linux-kernel - [PATCH 5.19 11/38] drm/panel-edp: Fix delays for Innolux N116BCA-EA1

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Date:   Wed, 21 Sep 2022 17:45:55 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Douglas Anderson <dianders@...omium.org>,
        Chen-Yu Tsai <wenst@...omium.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.19 11/38] drm/panel-edp: Fix delays for Innolux N116BCA-EA1

From: Chen-Yu Tsai <wenst@...omium.org>

[ Upstream commit 8f7115c1923cd11146525f1615beb29018001964 ]

Commit 52824ca4502d ("drm/panel-edp: Better describe eDP panel delays")
clarified the various delays used for eDP panels, tying them to the eDP
panel timing diagram.

For Innolux N116BCA-EA1, .prepare_to_enable would be:

    t4_min + t5_min + t6_min + max(t7_max, t8_min)

Since t4_min and t5_min are both 0, the panel can use either .enable or
.prepare_to_enable.

As .enable is better defined, switch to using .enable for this panel.

Also add .disable = 50, based on the datasheet's t9_min value. This
effectively makes the delays the same as delay_200_500_e80_d50.

Cc: Douglas Anderson <dianders@...omium.org>
Fixes: 51d35631c970 ("drm/panel-simple: Add N116BCA-EA1")
Signed-off-by: Chen-Yu Tsai <wenst@...omium.org>
Reviewed-by: Douglas Anderson <dianders@...omium.org>
Signed-off-by: Douglas Anderson <dianders@...omium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220908085454.1024167-1-wenst@chromium.org
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/panel/panel-edp.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/panel/panel-edp.c b/drivers/gpu/drm/panel/panel-edp.c
index a189982601a4..e8040defe607 100644
--- a/drivers/gpu/drm/panel/panel-edp.c
+++ b/drivers/gpu/drm/panel/panel-edp.c
@@ -1270,7 +1270,8 @@ static const struct panel_desc innolux_n116bca_ea1 = {
 	},
 	.delay = {
 		.hpd_absent = 200,
-		.prepare_to_enable = 80,
+		.enable = 80,
+		.disable = 50,
 		.unprepare = 500,
 	},
 };
-- 
2.35.1