From: Vinay Belgaumkar <vinay.belgaumkar@xxxxxxxxx>
By defaut idle messaging is disabled for GSC CS so to unblock RC6
entry on media tile idle messaging need to be enabled.
v2:
- Fix review comments (Vinay)
- Set GSC idle hysteresis as per spec (Badal)
v3:
- Fix review comments (Rodrigo)
Bspec: 71496
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@xxxxxxxxx>
Signed-off-by: Vinay Belgaumkar <vinay.belgaumkar@xxxxxxxxx>
Signed-off-by: Badal Nilawar <badal.nilawar@xxxxxxxxx>
Reviewed-by: Vinay Belgaumkar <vinay.belgaumkar@xxxxxxxxx>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
---
drivers/gpu/drm/i915/gt/intel_engine_pm.c | 18 ++++++++++++++++++
drivers/gpu/drm/i915/gt/intel_gt_regs.h | 4 ++++
2 files changed, 22 insertions(+)
diff --git a/drivers/gpu/drm/i915/gt/intel_engine_pm.c b/drivers/gpu/drm/i915/gt/intel_engine_pm.c
index b0a4a2dbe3ee..e971b153fda9 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine_pm.c
+++ b/drivers/gpu/drm/i915/gt/intel_engine_pm.c
@@ -15,6 +15,22 @@
#include "intel_rc6.h"
#include "intel_ring.h"
#include "shmem_utils.h"
+#include "intel_gt_regs.h"
+
+static void intel_gsc_idle_msg_enable(struct intel_engine_cs *engine)
+{
+ struct drm_i915_private *i915 = engine->i915;
+
+ if (IS_METEORLAKE(i915) && engine->id == GSC0) {
+ intel_uncore_write(engine->gt->uncore,
+ RC_PSMI_CTRL_GSCCS,
+ _MASKED_BIT_DISABLE(IDLE_MSG_DISABLE));
+ /* hysteresis 0xA=5us as recommended in spec*/
+ intel_uncore_write(engine->gt->uncore,
+ PWRCTX_MAXCNT_GSCCS,
+ 0xA);
+ }
+}
static void dbg_poison_ce(struct intel_context *ce)
{
@@ -275,6 +291,8 @@ void intel_engine_init__pm(struct intel_engine_cs *engine)
intel_wakeref_init(&engine->wakeref, rpm, &wf_ops);
intel_engine_init_heartbeat(engine);
+
+ intel_gsc_idle_msg_enable(engine);
}
/**
diff --git a/drivers/gpu/drm/i915/gt/intel_gt_regs.h b/drivers/gpu/drm/i915/gt/intel_gt_regs.h
index c3cd92691795..80a979e6f6be 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt_regs.h
+++ b/drivers/gpu/drm/i915/gt/intel_gt_regs.h
@@ -917,6 +917,10 @@
#define MSG_IDLE_FW_MASK REG_GENMASK(13, 9)
#define MSG_IDLE_FW_SHIFT 9
+#define RC_PSMI_CTRL_GSCCS _MMIO(0x11a050)
+#define IDLE_MSG_DISABLE REG_BIT(0)
+#define PWRCTX_MAXCNT_GSCCS _MMIO(0x11a054)
+
#define FORCEWAKE_MEDIA_GEN9 _MMIO(0xa270)
#define FORCEWAKE_RENDER_GEN9 _MMIO(0xa278)
--
2.25.1
