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@cr... Signed-off-by: Sasha Levin sashal@kernel.org --- 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 346e3f9fd505a..a68eff1fb4297 100644 --- a/drivers/gpu/drm/panel/panel-simple.c +++ b/drivers/gpu/drm/panel/panel-simple.c @@ -1537,7 +1537,7 @@ 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 = {