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| author | Jani Nikula <jani.nikula@intel.com> | 2013-05-28 12:35:02 +0300 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2013-05-31 20:54:04 +0200 |
| commit | 6b1c087ba5789aceb25a2170b217055ce2476f67 (patch) | |
| tree | 6391b3a9a6f02b5433841e78a2ac15230ceefcce /drivers/gpu/drm | |
| parent | eccb140bca6727f2ef849e8811d5fe4c9fbfd5dd (diff) | |
| download | blackbird-op-linux-6b1c087ba5789aceb25a2170b217055ce2476f67.tar.gz blackbird-op-linux-6b1c087ba5789aceb25a2170b217055ce2476f67.zip | |
drm/i915: document why dvo/sdvo/crt need a special dpms function
In the cloned case, changing just one output but keeping the other, the
pipe state won't change and intel_crtc_update_dpms will be a nop, but we
still need to update the dpms state of the output being changed.
Only dvo, sdvo and crt are cloneable, so only those three have special
dpms functions.
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_crt.c | 4 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_dvo.c | 3 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_sdvo.c | 3 |
3 files changed, 9 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/intel_crt.c b/drivers/gpu/drm/i915/intel_crt.c index 5e9f93e53255..3acec8c48166 100644 --- a/drivers/gpu/drm/i915/intel_crt.c +++ b/drivers/gpu/drm/i915/intel_crt.c @@ -149,7 +149,7 @@ static void intel_enable_crt(struct intel_encoder *encoder) intel_crt_set_dpms(encoder, crt->connector->base.dpms); } - +/* Special dpms function to support cloning between dvo/sdvo/crt. */ static void intel_crt_dpms(struct drm_connector *connector, int mode) { struct drm_device *dev = connector->dev; @@ -180,6 +180,8 @@ static void intel_crt_dpms(struct drm_connector *connector, int mode) else encoder->connectors_active = true; + /* We call connector dpms manually below in case pipe dpms doesn't + * change due to cloning. */ if (mode < old_dpms) { /* From off to on, enable the pipe first. */ intel_crtc_update_dpms(crtc); diff --git a/drivers/gpu/drm/i915/intel_dvo.c b/drivers/gpu/drm/i915/intel_dvo.c index 9e80d487b5cb..eb2020eb2b7e 100644 --- a/drivers/gpu/drm/i915/intel_dvo.c +++ b/drivers/gpu/drm/i915/intel_dvo.c @@ -180,6 +180,7 @@ static void intel_enable_dvo(struct intel_encoder *encoder) intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, true); } +/* Special dpms function to support cloning between dvo/sdvo/crt. */ static void intel_dvo_dpms(struct drm_connector *connector, int mode) { struct intel_dvo *intel_dvo = intel_attached_dvo(connector); @@ -201,6 +202,8 @@ static void intel_dvo_dpms(struct drm_connector *connector, int mode) return; } + /* We call connector dpms manually below in case pipe dpms doesn't + * change due to cloning. */ if (mode == DRM_MODE_DPMS_ON) { intel_dvo->base.connectors_active = true; diff --git a/drivers/gpu/drm/i915/intel_sdvo.c b/drivers/gpu/drm/i915/intel_sdvo.c index 4d4a3f0cadfb..7068195376ef 100644 --- a/drivers/gpu/drm/i915/intel_sdvo.c +++ b/drivers/gpu/drm/i915/intel_sdvo.c @@ -1416,6 +1416,7 @@ static void intel_enable_sdvo(struct intel_encoder *encoder) intel_sdvo_set_active_outputs(intel_sdvo, intel_sdvo->attached_output); } +/* Special dpms function to support cloning between dvo/sdvo/crt. */ static void intel_sdvo_dpms(struct drm_connector *connector, int mode) { struct drm_crtc *crtc; @@ -1437,6 +1438,8 @@ static void intel_sdvo_dpms(struct drm_connector *connector, int mode) return; } + /* We set active outputs manually below in case pipe dpms doesn't change + * due to cloning. */ if (mode != DRM_MODE_DPMS_ON) { intel_sdvo_set_active_outputs(intel_sdvo, 0); if (0) |
