diff options
| author | Ben Widawsky <benjamin.widawsky@intel.com> | 2013-11-02 21:07:47 -0700 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2013-11-08 18:09:59 +0100 |
| commit | 2a114cc1b964ba0208aa6858d01cee82ac026ec6 (patch) | |
| tree | 36a8d874e57fd4d864d3956735c872b3de3b1b86 /drivers/gpu/drm/i915 | |
| parent | 416f4727abf9e5ecc88fea4b55ea294d310534ac (diff) | |
drm/i915/bdw: Use The GT mailbox for IPS enable/disable
v2: Squash in fixup from Ben to synchronize the GT mailbox commands.
CC: Art Runyan <arthur.j.runyan@intel.com>
Reviewed-by: Art Runyan <arthur.j.runyan@intel.com>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_drv.h | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_reg.h | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 36 |
3 files changed, 28 insertions, 11 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index d9d6db263ab..5deeb19551a 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -1805,7 +1805,7 @@ struct drm_i915_file_private { #define HAS_PIPE_CXSR(dev) (INTEL_INFO(dev)->has_pipe_cxsr) #define I915_HAS_FBC(dev) (INTEL_INFO(dev)->has_fbc) -#define HAS_IPS(dev) (IS_ULT(dev)) +#define HAS_IPS(dev) (IS_ULT(dev) || IS_BROADWELL(dev)) #define HAS_DDI(dev) (INTEL_INFO(dev)->has_ddi) #define HAS_POWER_WELL(dev) (IS_HASWELL(dev) || IS_BROADWELL(dev)) diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index b2abdd78fde..f99c8c5b7bd 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -4953,6 +4953,7 @@ #define GEN6_PCODE_WRITE_D_COMP 0x11 #define GEN6_ENCODE_RC6_VID(mv) (((mv) - 245) / 5) #define GEN6_DECODE_RC6_VID(vids) (((vids) * 5) + 245) +#define DISPLAY_IPS_CONTROL 0x19 #define GEN6_PCODE_DATA 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_display.c b/drivers/gpu/drm/i915/intel_display.c index 1b1e75ed050..e690cfedd6d 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -3393,15 +3393,26 @@ void hsw_enable_ips(struct intel_crtc *crtc) * only after intel_enable_plane. And intel_enable_plane already waits * for a vblank, so all we need to do here is to enable the IPS bit. */ assert_plane_enabled(dev_priv, crtc->plane); - I915_WRITE(IPS_CTL, IPS_ENABLE); - - /* The bit only becomes 1 in the next vblank, so this wait here is - * essentially intel_wait_for_vblank. If we don't have this and don't - * wait for vblanks until the end of crtc_enable, then the HW state - * readout code will complain that the expected IPS_CTL value is not the - * one we read. */ - if (wait_for(I915_READ_NOTRACE(IPS_CTL) & IPS_ENABLE, 50)) - DRM_ERROR("Timed out waiting for IPS enable\n"); + if (IS_BROADWELL(crtc->base.dev)) { + mutex_lock(&dev_priv->rps.hw_lock); + WARN_ON(sandybridge_pcode_write(dev_priv, DISPLAY_IPS_CONTROL, 0xc0000000)); + mutex_unlock(&dev_priv->rps.hw_lock); + /* Quoting Art Runyan: "its not safe to expect any particular + * value in IPS_CTL bit 31 after enabling IPS through the + * mailbox." Therefore we need to defer waiting on the state + * change. + * TODO: need to fix this for state checker + */ + } else { + I915_WRITE(IPS_CTL, IPS_ENABLE); + /* The bit only becomes 1 in the next vblank, so this wait here + * is essentially intel_wait_for_vblank. If we don't have this + * and don't wait for vblanks until the end of crtc_enable, then + * the HW state readout code will complain that the expected + * IPS_CTL value is not the one we read. */ + if (wait_for(I915_READ_NOTRACE(IPS_CTL) & IPS_ENABLE, 50)) + DRM_ERROR("Timed out waiting for IPS enable\n"); + } } void hsw_disable_ips(struct intel_crtc *crtc) @@ -3413,7 +3424,12 @@ void hsw_disable_ips(struct intel_crtc *crtc) return; assert_plane_enabled(dev_priv, crtc->plane); - I915_WRITE(IPS_CTL, 0); + if (IS_BROADWELL(crtc->base.dev)) { + mutex_lock(&dev_priv->rps.hw_lock); + WARN_ON(sandybridge_pcode_write(dev_priv, DISPLAY_IPS_CONTROL, 0)); + mutex_unlock(&dev_priv->rps.hw_lock); + } else + I915_WRITE(IPS_CTL, 0); POSTING_READ(IPS_CTL); /* We need to wait for a vblank before we can disable the plane. */ |