drm/radeon: re-enable sw ACR support on pre-DCE4

HW ACR support may have issues on some older chips, so use SW ACR for now until we've tested further. Signed-off-by: Alex Deucher <alexander.deucher@amd.com> CC: Rafał Miłecki <zajec5@gmail.com>

drm/radeon: re-enable sw ACR support on pre-DCE4
HW ACR support may have issues on some older chips, so use SW ACR for now until we've tested further. Signed-off-by: Alex Deucher <alexander.deucher@amd.com> CC: Rafał Miłecki <zajec5@gmail.com>
Alex Deucher
1 parent 4076a65544
Showing 1 changed file with 1 additions and 0 deletions Side-by-side Diff
drivers/gpu/drm/radeon/r600_hdmi.c
@@ -451,6 +451,7 @@
 	}
  
 	WREG32(HDMI0_ACR_PACKET_CONTROL + offset,
+	       HDMI0_ACR_SOURCE | /* select SW CTS value - XXX verify that hw CTS works on all families */
 	       HDMI0_ACR_AUTO_SEND); /* allow hw to sent ACR packets when required */
  
 	WREG32(HDMI0_VBI_PACKET_CONTROL + offset,
...	...	@@ -451,6 +451,7 @@
451	451	}
452	452
453	453	WREG32(HDMI0_ACR_PACKET_CONTROL + offset,
	454	+ HDMI0_ACR_SOURCE \| /* select SW CTS value - XXX verify that hw CTS works on all families */
454	455	HDMI0_ACR_AUTO_SEND); /* allow hw to sent ACR packets when required */
455	456
456	457	WREG32(HDMI0_VBI_PACKET_CONTROL + offset,