This will eventually allow us to re-use old values without
re-calculating them for unchanged planes (which also helps us avoid
re-grabbing extra plane states).
Signed-off-by: Matt Roper <matthew.d.roper@xxxxxxxxx>
---
drivers/gpu/drm/i915/intel_drv.h | 4 ++++
drivers/gpu/drm/i915/intel_pm.c | 6 ++++--
2 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index e67438f..56f4cf8 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -430,6 +430,10 @@ struct intel_crtc_wm_state {
/* cached plane data rate */
unsigned plane_data_rate[I915_MAX_PLANES];
unsigned plane_y_data_rate[I915_MAX_PLANES];
+
+ /* minimum block allocation */
+ uint16_t minimum_blocks[I915_MAX_PLANES];
+ uint16_t minimum_y_blocks[I915_MAX_PLANES];
} skl;
};
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 39ab1cb..479a890 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3067,8 +3067,8 @@ skl_allocate_pipe_ddb(struct intel_crtc_state *cstate,
enum pipe pipe = intel_crtc->pipe;
struct skl_ddb_entry *alloc = &ddb->pipe[pipe];
uint16_t alloc_size, start, cursor_blocks;
- uint16_t minimum[I915_MAX_PLANES];
- uint16_t y_minimum[I915_MAX_PLANES];
+ uint16_t *minimum = cstate->wm.skl.minimum_blocks;
+ uint16_t *y_minimum = cstate->wm.skl.minimum_y_blocks;
unsigned int total_data_rate;
skl_ddb_get_pipe_allocation_limits(dev, cstate, config, alloc);
@@ -3088,6 +3088,8 @@ skl_allocate_pipe_ddb(struct intel_crtc_state *cstate,
alloc->end -= cursor_blocks;
/* 1. Allocate the mininum required blocks for each active plane */
+ memset(minimum, 0, sizeof(uint16_t) * I915_MAX_PLANES);
+ memset(y_minimum, 0, sizeof(uint16_t) * I915_MAX_PLANES);
for_each_intel_plane_on_crtc(dev, intel_crtc, intel_plane) {
struct drm_plane *plane = &intel_plane->base;
struct drm_framebuffer *fb = plane->state->fb;
--
2.1.4
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