drm/edid: Add 6 bpc quirk for SDC panel in Lenovo G50

BugLink: https://bugs.launchpad.net/bugs/1851876
commit 11bcf5f78905b90baae8fb01e16650664ed0cb00 upstream.

Another panel that needs 6BPC quirk.

BugLink: https://bugs.launchpad.net/bugs/1819968
Cc: <stable@vger.kernel.org> # v4.8+
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190402033037.21877-1-kai.heng.feng@canonical.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 128bb1e79cf528f3efa723bd924aff033bd52811..5de4895e7ef69ca24bc96718c6e96686916aeada 100644 (file)
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -166,6 +166,9 @@ static const struct edid_quirk {
        /* Medion MD 30217 PG */
        { "MED", 0x7b8, EDID_QUIRK_PREFER_LARGE_75 },
 
+       /* Lenovo G50 */
+       { "SDC", 18514, EDID_QUIRK_FORCE_6BPC },
+
        /* Panel in Samsung NP700G7A-S01PL notebook reports 6bpc */
        { "SEC", 0xd033, EDID_QUIRK_FORCE_8BPC },