diff options
| author | Jani Nikula <jani.nikula@intel.com> | 2012-08-29 14:08:42 +0300 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2012-09-03 10:09:29 +0200 |
| commit | ff04b35af0e40956764596e3d032f786e5451238 (patch) | |
| tree | 5d8d46ac5c86144bc6e177ad848be48fecd9011a /drivers/gpu/drm/i915/intel_sdvo.c | |
| parent | a2c7f6fd4d8d6dff8a561e7bd76b951808143310 (diff) | |
drm/i915: only enable sdvo hotplug irq if needed
Avoid constant wakeups caused by noisy irq lines when we don't even care
about the irq. This should be particularly useful for i945g/gm where the
hotplug has been disabled:
commit 768b107e4b3be0acf6f58e914afe4f337c00932b
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date: Fri May 4 11:29:56 2012 +0200
drm/i915: disable sdvo hotplug on i945g/gm
v2: While at it, remove the bogus hotplug_active read, and do not mask
hotplug_active[0] before checking whether the irq is needed, per discussion
with Daniel on IRC.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=38442
Tested-by: Dominik Köppl <dominik@devwork.org>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_sdvo.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_sdvo.c | 15 |
1 files changed, 6 insertions, 9 deletions
diff --git a/drivers/gpu/drm/i915/intel_sdvo.c b/drivers/gpu/drm/i915/intel_sdvo.c index 434b1d1d3c8..9a31211a60c 100644 --- a/drivers/gpu/drm/i915/intel_sdvo.c +++ b/drivers/gpu/drm/i915/intel_sdvo.c @@ -2570,7 +2570,6 @@ bool intel_sdvo_init(struct drm_device *dev, uint32_t sdvo_reg, bool is_sdvob) hotplug_mask = intel_sdvo->is_sdvob ? SDVOB_HOTPLUG_INT_STATUS_I915 : SDVOC_HOTPLUG_INT_STATUS_I915; } - dev_priv->hotplug_supported_mask |= hotplug_mask; drm_encoder_helper_add(&intel_encoder->base, &intel_sdvo_helper_funcs); @@ -2578,14 +2577,6 @@ bool intel_sdvo_init(struct drm_device *dev, uint32_t sdvo_reg, bool is_sdvob) if (!intel_sdvo_get_capabilities(intel_sdvo, &intel_sdvo->caps)) goto err; - /* Set up hotplug command - note paranoia about contents of reply. - * We assume that the hardware is in a sane state, and only touch - * the bits we think we understand. - */ - intel_sdvo_get_value(intel_sdvo, SDVO_CMD_GET_ACTIVE_HOT_PLUG, - &intel_sdvo->hotplug_active, 2); - intel_sdvo->hotplug_active[0] &= ~0x3; - if (intel_sdvo_output_setup(intel_sdvo, intel_sdvo->caps.output_flags) != true) { DRM_DEBUG_KMS("SDVO output failed to setup on %s\n", @@ -2593,6 +2584,12 @@ bool intel_sdvo_init(struct drm_device *dev, uint32_t sdvo_reg, bool is_sdvob) goto err; } + /* Only enable the hotplug irq if we need it, to work around noisy + * hotplug lines. + */ + if (intel_sdvo->hotplug_active[0]) + dev_priv->hotplug_supported_mask |= hotplug_mask; + intel_sdvo_select_ddc_bus(dev_priv, intel_sdvo, sdvo_reg); /* Set the input timing to the screen. Assume always input 0. */ |