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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2013-10-13 15:56:31 +0400 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2013-10-14 12:02:36 +0400 |
| commit | 540b5d02766863c561afe9f9d56ce0425022a731 (patch) | |
| tree | 5793a09cf473595f4f759b8d63b1bbff46aa0ba5 | |
| parent | 391f75e2bf13f105d9e4a120736ccdd8e3bc638b (diff) | |
| download | linux-540b5d02766863c561afe9f9d56ce0425022a731.tar.xz | |
drm/i915: Add breadcrumbs for why the backlight is being set
At the moment we have 3 paths that lead to actually_set_backlight(),
from modesetting, ACPI/OpRegion requests and our very own
intel_backlight interface, and we have no way of distinguishing them in
the debug log. So add a debug breadcrumb to explain the source of the
backlight changes.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
| -rw-r--r-- | drivers/gpu/drm/i915/intel_opregion.c | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_panel.c | 4 |
2 files changed, 5 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_opregion.c b/drivers/gpu/drm/i915/intel_opregion.c index 904464023c8f..b82050c96f3e 100644 --- a/drivers/gpu/drm/i915/intel_opregion.c +++ b/drivers/gpu/drm/i915/intel_opregion.c @@ -407,6 +407,7 @@ static u32 asle_set_backlight(struct drm_device *dev, u32 bclp) if (bclp > 255) return ASLC_BACKLIGHT_FAILED; + DRM_DEBUG_KMS("updating opregion backlight %d/255\n", bclp); intel_panel_set_backlight(dev, bclp, 255); iowrite32(DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID, &asle->cblv); diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c index 54684168de1e..1f2996031ad9 100644 --- a/drivers/gpu/drm/i915/intel_panel.c +++ b/drivers/gpu/drm/i915/intel_panel.c @@ -574,6 +574,8 @@ void intel_panel_enable_backlight(struct drm_device *dev, intel_pipe_to_cpu_transcoder(dev_priv, pipe); unsigned long flags; + DRM_DEBUG_KMS("pipe=%d\n", pipe); + spin_lock_irqsave(&dev_priv->backlight.lock, flags); if (dev_priv->backlight.level == 0) { @@ -680,6 +682,8 @@ intel_panel_detect(struct drm_device *dev) static int intel_panel_update_status(struct backlight_device *bd) { struct drm_device *dev = bl_get_data(bd); + DRM_DEBUG_KMS("updating intel_backlight, brightness=%d/%d\n", + bd->props.brightness, bd->props.max_brightness); intel_panel_set_backlight(dev, bd->props.brightness, bd->props.max_brightness); return 0; |