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From 21b8f4f57b5f37796b4aa6d24ad8b326fe68902b Mon Sep 17 00:00:00 2001
From: Matt Roper <matthew.d.roper@intel.com>
Date: Thu, 12 May 2016 07:06:00 -0700
Subject: [PATCH 06/17] 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
---
drivers/gpu/drm/i915/intel_display.c | 3 +++
drivers/gpu/drm/i915/intel_drv.h | 10 ++++++++++
2 files changed, 13 insertions(+)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 4633aec..f26d1c5 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -13300,6 +13300,9 @@ 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);
}
/*
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 9308cff..d19e83e 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -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];
--
2.7.4
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