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| author | Paulo Zanoni <paulo.r.zanoni@intel.com> | 2013-02-19 16:13:35 -0300 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2013-02-20 01:33:48 +0100 |
| commit | 02bcca0d72a1491d30cfb5dce29e348ac15fd01c (patch) | |
| tree | 7afbedaf3e353d00f9992923851095b3512f496d /drivers/gpu/drm/i915/i915_dma.c | |
| parent | 3f1e109a8be5670487e00e1c6bc0670526325227 (diff) | |
| download | linux-stable-02bcca0d72a1491d30cfb5dce29e348ac15fd01c.tar.gz linux-stable-02bcca0d72a1491d30cfb5dce29e348ac15fd01c.tar.bz2 linux-stable-02bcca0d72a1491d30cfb5dce29e348ac15fd01c.zip | |
drm/i915: clear the FPGA_DBG_RM_NOCLAIM bit at driver init
Otherwise, if the BIOS did anything wrong, our first I915_{WRITE,READ}
will give us "unclaimed register" messages.
V2: Even earlier.
V3: Move it to intel_early_sanitize_regs.
Bugzilla: http://bugs.freedesktop.org/show_bug.cgi?id=58897
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_dma.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_dma.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c index 4fa6beb14c77..e16099b6f942 100644 --- a/drivers/gpu/drm/i915/i915_dma.c +++ b/drivers/gpu/drm/i915/i915_dma.c @@ -1453,6 +1453,22 @@ static void i915_dump_device_info(struct drm_i915_private *dev_priv) } /** + * intel_early_sanitize_regs - clean up BIOS state + * @dev: DRM device + * + * This function must be called before we do any I915_READ or I915_WRITE. Its + * purpose is to clean up any state left by the BIOS that may affect us when + * reading and/or writing registers. + */ +static void intel_early_sanitize_regs(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + + if (IS_HASWELL(dev)) + I915_WRITE_NOTRACE(FPGA_DBG, FPGA_DBG_RM_NOCLAIM); +} + +/** * i915_driver_load - setup chip and create an initial config * @dev: DRM device * @flags: startup flags @@ -1542,6 +1558,8 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags) goto put_gmch; } + intel_early_sanitize_regs(dev); + aperture_size = dev_priv->gtt.mappable_end; dev_priv->gtt.mappable = |