + regulator_disable(p->supply); + + p->prepared = false; -static int panel_simple_prepare(struct drm_panel *panel) -{ return 0; } -static int panel_simple_enable(struct drm_panel *panel) +static int panel_simple_prepare(struct drm_panel *panel) { struct panel_simple *p = to_panel_simple(panel); int err; - if (p->enabled) + if (p->prepared) return 0; err = regulator_enable(p->supply); @@ -144,6 +148,18 @@ static int panel_simple_enable(struct drm_panel *panel) if (p->enable_gpio) gpiod_set_value_cansleep(p->enable_gpio, 1); + p->prepared = true; + + return 0; +} + +static int panel_simple_enable(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_UNBLANK; backlight_update_status(p->backlight); @@ -194,6 +210,7 @@ static int panel_simple_probe(struct device *dev, const struct panel_desc *desc) return -ENOMEM; panel->enabled = false; + panel->prepared = false; panel->desc = desc; panel->supply = devm_regulator_get(dev, "power"); -- 2.20.1