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drm/i915/skl: Stage the pipe DDB allocation 

To correctly flush the new DDB allocation we need to know about the pipe
allocation layout inside the DDB in order to sequence the re-allocation
to not cause a newly allocated pipe to fetch from a space that was
previously allocated to another pipe.

This patch preserves the per-pipe (start,end) allocation to be used in
the flush.

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Damien Lespiau 2014-11-04 17:07:01 +00:00 committed by Daniel Vetter
parent 5d374d9638
commit 34bb56af7f
2 changed files with 8 additions and 7 deletions
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1
drivers/gpu/drm/i915/i915_drv.h
View File

@ -1406,6 +1406,7 @@ static inline bool skl_ddb_entry_equal(const struct skl_ddb_entry *e1,
}
struct skl_ddb_allocation {
struct skl_ddb_entry pipe[I915_MAX_PIPES];
struct skl_ddb_entry plane[I915_MAX_PIPES][I915_MAX_PLANES];
struct skl_ddb_entry cursor[I915_MAX_PIPES];
};

14
drivers/gpu/drm/i915/intel_pm.c
View File

@ -3119,13 +3119,13 @@ skl_allocate_pipe_ddb(struct drm_crtc *crtc,
struct drm_device *dev = crtc->dev;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
enum pipe pipe = intel_crtc->pipe;
struct skl_ddb_entry alloc;
struct skl_ddb_entry *alloc = &ddb->pipe[pipe];
uint16_t alloc_size, start, cursor_blocks;
unsigned int total_data_rate;
int plane;
skl_ddb_get_pipe_allocation_limits(dev, crtc, config, params, &alloc);
alloc_size = skl_ddb_entry_size(&alloc);
skl_ddb_get_pipe_allocation_limits(dev, crtc, config, params, alloc);
alloc_size = skl_ddb_entry_size(alloc);
if (alloc_size == 0) {
memset(ddb->plane[pipe], 0, sizeof(ddb->plane[pipe]));
memset(&ddb->cursor[pipe], 0, sizeof(ddb->cursor[pipe]));
@ -3133,11 +3133,11 @@ skl_allocate_pipe_ddb(struct drm_crtc *crtc,
}
cursor_blocks = skl_cursor_allocation(config);
ddb->cursor[pipe].start = alloc.end - cursor_blocks;
ddb->cursor[pipe].end = alloc.end;
ddb->cursor[pipe].start = alloc->end - cursor_blocks;
ddb->cursor[pipe].end = alloc->end;
alloc_size -= cursor_blocks;
alloc.end -= cursor_blocks;
alloc->end -= cursor_blocks;
/*
* Each active plane get a portion of the remaining space, in
@ -3147,7 +3147,7 @@ skl_allocate_pipe_ddb(struct drm_crtc *crtc,
*/
total_data_rate = skl_get_total_relative_data_rate(intel_crtc, params);
start = alloc.start;
start = alloc->start;
for (plane = 0; plane < intel_num_planes(intel_crtc); plane++) {
const struct intel_plane_wm_parameters *p;
unsigned int data_rate;