drm/panel: simple: Correct minimum hsync length of the HannStar HSD070PWW1 panel

According to the data sheet, the minimum horizontal blanking interval
is 54 clocks (1 + 52 + 1), but tests with a Nitrogen6X have shown the
minimum working horizontal blanking interval to be 60 clocks.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Thierry Reding <treding@nvidia.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
index a1cd431e17a6..39e9dffe07d9 100644
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -713,7 +713,12 @@ static const struct display_timing hannstar_hsd070pww1_timing = {
         .hactive = { 1280, 1280, 1280 },
         .hfront_porch = { 1, 1, 10 },
         .hback_porch = { 1, 1, 10 },
-        .hsync_len = { 52, 158, 661 },
+        /*
+         * According to the data sheet, the minimum horizontal blanking interval
+         * is 54 clocks (1 + 52 + 1), but tests with a Nitrogen6X have shown the
+         * minimum working horizontal blanking interval to be 60 clocks.
+         */
+        .hsync_len = { 58, 158, 661 },
         .vactive = { 800, 800, 800 },
         .vfront_porch = { 1, 1, 10 },
         .vback_porch = { 1, 1, 10 },