[PATCH 1/2] drm/panel-simple: Fix inverted V/H SYNC for Frida FRD350H54004 panel

[Paul Cercueil]

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.

Fixes: 7b6bd8433609 ("drm/panel: simple: Add support for the Frida FRD350H54004 panel")
Cc: stable at vger.kernel.org # v5.5
Signed-off-by: Paul Cercueil <paul at crapouillou.net>
---
 drivers/gpu/drm/panel/panel-simple.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
index 5178f87d6574..1188d191076b 100644
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -1703,7 +1703,7 @@ 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 = {
-- 
2.27.0