Starting from TGL, we now need to read the SAGV block time via a PCODE
mailbox, rather than having a static value.
BSpec: 49326
Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxx>
Cc: Stanislav Lisovskiy <stanislav.lisovskiy@xxxxxxxxx>
Cc: Lucas De Marchi <lucas.demarchi@xxxxxxxxx>
Signed-off-by: James Ausmus <james.ausmus@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_reg.h | 1 +
drivers/gpu/drm/i915/intel_pm.c | 20 +++++++++++++++-----
2 files changed, 16 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index e752de9470bd..84ae6553485b 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -8865,6 +8865,7 @@ enum {
#define GEN9_SAGV_DISABLE 0x0
#define GEN9_SAGV_IS_DISABLED 0x1
#define GEN9_SAGV_ENABLE 0x3
+#define GEN12_PCODE_READ_SAGV_BLOCK_TIME_US 0x23
#define GEN6_PCODE_DATA _MMIO(0x138128)
#define GEN6_PCODE_FREQ_IA_RATIO_SHIFT 8
#define GEN6_PCODE_FREQ_RING_RATIO_SHIFT 16
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 5ad72dcb0faa..ca2bec09edb5 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3665,16 +3665,26 @@ intel_has_sagv(struct drm_i915_private *dev_priv)
static int
intel_get_sagv_block_time_us(struct drm_i915_private *dev_priv)
{
- int sagv_block_time_us = 1000; /* Default to unusable block time */
+ uint val = 0;
+ int ret, sagv_block_time_us = 1000; /* Default to unusable block time */
- if (IS_GEN(dev_priv, 11))
+ if (INTEL_GEN(dev_priv) >= 12) {
+ ret = sandybridge_pcode_read(dev_priv,
+ GEN12_PCODE_READ_SAGV_BLOCK_TIME_US,
+ &val, NULL);
+ if (!ret)
+ sagv_block_time_us = val;
+ else
+ DRM_DEBUG_DRIVER("Couldn't read SAGV block time!\n");
+ } else if (IS_GEN(dev_priv, 11)) {
sagv_block_time_us = 10;
- else if (IS_GEN(dev_priv, 10))
+ } else if (IS_GEN(dev_priv, 10)) {
sagv_block_time_us = 20;
- else if (IS_GEN(dev_priv, 9))
+ } else if (IS_GEN(dev_priv, 9)) {
sagv_block_time_us = 30;
- else
+ } else {
MISSING_CASE(INTEL_GEN(dev_priv));
+ }
return sagv_block_time_us;
}
--
2.22.1
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