diff options
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_pm.c | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index f68d12cb0246..9e44ba2c09b6 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -2522,6 +2522,7 @@ skl_allocate_pipe_ddb(struct drm_crtc *crtc, 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]; unsigned int total_data_rate; int plane; @@ -2540,9 +2541,21 @@ skl_allocate_pipe_ddb(struct drm_crtc *crtc, alloc_size -= cursor_blocks; alloc->end -= cursor_blocks; + /* 1. Allocate the mininum required blocks for each active plane */ + for_each_plane(pipe, plane) { + const struct intel_plane_wm_parameters *p; + + p = ¶ms->plane[plane]; + if (!p->enabled) + continue; + + minimum[plane] = 8; + alloc_size -= minimum[plane]; + } + /* - * Each active plane get a portion of the remaining space, in - * proportion to the amount of data they need to fetch from memory. + * 2. Distribute the remaining space in proportion to the amount of + * data each plane needs to fetch from memory. * * FIXME: we may not allocate every single block here. */ @@ -2564,8 +2577,9 @@ skl_allocate_pipe_ddb(struct drm_crtc *crtc, * promote the expression to 64 bits to avoid overflowing, the * result is < available as data_rate / total_data_rate < 1 */ - plane_blocks = div_u64((uint64_t)alloc_size * data_rate, - total_data_rate); + plane_blocks = minimum[plane]; + plane_blocks += div_u64((uint64_t)alloc_size * data_rate, + total_data_rate); ddb->plane[pipe][plane].start = start; ddb->plane[pipe][plane].end = start + plane_blocks; |