linux-kernel - [RFT PATCH v2 12/48] drm/panel: kingdisplay-kd097d04: Stop tracking prepared/enabled

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Date: Fri,  3 May 2024 14:32:53 -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>,
	Brian Norris <briannorris@...omium.org>,
	Chris Zhong <zyw@...k-chips.com>,
	Nickey Yang <nickey.yang@...k-chips.com>,
	Heiko Stübner <heiko@...ech.de>,
	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 12/48] drm/panel: kingdisplay-kd097d04: 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: Brian Norris <briannorris@...omium.org>
Cc: Chris Zhong <zyw@...k-chips.com>
Cc: Nickey Yang <nickey.yang@...k-chips.com>
Cc: "Heiko Stübner" <heiko@...ech.de>
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.

 .../drm/panel/panel-kingdisplay-kd097d04.c    | 31 -------------------
 1 file changed, 31 deletions(-)

diff --git a/drivers/gpu/drm/panel/panel-kingdisplay-kd097d04.c b/drivers/gpu/drm/panel/panel-kingdisplay-kd097d04.c
index 17f8d80cf2b3..88d775e000d4 100644
--- a/drivers/gpu/drm/panel/panel-kingdisplay-kd097d04.c
+++ b/drivers/gpu/drm/panel/panel-kingdisplay-kd097d04.c
@@ -23,9 +23,6 @@ struct kingdisplay_panel {
 
 	struct regulator *supply;
 	struct gpio_desc *enable_gpio;
-
-	bool prepared;
-	bool enabled;
 };
 
 struct kingdisplay_panel_cmd {
@@ -185,15 +182,10 @@ static int kingdisplay_panel_disable(struct drm_panel *panel)
 	struct kingdisplay_panel *kingdisplay = to_kingdisplay_panel(panel);
 	int err;
 
-	if (!kingdisplay->enabled)
-		return 0;
-
 	err = mipi_dsi_dcs_set_display_off(kingdisplay->link);
 	if (err < 0)
 		dev_err(panel->dev, "failed to set display off: %d\n", err);
 
-	kingdisplay->enabled = false;
-
 	return 0;
 }
 
@@ -202,9 +194,6 @@ static int kingdisplay_panel_unprepare(struct drm_panel *panel)
 	struct kingdisplay_panel *kingdisplay = to_kingdisplay_panel(panel);
 	int err;
 
-	if (!kingdisplay->prepared)
-		return 0;
-
 	err = mipi_dsi_dcs_enter_sleep_mode(kingdisplay->link);
 	if (err < 0) {
 		dev_err(panel->dev, "failed to enter sleep mode: %d\n", err);
@@ -220,8 +209,6 @@ static int kingdisplay_panel_unprepare(struct drm_panel *panel)
 	if (err < 0)
 		return err;
 
-	kingdisplay->prepared = false;
-
 	return 0;
 }
 
@@ -231,9 +218,6 @@ static int kingdisplay_panel_prepare(struct drm_panel *panel)
 	int err, regulator_err;
 	unsigned int i;
 
-	if (kingdisplay->prepared)
-		return 0;
-
 	gpiod_set_value_cansleep(kingdisplay->enable_gpio, 0);
 
 	err = regulator_enable(kingdisplay->supply);
@@ -275,8 +259,6 @@ static int kingdisplay_panel_prepare(struct drm_panel *panel)
 	/* T7: 10ms */
 	usleep_range(10000, 11000);
 
-	kingdisplay->prepared = true;
-
 	return 0;
 
 poweroff:
@@ -289,18 +271,6 @@ static int kingdisplay_panel_prepare(struct drm_panel *panel)
 	return err;
 }
 
-static int kingdisplay_panel_enable(struct drm_panel *panel)
-{
-	struct kingdisplay_panel *kingdisplay = to_kingdisplay_panel(panel);
-
-	if (kingdisplay->enabled)
-		return 0;
-
-	kingdisplay->enabled = true;
-
-	return 0;
-}
-
 static const struct drm_display_mode default_mode = {
 	.clock = 229000,
 	.hdisplay = 1536,
@@ -341,7 +311,6 @@ static const struct drm_panel_funcs kingdisplay_panel_funcs = {
 	.disable = kingdisplay_panel_disable,
 	.unprepare = kingdisplay_panel_unprepare,
 	.prepare = kingdisplay_panel_prepare,
-	.enable = kingdisplay_panel_enable,
 	.get_modes = kingdisplay_panel_get_modes,
 };
 
-- 
2.45.0.rc1.225.g2a3ae87e7f-goog