drm/panel: ltk050h3146w: Stop tracking prepared

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.

Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Maxime Ripard <mripard@kernel.org>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: Quentin Schulz <quentin.schulz@cherry.de>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240503143327.RFT.v2.14.I264417152e65b4a2e374666010666fa1c2d973fc@changeid

diff --git a/drivers/gpu/drm/panel/panel-leadtek-ltk050h3146w.c b/drivers/gpu/drm/panel/panel-leadtek-ltk050h3146w.c
index 1a26205701b5edb72c6d00ad6a374c1780af7535..5894bf30524a88d895df64e519e4c137a2c5c76c 100644 (file)
--- a/drivers/gpu/drm/panel/panel-leadtek-ltk050h3146w.c
+++ b/drivers/gpu/drm/panel/panel-leadtek-ltk050h3146w.c
@@ -36,7 +36,6 @@ struct ltk050h3146w {
        struct regulator *vci;
        struct regulator *iovcc;
        const struct ltk050h3146w_desc *panel_desc;
-       bool prepared;
 };
 
 static const struct ltk050h3146w_cmd page1_cmds[] = {
@@ -521,9 +520,6 @@ static int ltk050h3146w_unprepare(struct drm_panel *panel)
        struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
        int ret;
 
-       if (!ctx->prepared)
-               return 0;
-
        ret = mipi_dsi_dcs_set_display_off(dsi);
        if (ret < 0) {
                dev_err(ctx->dev, "failed to set display off: %d\n", ret);
@@ -539,8 +535,6 @@ static int ltk050h3146w_unprepare(struct drm_panel *panel)
        regulator_disable(ctx->iovcc);
        regulator_disable(ctx->vci);
 
-       ctx->prepared = false;
-
        return 0;
 }
 
@@ -550,9 +544,6 @@ static int ltk050h3146w_prepare(struct drm_panel *panel)
        struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
        int ret;
 
-       if (ctx->prepared)
-               return 0;
-
        dev_dbg(ctx->dev, "Resetting the panel\n");
        ret = regulator_enable(ctx->vci);
        if (ret < 0) {
@@ -593,8 +584,6 @@ static int ltk050h3146w_prepare(struct drm_panel *panel)
 
        msleep(50);
 
-       ctx->prepared = true;
-
        return 0;
 
 disable_iovcc: