drm/panel: truly: Add additional delay after pulling down reset gpio

MTP SDM845 panel seems to need additional delay to bring panel
to a workable state. Running modetest without this change displays
blurry artifacts.

Signed-off-by: Vivek Gautam <vivek.gautam@codeaurora.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20190527102616.28315-1-vivek.gautam@codeaurora.org

diff --git a/drivers/gpu/drm/panel/panel-truly-nt35597.c b/drivers/gpu/drm/panel/panel-truly-nt35597.c
index b68b1426e8cc6f956f7bbf12e60b4075c627adec..77e1311b7c6921a51596c982a28c870895a34976 100644 (file)
--- a/drivers/gpu/drm/panel/panel-truly-nt35597.c
+++ b/drivers/gpu/drm/panel/panel-truly-nt35597.c
@@ -284,6 +284,7 @@ static int truly_35597_power_on(struct truly_nt35597 *ctx)
        gpiod_set_value(ctx->reset_gpio, 1);
        usleep_range(10000, 20000);
        gpiod_set_value(ctx->reset_gpio, 0);
+       usleep_range(10000, 20000);
 
        return 0;
 }