drm/panel: sharp-lq101r1sx01: Stop tracking prepared/enabled

As talked about in commit d2aacaf0 ("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: Thierry Reding <treding@nvidia.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Maxime Ripard <mripard@kernel.org>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20240604172305.v3.17.Ifd6b12b8a4bca7d492e892ea7455e83f5c0ab5a8@changeidSigned-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240604172305.v3.17.Ifd6b12b8a4bca7d492e892ea7455e83f5c0ab5a8@changeid

drivers/gpu/drm/panel/panel-sharp-lq101r1sx01.c

@@ -24,9 +24,6 @@ struct sharp_panel {
 
 	struct regulator *supply;
 
-	bool prepared;
-	bool enabled;
-
 	const struct drm_display_mode *mode;
 };
 
@@ -85,26 +82,11 @@ static __maybe_unused int sharp_panel_read(struct sharp_panel *sharp,
 	return err;
 }
 
-static int sharp_panel_disable(struct drm_panel *panel)
-{
-	struct sharp_panel *sharp = to_sharp_panel(panel);
-
-	if (!sharp->enabled)
-		return 0;
-
-	sharp->enabled = false;
-
-	return 0;
-}
-
 static int sharp_panel_unprepare(struct drm_panel *panel)
 {
 	struct sharp_panel *sharp = to_sharp_panel(panel);
 	int err;
 
-	if (!sharp->prepared)
-		return 0;
-
 	sharp_wait_frames(sharp, 4);
 
 	err = mipi_dsi_dcs_set_display_off(sharp->link1);
@@ -119,8 +101,6 @@ static int sharp_panel_unprepare(struct drm_panel *panel)
 
 	regulator_disable(sharp->supply);
 
-	sharp->prepared = false;
-
 	return 0;
 }
 
@@ -164,9 +144,6 @@ static int sharp_panel_prepare(struct drm_panel *panel)
 	u8 format = MIPI_DCS_PIXEL_FMT_24BIT;
 	int err;
 
-	if (sharp->prepared)
-		return 0;
-
 	err = regulator_enable(sharp->supply);
 	if (err < 0)
 		return err;
@@ -235,8 +212,6 @@ static int sharp_panel_prepare(struct drm_panel *panel)
 		goto poweroff;
 	}
 
-	sharp->prepared = true;
-
 	/* wait for 6 frames before continuing */
 	sharp_wait_frames(sharp, 6);
 
@@ -247,18 +222,6 @@ static int sharp_panel_prepare(struct drm_panel *panel)
 	return err;
 }
 
-static int sharp_panel_enable(struct drm_panel *panel)
-{
-	struct sharp_panel *sharp = to_sharp_panel(panel);
-
-	if (sharp->enabled)
-		return 0;
-
-	sharp->enabled = true;
-
-	return 0;
-}
-
 static const struct drm_display_mode default_mode = {
 	.clock = 278000,
 	.hdisplay = 2560,
@@ -295,10 +258,8 @@ static int sharp_panel_get_modes(struct drm_panel *panel,
 }
 
 static const struct drm_panel_funcs sharp_panel_funcs = {
-	.disable = sharp_panel_disable,
 	.unprepare = sharp_panel_unprepare,
 	.prepare = sharp_panel_prepare,
-	.enable = sharp_panel_enable,
 	.get_modes = sharp_panel_get_modes,
 };