From: Vivek Gautam <vivek.gautam@codeaurora.org>
Date: Mon, 27 May 2019 10:26:16 +0000 (+0530)
Subject: drm/panel: truly: Add additional delay after pulling down reset gpio
X-Git-Tag: v5.15~303^2~28^2~5199
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a5b8687869247c70ae114415d440798b01d8b952;p=platform%2Fkernel%2Flinux-starfive.git

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 b68b142..77e1311 100644
--- 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;
 }