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drm/i915/skl+: Clean up minimum allocations, v2.

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Move calculating minimum allocations to a helper, which cleans up the
code some more. The cursor is still allocated in advance because it
doesn't count towards data rate and should always be reserved.

changes since v1:
- Change comment to have a extra opening line. (Matt)
- Rebase to remove unused plane->pipe == pipe, handled by the iterator
  now. (Paulo)

Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1477489299-25777-7-git-send-email-maarten.lankhorst@linux.intel.com
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
This commit is contained in:
Maarten Lankhorst 2016-10-26 15:41:34 +02:00
parent fefdd8104d
commit 49845a7aff
1 changed files with 38 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

62
drivers/gpu/drm/i915/intel_pm.c
View File

@ -3364,6 +3364,30 @@ skl_ddb_min_alloc(const struct drm_plane_state *pstate,
return DIV_ROUND_UP((4 * src_w * plane_bpp), 512) * min_scanlines/4 + 3;
}
static void
skl_ddb_calc_min(const struct intel_crtc_state *cstate, int num_active,
uint16_t *minimum, uint16_t *y_minimum)
{
const struct drm_plane_state *pstate;
struct drm_plane *plane;
drm_atomic_crtc_state_for_each_plane_state(plane, pstate, &cstate->base) {
struct intel_plane *intel_plane = to_intel_plane(plane);
int id = skl_wm_plane_id(intel_plane);
if (id == PLANE_CURSOR)
continue;
if (!pstate->visible)
continue;
minimum[id] = skl_ddb_min_alloc(pstate, 0);
y_minimum[id] = skl_ddb_min_alloc(pstate, 1);
}
minimum[PLANE_CURSOR] = skl_cursor_allocation(num_active);
}
static int
skl_allocate_pipe_ddb(struct intel_crtc_state *cstate,
struct skl_ddb_allocation *ddb /* out */)
@ -3372,12 +3396,9 @@ skl_allocate_pipe_ddb(struct intel_crtc_state *cstate,
struct drm_crtc *crtc = cstate->base.crtc;
struct drm_device *dev = crtc->dev;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
struct intel_plane *intel_plane;
struct drm_plane *plane;
const struct drm_plane_state *pstate;
enum pipe pipe = intel_crtc->pipe;
struct skl_ddb_entry *alloc = &cstate->wm.skl.ddb;
uint16_t alloc_size, start, cursor_blocks;
uint16_t alloc_size, start;
uint16_t minimum[I915_MAX_PLANES] = {};
uint16_t y_minimum[I915_MAX_PLANES] = {};
unsigned int total_data_rate;
@ -3405,32 +3426,22 @@ skl_allocate_pipe_ddb(struct intel_crtc_state *cstate,
return 0;
}
cursor_blocks = skl_cursor_allocation(num_active);
ddb->plane[pipe][PLANE_CURSOR].start = alloc->end - cursor_blocks;
ddb->plane[pipe][PLANE_CURSOR].end = alloc->end;
skl_ddb_calc_min(cstate, num_active, minimum, y_minimum);
alloc_size -= cursor_blocks;
/*
* 1. Allocate the mininum required blocks for each active plane
* and allocate the cursor, it doesn't require extra allocation
* proportional to the data rate.
*/
/* 1. Allocate the mininum required blocks for each active plane */
drm_atomic_crtc_state_for_each_plane_state(plane, pstate, &cstate->base) {
intel_plane = to_intel_plane(plane);
id = skl_wm_plane_id(intel_plane);
if (!pstate->visible)
continue;
if (plane->type == DRM_PLANE_TYPE_CURSOR)
continue;
minimum[id] = skl_ddb_min_alloc(pstate, 0);
y_minimum[id] = skl_ddb_min_alloc(pstate, 1);
}
for (i = 0; i < PLANE_CURSOR; i++) {
for (i = 0; i < I915_MAX_PLANES; i++) {
alloc_size -= minimum[i];
alloc_size -= y_minimum[i];
}
ddb->plane[pipe][PLANE_CURSOR].start = alloc->end - minimum[PLANE_CURSOR];
ddb->plane[pipe][PLANE_CURSOR].end = alloc->end;
/*
* 2. Distribute the remaining space in proportion to the amount of
* data each plane needs to fetch from memory.
@ -3448,6 +3459,9 @@ skl_allocate_pipe_ddb(struct intel_crtc_state *cstate,
unsigned int data_rate, y_data_rate;
uint16_t plane_blocks, y_plane_blocks = 0;
if (id == PLANE_CURSOR)
continue;
data_rate = plane_data_rate[id];
/*