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From 2bf927b92091d11f778a2a972b996f24a63281be Mon Sep 17 00:00:00 2001
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From: Matt Roper <matthew.d.roper@intel.com>
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Date: Thu, 12 May 2016 07:05:58 -0700
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Subject: [PATCH 04/17] drm/i915/gen9: Allow calculation of data rate for
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in-flight state (v2)
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Our skl_get_total_relative_data_rate() function gets passed a crtc state
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object to calculate the data rate for, but it currently always looks
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up the committed plane states that correspond to that CRTC. Let's
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check whether the CRTC state is an in-flight state (meaning
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cstate->state is non-NULL) and if so, use the corresponding in-flight
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plane states.
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We'll soon be using this function exclusively for in-flight states; at
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that time we'll be able to simplify the function a bit, but for now we
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allow it to be used in either mode.
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v2:
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- Rebase on top of changes to cache plane data rates.
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Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
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Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
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Link: http://patchwork.freedesktop.org/patch/msgid/1463061971-19638-5-git-send-email-matthew.d.roper@intel.com
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---
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drivers/gpu/drm/i915/intel_pm.c | 74 +++++++++++++++++++++++++++++++++--------
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1 file changed, 60 insertions(+), 14 deletions(-)
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diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
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index 6835614..5104ba7 100644
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--- a/drivers/gpu/drm/i915/intel_pm.c
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+++ b/drivers/gpu/drm/i915/intel_pm.c
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@@ -2975,25 +2975,69 @@ skl_plane_relative_data_rate(const struct intel_crtc_state *cstate,
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* 3 * 4096 * 8192 * 4 < 2^32
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*/
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static unsigned int
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-skl_get_total_relative_data_rate(struct intel_crtc_state *cstate)
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+skl_get_total_relative_data_rate(struct intel_crtc_state *intel_cstate)
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{
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- struct intel_crtc *intel_crtc = to_intel_crtc(cstate->base.crtc);
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- struct drm_device *dev = intel_crtc->base.dev;
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+ struct drm_crtc_state *cstate = &intel_cstate->base;
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+ struct drm_atomic_state *state = cstate->state;
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+ struct drm_crtc *crtc = cstate->crtc;
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+ struct drm_device *dev = crtc->dev;
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+ struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
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const struct intel_plane *intel_plane;
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unsigned int rate, total_data_rate = 0;
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+ int id;
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/* Calculate and cache data rate for each plane */
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- for_each_intel_plane_on_crtc(dev, intel_crtc, intel_plane) {
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- const struct drm_plane_state *pstate = intel_plane->base.state;
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- int id = skl_wm_plane_id(intel_plane);
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+ /*
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+ * FIXME: At the moment this function can be called on either an
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+ * in-flight or a committed state object. If it's in-flight then we
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+ * only want to re-calculate the plane data rate for planes that are
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+ * part of the transaction (i.e., we don't want to grab any additional
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+ * plane states if we don't have to). If we're operating on committed
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+ * state, we'll just go ahead and recalculate the plane data rate for
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+ * all planes.
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+ *
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+ * Once we finish moving our DDB allocation to the atomic check phase,
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+ * we'll only be calling this function on in-flight state objects, so
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+ * the 'else' branch here will go away.
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+ */
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+ if (state) {
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+ struct drm_plane *plane;
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+ struct drm_plane_state *pstate;
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+ int i;
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+
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+ for_each_plane_in_state(state, plane, pstate, i) {
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+ intel_plane = to_intel_plane(plane);
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+ id = skl_wm_plane_id(intel_plane);
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+
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+ if (intel_plane->pipe != intel_crtc->pipe)
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+ continue;
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+
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+ /* packed/uv */
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+ rate = skl_plane_relative_data_rate(intel_cstate,
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+ pstate, 0);
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+ intel_cstate->wm.skl.plane_data_rate[id] = rate;
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+
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+ /* y-plane */
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+ rate = skl_plane_relative_data_rate(intel_cstate,
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+ pstate, 1);
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+ intel_cstate->wm.skl.plane_y_data_rate[id] = rate;
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+ }
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+ } else {
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+ for_each_intel_plane_on_crtc(dev, intel_crtc, intel_plane) {
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+ const struct drm_plane_state *pstate =
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+ intel_plane->base.state;
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+ int id = skl_wm_plane_id(intel_plane);
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- /* packed/uv */
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- rate = skl_plane_relative_data_rate(cstate, pstate, 0);
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- cstate->wm.skl.plane_data_rate[id] = rate;
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+ /* packed/uv */
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+ rate = skl_plane_relative_data_rate(intel_cstate,
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+ pstate, 0);
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+ intel_cstate->wm.skl.plane_data_rate[id] = rate;
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- /* y-plane */
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- rate = skl_plane_relative_data_rate(cstate, pstate, 1);
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- cstate->wm.skl.plane_y_data_rate[id] = rate;
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+ /* y-plane */
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+ rate = skl_plane_relative_data_rate(intel_cstate,
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+ pstate, 1);
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+ intel_cstate->wm.skl.plane_y_data_rate[id] = rate;
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+ }
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}
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/* Calculate CRTC's total data rate from cached values */
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@@ -3001,10 +3045,12 @@ skl_get_total_relative_data_rate(struct intel_crtc_state *cstate)
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int id = skl_wm_plane_id(intel_plane);
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/* packed/uv */
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- total_data_rate += cstate->wm.skl.plane_data_rate[id];
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- total_data_rate += cstate->wm.skl.plane_y_data_rate[id];
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+ total_data_rate += intel_cstate->wm.skl.plane_data_rate[id];
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+ total_data_rate += intel_cstate->wm.skl.plane_y_data_rate[id];
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}
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+ WARN_ON(cstate->plane_mask && total_data_rate == 0);
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+
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return total_data_rate;
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}
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--
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2.7.4
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