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drm/i915/tgl: Enable VD HCP/MFX sub-pipe power gating

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HCP/MFX power gating is disabled by default, turn it on for the vd units
available. User space will also issue a MI_FORCE_WAKEUP properly to
wake up proper subwell.

During driver load, init_clock_gating happens after device_info_init_mmio
read the vdbox disable fuse register, so only present vd units will have
these enabled.

BSpec: 14214
HSDES: 1209977827
Signed-off-by: Michel Thierry <michel.thierry@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Tony Ye <tony.ye@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190823082055.5992-3-lucas.demarchi@intel.com
This commit is contained in:
Michel Thierry
2019-08-23 01:20:34 -07:00
committed by Lucas De Marchi
parent b3c0692f36
commit 5d86923060
2 changed files with 21 additions and 1 deletions
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18
drivers/gpu/drm/i915/intel_pm.c
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@@ -9078,6 +9078,22 @@ static void icl_init_clock_gating(struct drm_i915_private *dev_priv)
_MASKED_BIT_ENABLE(GEN11_ENABLE_32_PLANE_MODE));
}
static void tgl_init_clock_gating(struct drm_i915_private *dev_priv)
{
u32 vd_pg_enable = 0;
unsigned int i;
/* This is not a WA. Enable VD HCP & MFX_ENC powergate */
for (i = 0; i < I915_MAX_VCS; i++) {
if (HAS_ENGINE(dev_priv, _VCS(i)))
vd_pg_enable |= VDN_HCP_POWERGATE_ENABLE(i) |
VDN_MFX_POWERGATE_ENABLE(i);
}
I915_WRITE(POWERGATE_ENABLE,
I915_READ(POWERGATE_ENABLE) | vd_pg_enable);
}
static void cnp_init_clock_gating(struct drm_i915_private *dev_priv)
{
if (!HAS_PCH_CNP(dev_priv))
@@ -9598,7 +9614,7 @@ static void nop_init_clock_gating(struct drm_i915_private *dev_priv)
void intel_init_clock_gating_hooks(struct drm_i915_private *dev_priv)
{
if (IS_GEN(dev_priv, 12))
dev_priv->display.init_clock_gating = nop_init_clock_gating;
dev_priv->display.init_clock_gating = tgl_init_clock_gating;
else if (IS_GEN(dev_priv, 11))
dev_priv->display.init_clock_gating = icl_init_clock_gating;
else if (IS_CANNONLAKE(dev_priv))