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drm/i915: Clean up VLV/CHV maxfifo watermark setup 

Let's compute the maxfifo watermarks using max() instead of min().
Can't even recall why I did it the other way originally. Anyways
using max() avoids having to initialize the watermarks to the max
value first.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1480354637-14209-5-git-send-email-ville.syrjala@linux.intel.com
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
This commit is contained in:
Ville Syrjälä 2016-11-28 19:37:06 +02:00
parent 1be4d3793d
commit 50a9dd3f24
1 changed files with 2 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/gpu/drm/i915/intel_pm.c
View File

@ -1100,7 +1100,6 @@ static void vlv_compute_wm(struct intel_crtc *crtc)
struct drm_i915_private *dev_priv = to_i915(dev);
struct vlv_wm_state *wm_state = &crtc->wm_state;
struct intel_plane *plane;
int sr_fifo_size = INTEL_INFO(dev_priv)->num_pipes * 512 - 1;
int level;
memset(wm_state, 0, sizeof(*wm_state));
@ -1115,13 +1114,6 @@ static void vlv_compute_wm(struct intel_crtc *crtc)
if (wm_state->num_active_planes != 1)
wm_state->cxsr = false;
if (wm_state->cxsr) {
for (level = 0; level < wm_state->num_levels; level++) {
wm_state->sr[level].plane = sr_fifo_size;
wm_state->sr[level].cursor = 63;
}
}
for_each_intel_plane_on_crtc(dev, crtc, plane) {
struct intel_plane_state *state =
to_intel_plane_state(plane->base.state);
@ -1172,14 +1164,14 @@ static void vlv_compute_wm(struct intel_crtc *crtc)
case DRM_PLANE_TYPE_PRIMARY:
for (level = 0; level < wm_state->num_levels; level++)
wm_state->sr[level].plane =
min(wm_state->sr[level].plane,
max(wm_state->sr[level].plane,
wm_state->wm[level].primary);
break;
case DRM_PLANE_TYPE_OVERLAY:
sprite = vlv_sprite_id(plane->id);
for (level = 0; level < wm_state->num_levels; level++)
wm_state->sr[level].plane =
min(wm_state->sr[level].plane,
max(wm_state->sr[level].plane,
wm_state->wm[level].sprite[sprite]);
break;
}