linux-kernel - [RFT PATCH v2 36/48] drm/panel: seiko-43wvf1g: Stop tracking prepared/enabled

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Message-ID: <20240503143327.RFT.v2.36.Idda91d310ca2e4f5a4ab4ca6eaf1afdaf14eeb51@changeid>
Date: Fri,  3 May 2024 14:33:17 -0700
From: Douglas Anderson <dianders@...omium.org>
To: dri-devel@...ts.freedesktop.org,
	Maxime Ripard <mripard@...nel.org>
Cc: Linus Walleij <linus.walleij@...aro.org>,
	Chris Morgan <macromorgan@...mail.com>,
	Yuran Pereira <yuran.pereira@...mail.com>,
	Neil Armstrong <neil.armstrong@...aro.org>,
	Douglas Anderson <dianders@...omium.org>,
	Marco Franchi <marco.franchi@....com>,
	Fabio Estevam <festevam@...x.de>,
	Laurentiu Palcu <laurentiu.palcu@....nxp.com>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	imx@...ts.linux.dev,
	Daniel Vetter <daniel@...ll.ch>,
	David Airlie <airlied@...il.com>,
	Jessica Zhang <quic_jesszhan@...cinc.com>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Sam Ravnborg <sam@...nborg.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	linux-kernel@...r.kernel.org
Subject: [RFT PATCH v2 36/48] drm/panel: seiko-43wvf1g: Stop tracking prepared/enabled

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.

Cc: Marco Franchi <marco.franchi@....com>
Cc: Fabio Estevam <festevam@...x.de>
Cc: Laurentiu Palcu <laurentiu.palcu@....nxp.com>
Cc: Pengutronix Kernel Team <kernel@...gutronix.de>
Cc: imx@...ts.linux.dev
Signed-off-by: Douglas Anderson <dianders@...omium.org>
---

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

 drivers/gpu/drm/panel/panel-seiko-43wvf1g.c | 40 ---------------------
 1 file changed, 40 deletions(-)

diff --git a/drivers/gpu/drm/panel/panel-seiko-43wvf1g.c b/drivers/gpu/drm/panel/panel-seiko-43wvf1g.c
index 658c7c040570..98480904126c 100644
--- a/drivers/gpu/drm/panel/panel-seiko-43wvf1g.c
+++ b/drivers/gpu/drm/panel/panel-seiko-43wvf1g.c
@@ -44,8 +44,6 @@ struct seiko_panel_desc {
 
 struct seiko_panel {
 	struct drm_panel base;
-	bool prepared;
-	bool enabled;
 	const struct seiko_panel_desc *desc;
 	struct regulator *dvdd;
 	struct regulator *avdd;
@@ -122,25 +120,10 @@ static int seiko_panel_get_fixed_modes(struct seiko_panel *panel,
 	return num;
 }
 
-static int seiko_panel_disable(struct drm_panel *panel)
-{
-	struct seiko_panel *p = to_seiko_panel(panel);
-
-	if (!p->enabled)
-		return 0;
-
-	p->enabled = false;
-
-	return 0;
-}
-
 static int seiko_panel_unprepare(struct drm_panel *panel)
 {
 	struct seiko_panel *p = to_seiko_panel(panel);
 
-	if (!p->prepared)
-		return 0;
-
 	gpiod_set_value_cansleep(p->enable_gpio, 0);
 
 	regulator_disable(p->avdd);
@@ -150,8 +133,6 @@ static int seiko_panel_unprepare(struct drm_panel *panel)
 
 	regulator_disable(p->dvdd);
 
-	p->prepared = false;
-
 	return 0;
 }
 
@@ -160,9 +141,6 @@ static int seiko_panel_prepare(struct drm_panel *panel)
 	struct seiko_panel *p = to_seiko_panel(panel);
 	int err;
 
-	if (p->prepared)
-		return 0;
-
 	err = regulator_enable(p->dvdd);
 	if (err < 0) {
 		dev_err(panel->dev, "failed to enable dvdd: %d\n", err);
@@ -180,8 +158,6 @@ static int seiko_panel_prepare(struct drm_panel *panel)
 
 	gpiod_set_value_cansleep(p->enable_gpio, 1);
 
-	p->prepared = true;
-
 	return 0;
 
 disable_dvdd:
@@ -189,18 +165,6 @@ static int seiko_panel_prepare(struct drm_panel *panel)
 	return err;
 }
 
-static int seiko_panel_enable(struct drm_panel *panel)
-{
-	struct seiko_panel *p = to_seiko_panel(panel);
-
-	if (p->enabled)
-		return 0;
-
-	p->enabled = true;
-
-	return 0;
-}
-
 static int seiko_panel_get_modes(struct drm_panel *panel,
 				 struct drm_connector *connector)
 {
@@ -228,10 +192,8 @@ static int seiko_panel_get_timings(struct drm_panel *panel,
 }
 
 static const struct drm_panel_funcs seiko_panel_funcs = {
-	.disable = seiko_panel_disable,
 	.unprepare = seiko_panel_unprepare,
 	.prepare = seiko_panel_prepare,
-	.enable = seiko_panel_enable,
 	.get_modes = seiko_panel_get_modes,
 	.get_timings = seiko_panel_get_timings,
 };
@@ -246,8 +208,6 @@ static int seiko_panel_probe(struct device *dev,
 	if (!panel)
 		return -ENOMEM;
 
-	panel->enabled = false;
-	panel->prepared = false;
 	panel->desc = desc;
 
 	panel->dvdd = devm_regulator_get(dev, "dvdd");
-- 
2.45.0.rc1.225.g2a3ae87e7f-goog