| Message ID | 20180218085359.7817-1-kai.heng.feng@canonical.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Sun, 18 Feb 2018, Kai-Heng Feng <kai.heng.feng@canonical.com> wrote: > Similar to commit e10aec652f31 ("drm/edid: Add 6 bpc quirk for display > AEO model 0."), the EDID reports "DFP 1.x compliant TMDS" but it support > 6bpc instead of 8 bpc. > > Hence, use 6 bpc quirk for this panel. > > Fixes: 196f954e2509 ("drm/i915/dp: Revert "drm/i915/dp: fall back to 18 bpp when sink capability is unknown"") Implies Cc: <stable@vger.kernel.org> # v4.8+ > BugLink: https://bugs.launchpad.net/bugs/1749420 > Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com> > --- > drivers/gpu/drm/drm_edid.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c > index ddd537914575..d9c8d718e261 100644 > --- a/drivers/gpu/drm/drm_edid.c > +++ b/drivers/gpu/drm/drm_edid.c > @@ -113,6 +113,9 @@ static const struct edid_quirk { > /* AEO model 0 reports 8 bpc, but is a 6 bpc panel */ > { "AEO", 0, EDID_QUIRK_FORCE_6BPC }, > > + /* CPT panel of Asus UX303LA reports 8 bpc, but is a 6 bpc panel */ > + { "CPT", 0x17df, EDID_QUIRK_FORCE_6BPC }, > + > /* Belinea 10 15 55 */ > { "MAX", 1516, EDID_QUIRK_PREFER_LARGE_60 }, > { "MAX", 0x77e, EDID_QUIRK_PREFER_LARGE_60 },
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index ddd537914575..d9c8d718e261 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -113,6 +113,9 @@ static const struct edid_quirk { /* AEO model 0 reports 8 bpc, but is a 6 bpc panel */ { "AEO", 0, EDID_QUIRK_FORCE_6BPC }, + /* CPT panel of Asus UX303LA reports 8 bpc, but is a 6 bpc panel */ + { "CPT", 0x17df, EDID_QUIRK_FORCE_6BPC }, + /* Belinea 10 15 55 */ { "MAX", 1516, EDID_QUIRK_PREFER_LARGE_60 }, { "MAX", 0x77e, EDID_QUIRK_PREFER_LARGE_60 },
Similar to commit e10aec652f31 ("drm/edid: Add 6 bpc quirk for display AEO model 0."), the EDID reports "DFP 1.x compliant TMDS" but it support 6bpc instead of 8 bpc. Hence, use 6 bpc quirk for this panel. Fixes: 196f954e2509 ("drm/i915/dp: Revert "drm/i915/dp: fall back to 18 bpp when sink capability is unknown"") BugLink: https://bugs.launchpad.net/bugs/1749420 Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com> --- drivers/gpu/drm/drm_edid.c | 3 +++ 1 file changed, 3 insertions(+)