drm/i915: Compute proper intermediate wms for vlv/cvh

Since the watermark registers arent double buffered on VLV/CHV, we'll
need to play around with intermediate watermarks same was as we do on
ILK-BDW.

The watermark registers on VLV/CHV contain inverted values, so to find
the intermediate watermark value we just take the minimum of the
active and optimal values. This also means that, unlike ILK-BDW,
there's no chance that we'd fail to find a working intermediate
watermarks. As long as both the active and optimal watermarks are valid
the intermediate watermarks will come out valid as well.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170302171508.1666-10-ville.syrjala@linux.intel.com
This commit is contained in:
Ville Syrjälä 2017-03-02 19:14:59 +02:00
Родитель 236c48e692
Коммит 4841da51a7
2 изменённых файлов: 60 добавлений и 1 удалений

Просмотреть файл

@ -538,6 +538,8 @@ struct intel_crtc_wm_state {
struct {
/* "raw" watermarks (not inverted) */
struct vlv_pipe_wm raw[NUM_VLV_WM_LEVELS];
/* intermediate watermarks (inverted) */
struct vlv_wm_state intermediate;
/* optimal watermarks (inverted) */
struct vlv_wm_state optimal;
/* display FIFO split */

Просмотреть файл

@ -1401,6 +1401,45 @@ static void vlv_atomic_update_fifo(struct intel_atomic_state *state,
#undef VLV_FIFO
static int vlv_compute_intermediate_wm(struct drm_device *dev,
struct intel_crtc *crtc,
struct intel_crtc_state *crtc_state)
{
struct vlv_wm_state *intermediate = &crtc_state->wm.vlv.intermediate;
const struct vlv_wm_state *optimal = &crtc_state->wm.vlv.optimal;
const struct vlv_wm_state *active = &crtc->wm.active.vlv;
int level;
intermediate->num_levels = min(optimal->num_levels, active->num_levels);
intermediate->cxsr = optimal->cxsr & active->cxsr;
for (level = 0; level < intermediate->num_levels; level++) {
enum plane_id plane_id;
for_each_plane_id_on_crtc(crtc, plane_id) {
intermediate->wm[level].plane[plane_id] =
min(optimal->wm[level].plane[plane_id],
active->wm[level].plane[plane_id]);
}
intermediate->sr[level].plane = min(optimal->sr[level].plane,
active->sr[level].plane);
intermediate->sr[level].cursor = min(optimal->sr[level].cursor,
active->sr[level].cursor);
}
vlv_invalidate_wms(crtc, intermediate, level);
/*
* If our intermediate WM are identical to the final WM, then we can
* omit the post-vblank programming; only update if it's different.
*/
if (memcmp(intermediate, optimal, sizeof(*intermediate)) == 0)
crtc_state->wm.need_postvbl_update = false;
return 0;
}
static void vlv_merge_wm(struct drm_i915_private *dev_priv,
struct vlv_wm_values *wm)
{
@ -1494,7 +1533,22 @@ static void vlv_initial_watermarks(struct intel_atomic_state *state,
struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
mutex_lock(&dev_priv->wm.wm_mutex);
crtc->wm.active.vlv = crtc_state->wm.vlv.optimal;
crtc->wm.active.vlv = crtc_state->wm.vlv.intermediate;
vlv_program_watermarks(dev_priv);
mutex_unlock(&dev_priv->wm.wm_mutex);
}
static void vlv_optimize_watermarks(struct intel_atomic_state *state,
struct intel_crtc_state *crtc_state)
{
struct drm_i915_private *dev_priv = to_i915(crtc_state->base.crtc->dev);
struct intel_crtc *intel_crtc = to_intel_crtc(crtc_state->base.crtc);
if (!crtc_state->wm.need_postvbl_update)
return;
mutex_lock(&dev_priv->wm.wm_mutex);
intel_crtc->wm.active.vlv = crtc_state->wm.vlv.optimal;
vlv_program_watermarks(dev_priv);
mutex_unlock(&dev_priv->wm.wm_mutex);
}
@ -4695,6 +4749,7 @@ void vlv_wm_get_hw_state(struct drm_device *dev)
vlv_invalidate_wms(crtc, active, level);
crtc_state->wm.vlv.optimal = *active;
crtc_state->wm.vlv.intermediate = *active;
DRM_DEBUG_KMS("Initial watermarks: pipe %c, plane=%d, cursor=%d, sprite0=%d, sprite1=%d\n",
pipe_name(pipe),
@ -7861,7 +7916,9 @@ void intel_init_pm(struct drm_i915_private *dev_priv)
} else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
vlv_setup_wm_latency(dev_priv);
dev_priv->display.compute_pipe_wm = vlv_compute_pipe_wm;
dev_priv->display.compute_intermediate_wm = vlv_compute_intermediate_wm;
dev_priv->display.initial_watermarks = vlv_initial_watermarks;
dev_priv->display.optimize_watermarks = vlv_optimize_watermarks;
dev_priv->display.atomic_update_watermarks = vlv_atomic_update_fifo;
} else if (IS_PINEVIEW(dev_priv)) {
if (!intel_get_cxsr_latency(IS_PINEVIEW_G(dev_priv),