Display workaround #1139 for Geminilake instructs us to restrict HDMI to 8 bpc when htotal is greater than 5460. Otherwise, the pipe is unable to generate a proper signal and is left in a state where corruption is seen with other modes.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=100440 Cc: Shashank Sharma <shashank.sha...@intel.com> Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.olive...@intel.com> --- drivers/gpu/drm/i915/intel_hdmi.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c index 6efc3cb..52f0b2d 100644 --- a/drivers/gpu/drm/i915/intel_hdmi.c +++ b/drivers/gpu/drm/i915/intel_hdmi.c @@ -1327,6 +1327,11 @@ static bool hdmi_12bpc_possible(struct intel_crtc_state *crtc_state) return false; } + /* Display Wa #1139 */ + if (IS_GLK_REVID(dev_priv, 0, GLK_REVID_A1) && + crtc_state->base.adjusted_mode.htotal > 5460) + return false; + return true; } -- 2.9.3 _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx
