Current GuC firmwares identify response message in a different way.
v2: update comments for other H2G bits (Daniele)
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@xxxxxxxxx>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@xxxxxxxxx>
Cc: Kelvin Gardiner <kelvin.gardiner@xxxxxxxxx>
Cc: John Spotswood <john.a.spotswood@xxxxxxxxx>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@xxxxxxxxx>
---
drivers/gpu/drm/i915/intel_guc_ct.c | 2 +-
drivers/gpu/drm/i915/intel_guc_fwif.h | 8 +++++---
2 files changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_guc_ct.c b/drivers/gpu/drm/i915/intel_guc_ct.c
index dde1dc0d6e69..2d5dc2aa22a7 100644
--- a/drivers/gpu/drm/i915/intel_guc_ct.c
+++ b/drivers/gpu/drm/i915/intel_guc_ct.c
@@ -565,7 +565,7 @@ static inline unsigned int ct_header_get_action(u32 header)
static inline bool ct_header_is_response(u32 header)
{
- return ct_header_get_action(header) == INTEL_GUC_ACTION_DEFAULT;
+ return !!(header & GUC_CT_MSG_IS_RESPONSE);
}
static int ctb_read(struct intel_guc_ct_buffer *ctb, u32 *data)
diff --git a/drivers/gpu/drm/i915/intel_guc_fwif.h b/drivers/gpu/drm/i915/intel_guc_fwif.h
index fa745a58d38d..3d1de288d96c 100644
--- a/drivers/gpu/drm/i915/intel_guc_fwif.h
+++ b/drivers/gpu/drm/i915/intel_guc_fwif.h
@@ -355,14 +355,16 @@ struct guc_ct_buffer_desc {
*
* bit[4..0] message len (in dwords)
* bit[7..5] reserved
- * bit[8] write fence to desc
- * bit[9] write status to H2G buff
- * bit[10] send status (via G2H)
+ * bit[8] response (G2H only)
+ * bit[8] write fence to desc (H2G only)
+ * bit[9] write status to H2G buff (H2G only)
+ * bit[10] send status back via G2H (H2G only)
* bit[15..11] reserved
* bit[31..16] action code
*/
#define GUC_CT_MSG_LEN_SHIFT 0
#define GUC_CT_MSG_LEN_MASK 0x1F
+#define GUC_CT_MSG_IS_RESPONSE (1 << 8)
#define GUC_CT_MSG_WRITE_FENCE_TO_DESC (1 << 8)
#define GUC_CT_MSG_WRITE_STATUS_TO_BUFF (1 << 9)
#define GUC_CT_MSG_SEND_STATUS (1 << 10)
--
2.19.2
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