From: Ville Syrjälä Date: Thu, 16 Jan 2014 16:27:15 +0000 (+0200) Subject: drm/i915: Eliminate lots of WARNs when there's no backlight present X-Git-Tag: v3.14-rc5~1^2~9^2~21 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=dc5a43636c2fd50c694f16d042e0639fff5044fd;p=profile%2Fivi%2Fkernel-x86-ivi.git drm/i915: Eliminate lots of WARNs when there's no backlight present My 855gm doesn't register the intel backlight but it still ends up calling the backlight code to enable/disable the backlight via the LVDS code. This leads to some WARNs due to backlight.max being 0. Let's have intel_panel_enable_backlight() and intel_panel_disable_backlight() check whether there's a backlight present or not. Also move the backlight.present check from asle_set_backlight() into intel_panel_set_backlight() for some extra symmetry. Signed-off-by: Ville Syrjälä Reviewed-by: Jani Nikula Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/intel_opregion.c b/drivers/gpu/drm/i915/intel_opregion.c index 3da259e..37e9a96 100644 --- a/drivers/gpu/drm/i915/intel_opregion.c +++ b/drivers/gpu/drm/i915/intel_opregion.c @@ -396,9 +396,7 @@ int intel_opregion_notify_adapter(struct drm_device *dev, pci_power_t state) static u32 asle_set_backlight(struct drm_device *dev, u32 bclp) { struct drm_i915_private *dev_priv = dev->dev_private; - struct drm_connector *connector; struct intel_connector *intel_connector; - struct intel_panel *panel; struct opregion_asle __iomem *asle = dev_priv->opregion.asle; DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp); @@ -417,12 +415,8 @@ static u32 asle_set_backlight(struct drm_device *dev, u32 bclp) * only one). */ DRM_DEBUG_KMS("updating opregion backlight %d/255\n", bclp); - list_for_each_entry(connector, &dev->mode_config.connector_list, head) { - intel_connector = to_intel_connector(connector); - panel = &intel_connector->panel; - if (panel->backlight.present) - intel_panel_set_backlight(intel_connector, bclp, 255); - } + list_for_each_entry(intel_connector, &dev->mode_config.connector_list, base.head) + intel_panel_set_backlight(intel_connector, bclp, 255); iowrite32(DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID, &asle->cblv); mutex_unlock(&dev->mode_config.mutex); diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c index 20ebc3e..350de35 100644 --- a/drivers/gpu/drm/i915/intel_panel.c +++ b/drivers/gpu/drm/i915/intel_panel.c @@ -502,7 +502,7 @@ void intel_panel_set_backlight(struct intel_connector *connector, u32 level, u32 freq; unsigned long flags; - if (pipe == INVALID_PIPE) + if (!panel->backlight.present || pipe == INVALID_PIPE) return; spin_lock_irqsave(&dev_priv->backlight_lock, flags); @@ -579,7 +579,7 @@ void intel_panel_disable_backlight(struct intel_connector *connector) enum pipe pipe = intel_get_pipe_from_connector(connector); unsigned long flags; - if (pipe == INVALID_PIPE) + if (!panel->backlight.present || pipe == INVALID_PIPE) return; /* @@ -782,7 +782,7 @@ void intel_panel_enable_backlight(struct intel_connector *connector) enum pipe pipe = intel_get_pipe_from_connector(connector); unsigned long flags; - if (pipe == INVALID_PIPE) + if (!panel->backlight.present || pipe == INVALID_PIPE) return; DRM_DEBUG_KMS("pipe %c\n", pipe_name(pipe));