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drm/i915: Track whether an atomic transaction changes the active CRTC's 

For the purposes of DDB re-allocation we need to know whether a
transaction changes the list of CRTC's that are active.  While
state->modeset could be used for this purpose, that would be slightly
too aggressive since it would lead us to re-allocate the DDB when a
CRTC's mode changes, but not its final active state.

Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1463061971-19638-7-git-send-email-matthew.d.roper@intel.com
This commit is contained in:
Matt Roper 2016-05-12 07:06:00 -07:00
parent 86a2100a8b
commit 8b4a7d0597
2 changed files with 13 additions and 0 deletions
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3
drivers/gpu/drm/i915/intel_display.c
View File

@ -13270,6 +13270,9 @@ static int intel_modeset_checks(struct drm_atomic_state *state)
intel_state->active_crtcs |= 1 << i;
else
intel_state->active_crtcs &= ~(1 << i);
if (crtc_state->active != crtc->state->active)
intel_state->active_pipe_changes |= drm_crtc_mask(crtc);
}
/*

10
drivers/gpu/drm/i915/intel_drv.h
View File

@ -291,6 +291,16 @@ struct intel_atomic_state {
bool dpll_set, modeset;
/*
* Does this transaction change the pipes that are active? This mask
* tracks which CRTC's have changed their active state at the end of
* the transaction (not counting the temporary disable during modesets).
* This mask should only be non-zero when intel_state->modeset is true,
* but the converse is not necessarily true; simply changing a mode may
* not flip the final active status of any CRTC's
*/
unsigned int active_pipe_changes;
unsigned int active_crtcs;
unsigned int min_pixclk[I915_MAX_PIPES];