[RFT,v2,26/48] drm/panel: simple: Stop tracking prepared/enabled

Commit Message

Doug Anderson May 3, 2024, 9:33 p.m. UTC

As talked about in commit d2aacaf07395 ("drm/panel: Check for already
prepared/enabled in drm_panel"), we want to remove needless code from
panel drivers that was storing and double-checking the
prepared/enabled state. Even if someone was relying on the
double-check before, that double-check is now in the core and not
needed in individual drivers.

Signed-off-by: Douglas Anderson <[e-mail]>
---

Changes in v2:
- Only handle 1 panel per patch.
- Split removal of prepared/enabled from handling of remove/shutdown.

 drivers/gpu/drm/panel/panel-simple.c | 27 ---------------------------
 1 file changed, 27 deletions(-)

Comments

Sui Jingfeng May 18, 2024, 1:20 p.m. UTC | #1

Hi,

On 2024/5/4 05:33, Douglas Anderson wrote:
> As talked about in commit d2aacaf07395 ("drm/panel: Check for already
> prepared/enabled in drm_panel"), we want to remove needless code from
> panel drivers that was storing and double-checking the
> prepared/enabled state. Even if someone was relying on the
> double-check before, that double-check is now in the core and not
> needed in individual drivers.


I think you are right, as I see drm_panel already has embed
the 'prepared' and 'enabled' as members, remove them from
the derived structure could probably save memory footprint.
Reducing boilerplate is also a side benefit.


> Signed-off-by: Douglas Anderson <[e-mail]>


Acked-by: Sui Jingfeng <[e-mail]>

Patch

diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
index dcb6d0b6ced0..42d902d2bbbe 100644
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -138,9 +138,6 @@  struct panel_desc {
 
 struct panel_simple {
 	struct drm_panel base;
-	bool enabled;
-
-	bool prepared;
 
 	ktime_t unprepared_time;
 
@@ -290,14 +287,9 @@  static int panel_simple_disable(struct drm_panel *panel)
 {
 	struct panel_simple *p = to_panel_simple(panel);
 
-	if (!p->enabled)
-		return 0;
-
 	if (p->desc->delay.disable)
 		msleep(p->desc->delay.disable);
 
-	p->enabled = false;
-
 	return 0;
 }
 
@@ -317,18 +309,12 @@  static int panel_simple_suspend(struct device *dev)
 
 static int panel_simple_unprepare(struct drm_panel *panel)
 {
-	struct panel_simple *p = to_panel_simple(panel);
 	int ret;
 
-	/* Unpreparing when already unprepared is a no-op */
-	if (!p->prepared)
-		return 0;
-
 	pm_runtime_mark_last_busy(panel->dev);
 	ret = pm_runtime_put_autosuspend(panel->dev);
 	if (ret < 0)
 		return ret;
-	p->prepared = false;
 
 	return 0;
 }
@@ -356,21 +342,14 @@  static int panel_simple_resume(struct device *dev)
 
 static int panel_simple_prepare(struct drm_panel *panel)
 {
-	struct panel_simple *p = to_panel_simple(panel);
 	int ret;
 
-	/* Preparing when already prepared is a no-op */
-	if (p->prepared)
-		return 0;
-
 	ret = pm_runtime_get_sync(panel->dev);
 	if (ret < 0) {
 		pm_runtime_put_autosuspend(panel->dev);
 		return ret;
 	}
 
-	p->prepared = true;
-
 	return 0;
 }
 
@@ -378,14 +357,9 @@  static int panel_simple_enable(struct drm_panel *panel)
 {
 	struct panel_simple *p = to_panel_simple(panel);
 
-	if (p->enabled)
-		return 0;
-
 	if (p->desc->delay.enable)
 		msleep(p->desc->delay.enable);
 
-	p->enabled = true;
-
 	return 0;
 }
 
@@ -609,7 +583,6 @@  static int panel_simple_probe(struct device *dev, const struct panel_desc *desc)
 	if (!panel)
 		return -ENOMEM;
 
-	panel->enabled = false;
 	panel->desc = desc;
 
 	panel->supply = devm_regulator_get(dev, "power");