drm/i915/tgl: Read SAGV block time from PCODE (da80f047) · Commits · 戴 / test

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

drivers/gpu/drm/i915/i915_reg.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -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

drivers/gpu/drm/i915/intel_pm.c

+14 −1

Original line number	Diff line number	Diff line
		@@ -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)) {

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