drm/edid: Add 6 bpc quirk for display AEO model 0.

[firefly-linux-kernel-4.4.55.git] / drivers / gpu / drm / drm_edid.c

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index d5d2c03fd1369b904e31af5184c05e4b9da0f82d..8c9ac021608f3aee7280ff5816de1441716bff4f 100644 (file)
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -73,6 +73,8 @@
 #define EDID_QUIRK_FORCE_8BPC                  (1 << 8)
 /* Force 12bpc */
 #define EDID_QUIRK_FORCE_12BPC                 (1 << 9)
+/* Force 6bpc */
+#define EDID_QUIRK_FORCE_6BPC                  (1 << 10)
 
 struct detailed_mode_closure {
        struct drm_connector *connector;
@@ -99,6 +101,9 @@ static struct edid_quirk {
        /* Unknown Acer */
        { "ACR", 2423, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
 
+       /* AEO model 0 reports 8 bpc, but is a 6 bpc panel */
+       { "AEO", 0, EDID_QUIRK_FORCE_6BPC },
+
        /* Belinea 10 15 55 */
        { "MAX", 1516, EDID_QUIRK_PREFER_LARGE_60 },
        { "MAX", 0x77e, EDID_QUIRK_PREFER_LARGE_60 },
@@ -3820,6 +3825,9 @@ int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid)
 
        drm_add_display_info(edid, &connector->display_info, connector);
 
+       if (quirks & EDID_QUIRK_FORCE_6BPC)
+               connector->display_info.bpc = 6;
+
        if (quirks & EDID_QUIRK_FORCE_8BPC)
                connector->display_info.bpc = 8;