drm/i915: add DP test request handling

DPCD 1.1+ adds some automated test infrastructure support.  Add support
for reading the IRQ source and jumping to a test handling routine if
needed.  Subsequent patches will handle particular tests; this patch
just ACKs any requested tests by default.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Keith Packard <keithp@keithp.com>

1 files changed, 25 insertions, 0 deletions

diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
index 2b1a3585f8d8..0d2f727e96be 100644
--- a/include/drm/drm_dp_helper.h
+++ b/include/drm/drm_dp_helper.h
@@ -153,6 +153,12 @@
 # define DP_PSR_CRC_VERIFICATION            (1 << 2)
 # define DP_PSR_FRAME_CAPTURE               (1 << 3)
 
+#define DP_DEVICE_SERVICE_IRQ_VECTOR        0x201
+# define DP_REMOTE_CONTROL_COMMAND_PENDING  (1 << 0)
+# define DP_AUTOMATED_TEST_REQUEST          (1 << 1)
+# define DP_CP_IRQ                          (1 << 2)
+# define DP_SINK_SPECIFIC_IRQ               (1 << 6)
+
 #define DP_LANE0_1_STATUS                   0x202
 #define DP_LANE2_3_STATUS                   0x203
 # define DP_LANE_CR_DONE                    (1 << 0)
@@ -185,6 +191,25 @@
 # define DP_ADJUST_PRE_EMPHASIS_LANE1_MASK   0xc0
 # define DP_ADJUST_PRE_EMPHASIS_LANE1_SHIFT  6
 
+#define DP_TEST_REQUEST                     0x218
+# define DP_TEST_LINK_TRAINING              (1 << 0)
+# define DP_TEST_LINK_PATTERN               (1 << 1)
+# define DP_TEST_LINK_EDID_READ             (1 << 2)
+# define DP_TEST_LINK_PHY_TEST_PATTERN      (1 << 3) /* DPCD >= 1.1 */
+
+#define DP_TEST_LINK_RATE                   0x219
+# define DP_LINK_RATE_162                   (0x6)
+# define DP_LINK_RATE_27                    (0xa)
+
+#define DP_TEST_LANE_COUNT                  0x220
+
+#define DP_TEST_PATTERN                     0x221
+
+#define DP_TEST_RESPONSE                    0x260
+# define DP_TEST_ACK                        (1 << 0)
+# define DP_TEST_NAK                        (1 << 1)
+# define DP_TEST_EDID_CHECKSUM_WRITE        (1 << 2)
+
 #define DP_SET_POWER                        0x600
 # define DP_SET_POWER_D0                    0x1
 # define DP_SET_POWER_D3                    0x2