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drm/i915/mst: Force modeset on MST slaves when master needs a modeset

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MST master can not be disabled while it have attached MST slaves, so
it is necessary force a modeset in all of its slaves.

v3:
- moved handling to intel_atomic_check() this way is guarantee that
all pipes will have its state computed

v4:
- added a function to return if MST master neeeds modeset to simply
code in intel_atomic_check()

v5:
- fixed and moved code to check if MST master needs a modeset

v6:
- previons version of this patch was split into two patches

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191223010654.67037-6-jose.souza@intel.com
This commit is contained in:
José Roberto de Souza 2019-12-22 17:06:53 -08:00
parent 5cb5b370c1
commit 080d47bfae
1 changed files with 36 additions and 0 deletions
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36
drivers/gpu/drm/i915/display/intel_display.c
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@ -14290,6 +14290,20 @@ static int intel_atomic_check_crtcs(struct intel_atomic_state *state)
return 0;
}
static bool intel_cpu_transcoder_needs_modeset(struct intel_atomic_state *state,
enum transcoder transcoder)
{
struct intel_crtc_state *new_crtc_state;
struct intel_crtc *crtc;
int i;
for_each_new_intel_crtc_in_state(state, crtc, new_crtc_state, i)
if (new_crtc_state->cpu_transcoder == transcoder)
return needs_modeset(new_crtc_state);
return false;
}
/**
* intel_atomic_check - validate state object
* @dev: drm device
@ -14342,6 +14356,28 @@ static int intel_atomic_check(struct drm_device *dev,
intel_crtc_check_fastset(old_crtc_state, new_crtc_state);
}
/**
* Check if fastset is allowed by external dependencies like other
* pipes and transcoders.
*
* Right now it only forces a fullmodeset when the MST master
* transcoder did not changed but the pipe of the master transcoder
* needs a fullmodeset so all slaves also needs to do a fullmodeset.
*/
for_each_new_intel_crtc_in_state(state, crtc, new_crtc_state, i) {
enum transcoder master = new_crtc_state->mst_master_transcoder;
if (!new_crtc_state->hw.enable ||
needs_modeset(new_crtc_state) ||
!intel_dp_mst_is_slave_trans(new_crtc_state))
continue;
if (intel_cpu_transcoder_needs_modeset(state, master)) {
new_crtc_state->uapi.mode_changed = true;
new_crtc_state->update_pipe = false;
}
}
for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state,
new_crtc_state, i) {
if (needs_modeset(new_crtc_state)) {