From: Badal Nilawar <badal.nilawar@xxxxxxxxx>
Update CAGF functions for MTL to get actual resolved frequency of 3D and
SAMedia.
v2: Update MTL_MIRROR_TARGET_WP1 position/formatting (MattR)
Move MTL branches in cagf functions to top (MattR)
Fix commit message (Andi)
v3: Added comment about registers not needing forcewake for Gen12+ and
returning 0 freq in RC6
v4: Use REG_FIELD_GET and uncore (Rodrigo)
Bspec: 66300
Signed-off-by: Ashutosh Dixit <ashutosh.dixit@xxxxxxxxx>
Signed-off-by: Badal Nilawar <badal.nilawar@xxxxxxxxx>
---
drivers/gpu/drm/i915/gt/intel_gt_regs.h | 4 ++++
drivers/gpu/drm/i915/gt/intel_rps.c | 12 ++++++++++--
2 files changed, 14 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_gt_regs.h b/drivers/gpu/drm/i915/gt/intel_gt_regs.h
index f8c4f758ac0b1..d8dbd0ac3b064 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt_regs.h
+++ b/drivers/gpu/drm/i915/gt/intel_gt_regs.h
@@ -21,6 +21,10 @@
*/
#define PERF_REG(offset) _MMIO(offset)
+/* MTL workpoint reg to get core C state and actual freq of 3D, SAMedia */
+#define MTL_MIRROR_TARGET_WP1 _MMIO(0xc60)
+#define MTL_CAGF_MASK REG_GENMASK(8, 0)
+
/* RPM unit config (Gen8+) */
#define RPM_CONFIG0 _MMIO(0xd00)
#define GEN9_RPM_CONFIG0_CRYSTAL_CLOCK_FREQ_SHIFT 3
diff --git a/drivers/gpu/drm/i915/gt/intel_rps.c b/drivers/gpu/drm/i915/gt/intel_rps.c
index da6b969f554b6..63cc7c538401e 100644
--- a/drivers/gpu/drm/i915/gt/intel_rps.c
+++ b/drivers/gpu/drm/i915/gt/intel_rps.c
@@ -2093,7 +2093,9 @@ u32 intel_rps_get_cagf(struct intel_rps *rps, u32 rpstat)
struct drm_i915_private *i915 = rps_to_i915(rps);
u32 cagf;
- if (GRAPHICS_VER(i915) >= 12)
+ if (GRAPHICS_VER_FULL(i915) >= IP_VER(12, 70))
+ cagf = REG_FIELD_GET(MTL_CAGF_MASK, rpstat);
+ else if (GRAPHICS_VER(i915) >= 12)
cagf = REG_FIELD_GET(GEN12_CAGF_MASK, rpstat);
else if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915))
cagf = REG_FIELD_GET(RPE_MASK, rpstat);
@@ -2115,7 +2117,13 @@ static u32 read_cagf(struct intel_rps *rps)
struct intel_uncore *uncore = rps_to_uncore(rps);
u32 freq;
- if (GRAPHICS_VER(i915) >= 12) {
+ /*
+ * For Gen12+ reading freq from HW does not need a forcewake and
+ * registers will return 0 freq when GT is in RC6
+ */
+ if (GRAPHICS_VER_FULL(i915) >= IP_VER(12, 70)) {
+ freq = intel_uncore_read(uncore, MTL_MIRROR_TARGET_WP1);
+ } else if (GRAPHICS_VER(i915) >= 12) {
freq = intel_uncore_read(uncore, GEN12_RPSTAT1);
} else if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915)) {
vlv_punit_get(i915);
--
2.38.0
