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drm/i915/tgl: Read SAGV block time from PCODE 

Starting from TGL, we now need to read the SAGV block time via a PCODE
mailbox, rather than having a static value.

BSpec: 49326

v2: Fix up pcode val data type (Ville), tighten variable scope (Ville)

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: James Ausmus <james.ausmus@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191004221449.1317-2-james.ausmus@intel.com
Link: https://patchwork.freedesktop.org/patch/msgid/20191009172315.11004-2-lucas.demarchi@intel.com
This commit is contained in:
James Ausmus 2019-10-09 10:23:15 -07:00 committed by Lucas De Marchi
parent b068a86071
commit da80f04792
2 changed files with 15 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/gpu/drm/i915/i915_reg.h
View File

@ -8878,6 +8878,7 @@ 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

15
drivers/gpu/drm/i915/intel_pm.c
View File

@ -3641,7 +3641,20 @@ intel_has_sagv(struct drm_i915_private *dev_priv)
static void
skl_setup_sagv_block_time(struct drm_i915_private *dev_priv)
{
if (IS_GEN(dev_priv, 11)) {
if (INTEL_GEN(dev_priv) >= 12) {
u32 val = 0;
int ret;
ret = sandybridge_pcode_read(dev_priv,
GEN12_PCODE_READ_SAGV_BLOCK_TIME_US,
&val, NULL);
if (!ret) {
dev_priv->sagv_block_time_us = val;
return;
}
DRM_DEBUG_DRIVER("Couldn't read SAGV block time!\n");
} else if (IS_GEN(dev_priv, 11)) {
dev_priv->sagv_block_time_us = 10;
return;
} else if (IS_GEN(dev_priv, 10)) {