openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

drm/i915: vlv: factor out vlv_force_gfx_clock and check for pending force-off 

This will be needed by the VLV runtime PM helpers too, so factor it out.

Also add a safety check for the case where the previous force-off is
still pending, since I'm not sure if Punit can handle a new setting
while the previous one hasn't settled yet.

v2:
- unchanged
v3:
- add a note to the commit message about the safety check (Ville)

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Imre Deak 2014-04-18 16:35:02 +03:00 committed by Daniel Vetter
parent 4e80519e31
commit 650ad970a3
3 changed files with 40 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

37
drivers/gpu/drm/i915/i915_drv.c
View File

@ -933,6 +933,43 @@ static void hsw_runtime_resume(struct drm_i915_private *dev_priv)
hsw_disable_pc8(dev_priv);
}
int vlv_force_gfx_clock(struct drm_i915_private *dev_priv, bool force_on)
{
u32 val;
int err;
val = I915_READ(VLV_GTLC_SURVIVABILITY_REG);
WARN_ON(!!(val & VLV_GFX_CLK_FORCE_ON_BIT) == force_on);
#define COND (I915_READ(VLV_GTLC_SURVIVABILITY_REG) & VLV_GFX_CLK_STATUS_BIT)
/* Wait for a previous force-off to settle */
if (force_on) {
err = wait_for(!COND, 5);
if (err) {
DRM_ERROR("timeout waiting for GFX clock force-off (%08x)\n",
I915_READ(VLV_GTLC_SURVIVABILITY_REG));
return err;
}
}
val = I915_READ(VLV_GTLC_SURVIVABILITY_REG);
val &= ~VLV_GFX_CLK_FORCE_ON_BIT;
if (force_on)
val |= VLV_GFX_CLK_FORCE_ON_BIT;
I915_WRITE(VLV_GTLC_SURVIVABILITY_REG, val);
if (!force_on)
return 0;
err = wait_for(COND, 5);
if (err)
DRM_ERROR("timeout waiting for GFX clock force-on (%08x)\n",
I915_READ(VLV_GTLC_SURVIVABILITY_REG));
return err;
#undef COND
}
static int intel_runtime_suspend(struct device *device)
{
struct pci_dev *pdev = to_pci_dev(device);

1
drivers/gpu/drm/i915/i915_drv.h
View File

@ -1973,6 +1973,7 @@ extern unsigned long i915_chipset_val(struct drm_i915_private *dev_priv);
extern unsigned long i915_mch_val(struct drm_i915_private *dev_priv);
extern unsigned long i915_gfx_val(struct drm_i915_private *dev_priv);
extern void i915_update_gfx_val(struct drm_i915_private *dev_priv);
int vlv_force_gfx_clock(struct drm_i915_private *dev_priv, bool on);
extern void intel_console_resume(struct work_struct *work);

16
drivers/gpu/drm/i915/intel_pm.c
View File

@ -3129,16 +3129,7 @@ static void vlv_set_rps_idle(struct drm_i915_private *dev_priv)
/* Mask turbo interrupt so that they will not come in between */
I915_WRITE(GEN6_PMINTRMSK, 0xffffffff);
/* Bring up the Gfx clock */
I915_WRITE(VLV_GTLC_SURVIVABILITY_REG,
I915_READ(VLV_GTLC_SURVIVABILITY_REG) |
VLV_GFX_CLK_FORCE_ON_BIT);
if (wait_for(((VLV_GFX_CLK_STATUS_BIT &
I915_READ(VLV_GTLC_SURVIVABILITY_REG)) != 0), 5)) {
DRM_ERROR("GFX_CLK_ON request timed out\n");
return;
}
vlv_force_gfx_clock(dev_priv, true);
dev_priv->rps.cur_freq = dev_priv->rps.min_freq_softlimit;
@ -3149,10 +3140,7 @@ static void vlv_set_rps_idle(struct drm_i915_private *dev_priv)
& GENFREQSTATUS) == 0, 5))
DRM_ERROR("timed out waiting for Punit\n");
/* Release the Gfx clock */
I915_WRITE(VLV_GTLC_SURVIVABILITY_REG,
I915_READ(VLV_GTLC_SURVIVABILITY_REG) &
~VLV_GFX_CLK_FORCE_ON_BIT);
vlv_force_gfx_clock(dev_priv, false);
I915_WRITE(GEN6_PMINTRMSK,
gen6_rps_pm_mask(dev_priv, dev_priv->rps.cur_freq));