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| author | Jesse Barnes <jbarnes@virtuousgeek.org> | 2013-03-08 10:45:57 -0800 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2013-03-23 12:17:58 +0100 |
| commit | ed5de3995f9cdff997613f240e41033463703121 (patch) | |
| tree | 5b2e6e2fd858df9426f1d50af24c6794f0cf514e /drivers/gpu | |
| parent | da6ecc5decf6243a93dd0ecae4a4a773bf21dcce (diff) | |
| download | blackbird-op-linux-ed5de3995f9cdff997613f240e41033463703121.tar.gz blackbird-op-linux-ed5de3995f9cdff997613f240e41033463703121.zip | |
drm/i915: add media well to VLV force wake routines v2
We could split this out into a separate routine at some point as an
optimization.
v2: use FORCEWAKE_KERNEL (Ville)
Note: Ville mentioned in his review that he declines to be responsible
if this blows up due to the lack of "readback a register != FW_ACK,
but from the same cacheline" magic we have in other forcewake
implementations.
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
[danvet: Bikeshed overtly long lines according to checkpatch.pl. Nope,
this time around I didn't screw up printk message since I've left
those alone.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_reg.h | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_pm.c | 14 |
2 files changed, 13 insertions, 3 deletions
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 176cf5c58507..17cb78f5760a 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -4148,6 +4148,8 @@ #define FORCEWAKE 0xA18C #define FORCEWAKE_VLV 0x1300b0 #define FORCEWAKE_ACK_VLV 0x1300b4 +#define FORCEWAKE_MEDIA_VLV 0x1300b8 +#define FORCEWAKE_ACK_MEDIA_VLV 0x1300bc #define FORCEWAKE_ACK_HSW 0x130044 #define FORCEWAKE_ACK 0x130090 #define VLV_GTLC_WAKE_CTRL 0x130090 diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index c30e89a45236..52d4f2d660db 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -4404,10 +4404,17 @@ static void vlv_force_wake_get(struct drm_i915_private *dev_priv) DRM_ERROR("Timed out waiting for forcewake old ack to clear.\n"); I915_WRITE_NOTRACE(FORCEWAKE_VLV, _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL)); + I915_WRITE_NOTRACE(FORCEWAKE_MEDIA_VLV, + _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL)); if (wait_for_atomic((I915_READ_NOTRACE(FORCEWAKE_ACK_VLV) & FORCEWAKE_KERNEL), FORCEWAKE_ACK_TIMEOUT_MS)) - DRM_ERROR("Timed out waiting for forcewake to ack request.\n"); + DRM_ERROR("Timed out waiting for GT to ack forcewake request.\n"); + + if (wait_for_atomic((I915_READ_NOTRACE(FORCEWAKE_ACK_MEDIA_VLV) & + FORCEWAKE_KERNEL), + FORCEWAKE_ACK_TIMEOUT_MS)) + DRM_ERROR("Timed out waiting for media to ack forcewake request.\n"); __gen6_gt_wait_for_thread_c0(dev_priv); } @@ -4415,8 +4422,9 @@ static void vlv_force_wake_get(struct drm_i915_private *dev_priv) static void vlv_force_wake_put(struct drm_i915_private *dev_priv) { I915_WRITE_NOTRACE(FORCEWAKE_VLV, _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL)); - /* something from same cacheline, but !FORCEWAKE_VLV */ - POSTING_READ(FORCEWAKE_ACK_VLV); + I915_WRITE_NOTRACE(FORCEWAKE_MEDIA_VLV, + _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL)); + /* The below doubles as a POSTING_READ */ gen6_gt_check_fifodbg(dev_priv); } |
