For MTL, when reading from HW, RP0, RP1 (actuall RPe) and RPn freq use an
entirely different set of registers with different fields, bitwidths and
units.
v2: Move MTL check into a separate function (Jani)
Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>
Cc: Badal Nilawar <badal.nilawar@xxxxxxxxx>
Signed-off-by: Ashutosh Dixit <ashutosh.dixit@xxxxxxxxx>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
---
drivers/gpu/drm/i915/gt/intel_rps.c | 46 +++++++++++++++++++++++------
drivers/gpu/drm/i915/i915_reg.h | 9 ++++++
2 files changed, 46 insertions(+), 9 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_rps.c b/drivers/gpu/drm/i915/gt/intel_rps.c
index 6b86250c31ab..17b40b625e31 100644
--- a/drivers/gpu/drm/i915/gt/intel_rps.c
+++ b/drivers/gpu/drm/i915/gt/intel_rps.c
@@ -1085,15 +1085,25 @@ static u32 intel_rps_read_state_cap(struct intel_rps *rps)
return intel_uncore_read(uncore, GEN6_RP_STATE_CAP);
}
-/**
- * gen6_rps_get_freq_caps - Get freq caps exposed by HW
- * @rps: the intel_rps structure
- * @caps: returned freq caps
- *
- * Returned "caps" frequencies should be converted to MHz using
- * intel_gpu_freq()
- */
-void gen6_rps_get_freq_caps(struct intel_rps *rps, struct intel_rps_freq_caps *caps)
+static void
+mtl_get_freq_caps(struct intel_rps *rps, struct intel_rps_freq_caps *caps)
+{
+ struct intel_uncore *uncore = rps_to_uncore(rps);
+ u32 rp_state_cap = rps_to_gt(rps)->type == GT_MEDIA ?
+ intel_uncore_read(uncore, MTL_MEDIAP_STATE_CAP) :
+ intel_uncore_read(uncore, MTL_RP_STATE_CAP);
+ u32 rpe = rps_to_gt(rps)->type == GT_MEDIA ?
+ intel_uncore_read(uncore, MTL_MPE_FREQUENCY) :
+ intel_uncore_read(uncore, MTL_GT_RPE_FREQUENCY);
+
+ /* MTL values are in units of 16.67 MHz */
+ caps->rp0_freq = REG_FIELD_GET(MTL_RP0_CAP_MASK, rp_state_cap);
+ caps->min_freq = REG_FIELD_GET(MTL_RPN_CAP_MASK, rp_state_cap);
+ caps->rp1_freq = REG_FIELD_GET(MTL_RPE_MASK, rpe);
+}
+
+static void
+__gen6_rps_get_freq_caps(struct intel_rps *rps, struct intel_rps_freq_caps *caps)
{
struct drm_i915_private *i915 = rps_to_i915(rps);
u32 rp_state_cap;
@@ -1128,6 +1138,24 @@ void gen6_rps_get_freq_caps(struct intel_rps *rps, struct intel_rps_freq_caps *c
}
}
+/**
+ * gen6_rps_get_freq_caps - Get freq caps exposed by HW
+ * @rps: the intel_rps structure
+ * @caps: returned freq caps
+ *
+ * Returned "caps" frequencies should be converted to MHz using
+ * intel_gpu_freq()
+ */
+void gen6_rps_get_freq_caps(struct intel_rps *rps, struct intel_rps_freq_caps *caps)
+{
+ struct drm_i915_private *i915 = rps_to_i915(rps);
+
+ if (IS_METEORLAKE(i915))
+ return mtl_get_freq_caps(rps, caps);
+ else
+ return __gen6_rps_get_freq_caps(rps, caps);
+}
+
static void gen6_rps_init(struct intel_rps *rps)
{
struct drm_i915_private *i915 = rps_to_i915(rps);
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 38e895ad4b59..2101b6d6dae5 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -1792,6 +1792,15 @@
#define XEHPSDV_RP_STATE_CAP _MMIO(0x250014)
#define PVC_RP_STATE_CAP _MMIO(0x281014)
+#define MTL_RP_STATE_CAP _MMIO(0x138000)
+#define MTL_MEDIAP_STATE_CAP _MMIO(0x138020)
+#define MTL_RP0_CAP_MASK REG_GENMASK(8, 0)
+#define MTL_RPN_CAP_MASK REG_GENMASK(24, 16)
+
+#define MTL_GT_RPE_FREQUENCY _MMIO(0x13800c)
+#define MTL_MPE_FREQUENCY _MMIO(0x13802c)
+#define MTL_RPE_MASK REG_GENMASK(8, 0)
+
#define GT0_PERF_LIMIT_REASONS _MMIO(0x1381a8)
#define GT0_PERF_LIMIT_REASONS_MASK 0xde3
#define PROCHOT_MASK REG_BIT(0)
--
2.34.1
