diff options
| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2013-06-26 18:43:24 +0400 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2013-07-02 17:40:23 +0400 |
| commit | e8474409d7ab6dac38d4a3a6a365504b302f6c16 (patch) | |
| tree | 69a670adc45ceed249b06d3c1b50a27d776b2952 /drivers/gpu/drm/i915/i915_reg.h | |
| parent | 510d5f2f6b97eccbfa08234e21b0577c1748807d (diff) | |
| download | linux-e8474409d7ab6dac38d4a3a6a365504b302f6c16.tar.xz | |
drm/i915: Use wait_for() to wait for Punit to change GPU freq on VLV
Use wait_for() instead of the open coded loop to avoid spreading the
same old timeout related bugs.
This changes the loop to use msleep(1) instead of udelay(10) when the
Punit had not yet completed the frequency change. In practice that
doesn't seem to hurt performance as the Punit appears to be ready pretty
much always.
Also give the status bit a name, instead of using the magic number 1.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_reg.h')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_reg.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index f2326fc60ac9..9b51be800961 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -363,6 +363,7 @@ #define PUNIT_REG_GPU_LFM 0xd3 #define PUNIT_REG_GPU_FREQ_REQ 0xd4 #define PUNIT_REG_GPU_FREQ_STS 0xd8 +#define GENFREQSTATUS (1<<0) #define PUNIT_REG_MEDIA_TURBO_FREQ_REQ 0xdc #define PUNIT_FUSE_BUS2 0xf6 /* bits 47:40 */ |