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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2010-08-19 19:09:23 +0400 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2010-09-08 13:13:32 +0400 |
| commit | 44834a67c0082e2cf74b16be91e49108b1432d65 (patch) | |
| tree | ebe2c53b1a08b99a95b579942ae2d7603935709d /drivers/gpu/drm/i915/i915_debugfs.c | |
| parent | 3b61796785e7b0ca8846b7a709216dceb6e2f68d (diff) | |
| download | linux-44834a67c0082e2cf74b16be91e49108b1432d65.tar.xz | |
drm/i915: Use the VBT from OpRegion when available (v3)
It is recommended that we use the Video BIOS tables that were copied
into the OpRegion during POST when initialising the driver. This saves
us from having to furtle around inside the ROM ourselves and possibly
allows the vBIOS to adjust the tables prior to initialisation.
On some systems, such as the Samsung N210, there is no accessible VBIOS
and the only means of finding the VBT is through the OpRegion.
v2: Rearrange the code so that ASLE is enabled along with ACPI
v3: Enable OpRegion parsing even without ACPI
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Matthew Garrett <mjg@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_debugfs.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_debugfs.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index 5e43d7076789..16133f10ffaa 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -718,6 +718,26 @@ static int i915_gfxec(struct seq_file *m, void *unused) return 0; } +static int i915_opregion(struct seq_file *m, void *unused) +{ + struct drm_info_node *node = (struct drm_info_node *) m->private; + struct drm_device *dev = node->minor->dev; + drm_i915_private_t *dev_priv = dev->dev_private; + struct intel_opregion *opregion = &dev_priv->opregion; + int ret; + + ret = mutex_lock_interruptible(&dev->struct_mutex); + if (ret) + return ret; + + if (opregion->header) + seq_write(m, opregion->header, OPREGION_SIZE); + + mutex_unlock(&dev->struct_mutex); + + return 0; +} + static int i915_wedged_open(struct inode *inode, struct file *filp) @@ -845,6 +865,7 @@ static struct drm_info_list i915_debugfs_list[] = { {"i915_gfxec", i915_gfxec, 0}, {"i915_fbc_status", i915_fbc_status, 0}, {"i915_sr_status", i915_sr_status, 0}, + {"i915_opregion", i915_opregion, 0}, }; #define I915_DEBUGFS_ENTRIES ARRAY_SIZE(i915_debugfs_list) |