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[5.8,002/148] drm/panel-simple: Fix inverted V/H SYNC for Frida FRD350H54004 panel

Message ID 20200824082414.038213682@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg KH Aug. 24, 2020, 8:28 a.m. UTC 
From: Paul Cercueil <paul@crapouillou.net>

[ Upstream commit bad20a2dbfdfaf01560026909506b6ed69d65ba2 ]

The FRD350H54004 panel was marked as having active-high VSYNC and HSYNC
signals, which sorts-of worked, but resulted in the picture fading out
under certain circumstances.

Fix this issue by marking VSYNC and HSYNC signals active-low.

v2: Rebase on drm-misc-next

Fixes: 7b6bd8433609 ("drm/panel: simple: Add support for the Frida FRD350H54004 panel")
Cc: stable@vger.kernel.org # v5.5
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200716125647.10964-1-paul@crapouillou.net
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpu/drm/panel/panel-simple.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
index 444b77490a42a..7debf2ca42522 100644
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -1717,7 +1717,7 @@  static const struct drm_display_mode frida_frd350h54004_mode = {
 	.vsync_end = 240 + 2 + 6,
 	.vtotal = 240 + 2 + 6 + 2,
 	.vrefresh = 60,
-	.flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC,
+	.flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
 };
 
 static const struct panel_desc frida_frd350h54004 = {