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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 <ajaykumar.rs@samsung.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Ajay Kumar 2014-07-31 23:12:10 +05:30 committed by Thierry Reding
parent 1a670e7b8c
commit 613a633e7a
1 changed files with 27 additions and 10 deletions
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37
drivers/gpu/drm/panel/panel-simple.c
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@ -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)
{
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;
return 0;
}
static int panel_simple_prepare(struct drm_panel *panel)
{
return 0;
}
static int panel_simple_enable(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");