[Intel-gfx] [RFC 19/22] drm/i915: Fix length handling for MFX_WAIT

[bradley.d.volkin at intel.com]

From: Brad Volkin <bradley.d.volkin at intel.com>

Signed-off-by: Brad Volkin <bradley.d.volkin at intel.com>
---
 drivers/gpu/drm/i915/i915_cmd_parser.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_cmd_parser.c b/drivers/gpu/drm/i915/i915_cmd_parser.c
index 5593740..adc7d94 100644
--- a/drivers/gpu/drm/i915/i915_cmd_parser.c
+++ b/drivers/gpu/drm/i915/i915_cmd_parser.c
@@ -193,7 +193,11 @@ static const struct drm_i915_cmd_descriptor video_cmds[] = {
 			.expected = 0
 	      }},
 	      .bits_count = 1                                          ),
-	CMD(  MFX_WAIT,                         SMFX,  !F,  0x3F,   S  ),
+	/* MFX_WAIT doesn't fit the way we handle length for most commands.
+	 * It has a length field but it uses a non-standard length bias.
+	 * It is always 1 dword though, so just treat it as fixed length.
+	 */
+	CMD(  MFX_WAIT,                         SMFX,   F,  1,      S  ),
 };
 
 static const struct drm_i915_cmd_descriptor vecs_cmds[] = {
-- 
1.8.4.4