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authorRodrigo Vivi <rodrigo.vivi@gmail.com>2014-09-16 19:18:12 -0400
committerDaniel Vetter <daniel.vetter@ffwll.ch>2014-09-30 09:18:37 +0200
commitad9dc91b6e21266bfc6f466db4b95e10211f31ee (patch)
tree43c97a6a4f8710ea3f1a4c6dd5ad760dbfb7a76e /include/drm/drm_dp_helper.h
parent6805b2a7434daaede07969ed5877300b2a0783e7 (diff)
drm/i915: Fix Sink CRC
In some cases like when PSR just got enabled the panel need more vblank times to calculate CRC. I figured that out with the new PSR test cases facing some cases that I had a green screen but a blank CRC. Even with 2 vblank waits on kernel + 2 vblank waits on test case. So let's give up to 6 vblank wait time. However we now check for TEST_CRC_COUNT that shows when panel finished to calculate CRC and has it ready. v2: Jani pointed out attempts decrements was wrong and should never reach the error condition. And Daniel pointed out that EIO is more appropriated than EGAIN. Also I realized that I have to read test_crc_count after setting test_sink v3: Rebase and adding error message Cc: Todd Previte <tprevite@gmail.com> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com> Reviewed-by: Todd Previte <tprevite@gmail.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'include/drm/drm_dp_helper.h')
-rw-r--r--include/drm/drm_dp_helper.h5
1 files changed, 3 insertions, 2 deletions
diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
index 9305c718d789..8edeed00c082 100644
--- a/include/drm/drm_dp_helper.h
+++ b/include/drm/drm_dp_helper.h
@@ -303,7 +303,8 @@
#define DP_TEST_CRC_B_CB 0x244
#define DP_TEST_SINK_MISC 0x246
-#define DP_TEST_CRC_SUPPORTED (1 << 5)
+# define DP_TEST_CRC_SUPPORTED (1 << 5)
+# define DP_TEST_COUNT_MASK 0x7
#define DP_TEST_RESPONSE 0x260
# define DP_TEST_ACK (1 << 0)
@@ -313,7 +314,7 @@
#define DP_TEST_EDID_CHECKSUM 0x261
#define DP_TEST_SINK 0x270
-#define DP_TEST_SINK_START (1 << 0)
+# define DP_TEST_SINK_START (1 << 0)
#define DP_PAYLOAD_TABLE_UPDATE_STATUS 0x2c0 /* 1.2 MST */
# define DP_PAYLOAD_TABLE_UPDATED (1 << 0)

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