OAM does not work with media C6 enabled on some steppings of MTL.
Disable OAM if we detect that media C6 was enabled in bios.
Signed-off-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_perf.c | 30 ++++++++++++++++++++++++++++++
1 file changed, 30 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_perf.c b/drivers/gpu/drm/i915/i915_perf.c
index 77fae3d80128..4ac6535a0356 100644
--- a/drivers/gpu/drm/i915/i915_perf.c
+++ b/drivers/gpu/drm/i915/i915_perf.c
@@ -209,6 +209,7 @@
#include "gt/intel_gt_regs.h"
#include "gt/intel_lrc.h"
#include "gt/intel_lrc_reg.h"
+#include "gt/intel_rc6.h"
#include "gt/intel_ring.h"
#include "gt/uc/intel_guc_slpc.h"
@@ -4898,6 +4899,18 @@ static u32 num_perf_groups_per_gt(struct intel_gt *gt)
static u32 __oam_engine_group(struct intel_engine_cs *engine)
{
+ /*
+ * Wa_14017512683: mtl[a0..c0): Use of OAM must be preceded with Media
+ * C6 disable in BIOS. Do not enable OA for media classes if MC6 is
+ * enabled in BIOS.
+ */
+ if (IS_MTL_MEDIA_STEP(engine->i915, STEP_A0, STEP_C0) &&
+ intel_check_bios_c6_setup(&engine->gt->rc6)) {
+ drm_notice_once(&engine->i915->drm,
+ "OAM requires media C6 to be disabled in BIOS\n");
+ return PERF_GROUP_INVALID;
+ }
+
if (GRAPHICS_VER_FULL(engine->i915) >= IP_VER(12, 70)) {
/*
* There's 1 SAMEDIA gt and 1 OAM per SAMEDIA gt. All media slices
@@ -5317,6 +5330,23 @@ int i915_perf_ioctl_version(struct drm_i915_private *i915)
*
* 7: Add support for video decode and enhancement classes.
*/
+
+ /*
+ * Wa_14017512683: mtl[a0..c0): Use of OAM must be preceded with Media
+ * C6 disable in BIOS. Do not enable OA for media classes if MC6 is
+ * enabled in BIOS.
+ */
+ if (IS_MTL_MEDIA_STEP(i915, STEP_A0, STEP_C0)) {
+ struct intel_gt *gt;
+ int i;
+
+ for_each_gt(gt, i915, i) {
+ if (gt->type == GT_MEDIA &&
+ intel_check_bios_c6_setup(>->rc6))
+ return 6;
+ }
+ }
+
return 7;
}
--
2.36.1
