From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Introduce a new struct intel_pipe_wm which contains all the
watermarks for a single pipe. Use it to unify the LP0 and LP1+
watermark computations so that we can just iterate through the
watermark levels neatly and call ilk_compute_wm_level() for each.
Also add another tool ilk_wm_merge() that merges the LP1+ watermarks
from all pipes. For that, embed one intel_pipe_wm inside intel_crtc that
contains the currently valid watermarks for each pipe.
This is mainly preparatory work for pre-computing the watermarks for
each pipe and merging them at a later time. For now the merging still
happens immediately.
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/intel_drv.h | 12 +++
drivers/gpu/drm/i915/intel_pm.c | 190 +++++++++++++++++++++++----------------
2 files changed, 126 insertions(+), 76 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 8b132e2..664df77 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -293,6 +293,12 @@ struct intel_crtc_config {
bool ips_enabled;
};
+struct intel_pipe_wm {
+ struct intel_wm_level wm[5];
+ uint32_t linetime;
+ bool fbc_wm_enabled;
+};
+
struct intel_crtc {
struct drm_crtc base;
enum pipe pipe;
@@ -333,6 +339,12 @@ struct intel_crtc {
/* Access to these should be protected by dev_priv->irq_lock. */
bool cpu_fifo_underrun_disabled;
bool pch_fifo_underrun_disabled;
+
+ /* per-pipe watermark state */
+ struct {
+ /* watermarks currently being used */
+ struct intel_pipe_wm active;
+ } wm;
};
struct intel_plane_wm_parameters {
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 163ba74..c6f105f 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -2440,53 +2440,6 @@ static void ilk_compute_wm_level(struct drm_i915_private *dev_priv,
result->enable = true;
}
-static bool hsw_compute_lp_wm(struct drm_i915_private *dev_priv,
- int level, const struct hsw_wm_maximums *max,
- const struct hsw_pipe_wm_parameters *params,
- struct intel_wm_level *result)
-{
- enum pipe pipe;
- struct intel_wm_level res[3];
-
- for (pipe = PIPE_A; pipe <= PIPE_C; pipe++)
- ilk_compute_wm_level(dev_priv, level, ¶ms[pipe], &res[pipe]);
-
- result->pri_val = max3(res[0].pri_val, res[1].pri_val, res[2].pri_val);
- result->spr_val = max3(res[0].spr_val, res[1].spr_val, res[2].spr_val);
- result->cur_val = max3(res[0].cur_val, res[1].cur_val, res[2].cur_val);
- result->fbc_val = max3(res[0].fbc_val, res[1].fbc_val, res[2].fbc_val);
- result->enable = true;
-
- return ilk_check_wm(level, max, result);
-}
-
-
-static uint32_t hsw_compute_wm_pipe(struct drm_device *dev,
- const struct hsw_pipe_wm_parameters *params)
-{
- struct drm_i915_private *dev_priv = dev->dev_private;
- struct intel_wm_config config = {
- .num_pipes_active = 1,
- .sprites_enabled = params->spr.enabled,
- .sprites_scaled = params->spr.scaled,
- };
- struct hsw_wm_maximums max;
- struct intel_wm_level res;
-
- if (!params->active)
- return 0;
-
- ilk_wm_max(dev, 0, &config, INTEL_DDB_PART_1_2, &max);
-
- ilk_compute_wm_level(dev_priv, 0, params, &res);
-
- ilk_check_wm(0, &max, &res);
-
- return (res.pri_val << WM0_PIPE_PLANE_SHIFT) |
- (res.spr_val << WM0_PIPE_SPRITE_SHIFT) |
- res.cur_val;
-}
-
static uint32_t
hsw_compute_linetime_wm(struct drm_device *dev, struct drm_crtc *crtc)
{
@@ -2670,44 +2623,121 @@ static void hsw_compute_wm_parameters(struct drm_device *dev,
*lp_max_5_6 = *lp_max_1_2;
}
+/* Compute new watermarks for the pipe */
+static bool intel_compute_pipe_wm(struct drm_crtc *crtc,
+ const struct hsw_pipe_wm_parameters *params,
+ struct intel_pipe_wm *pipe_wm)
+{
+ struct drm_device *dev = crtc->dev;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ int level, max_level = ilk_wm_max_level(dev);
+ struct intel_wm_config config = {
+ .num_pipes_active = 1,
+ .sprites_enabled = params->spr.enabled,
+ .sprites_scaled = params->spr.scaled,
+ };
+ struct hsw_wm_maximums max;
+
+ memset(pipe_wm, 0, sizeof(*pipe_wm));
+
+ ilk_wm_max(dev, 0, &config, INTEL_DDB_PART_1_2, &max);
+
+ for (level = 0; level <= max_level; level++)
+ ilk_compute_wm_level(dev_priv, level, params,
+ &pipe_wm->wm[level]);
+
+ pipe_wm->linetime = hsw_compute_linetime_wm(dev, crtc);
+
+ /* At least LP0 must be valid */
+ return ilk_check_wm(0, &max, &pipe_wm->wm[0]);
+}
+
+/*
+ * Merge the watermarks from all active pipes for a specific level.
+ */
+static void ilk_merge_wm_level(struct drm_device *dev,
+ int level,
+ struct intel_wm_level *ret_wm)
+{
+ const struct intel_crtc *intel_crtc;
+
+ list_for_each_entry(intel_crtc, &dev->mode_config.crtc_list, base.head) {
+ const struct intel_wm_level *wm =
+ &intel_crtc->wm.active.wm[level];
+
+ if (!wm->enable)
+ return;
+
+ ret_wm->pri_val = max(ret_wm->pri_val, wm->pri_val);
+ ret_wm->spr_val = max(ret_wm->spr_val, wm->spr_val);
+ ret_wm->cur_val = max(ret_wm->cur_val, wm->cur_val);
+ ret_wm->fbc_val = max(ret_wm->fbc_val, wm->fbc_val);
+ }
+
+ ret_wm->enable = true;
+}
+
+/*
+ * Merge all low power watermarks for all active pipes.
+ */
+static void ilk_wm_merge(struct drm_device *dev,
+ const struct hsw_wm_maximums *max,
+ struct intel_pipe_wm *merged)
+{
+ int level, max_level = ilk_wm_max_level(dev);
+
+ merged->fbc_wm_enabled = true;
+
+ /* merge each WM1+ level */
+ for (level = 1; level <= max_level; level++) {
+ struct intel_wm_level *wm = &merged->wm[level];
+
+ ilk_merge_wm_level(dev, level, wm);
+
+ if (!ilk_check_wm(level, max, wm))
+ break;
+
+ /*
+ * The spec says it is preferred to disable
+ * FBC WMs instead of disabling a WM level.
+ */
+ if (wm->fbc_val > max->fbc) {
+ merged->fbc_wm_enabled = false;
+ wm->fbc_val = 0;
+ }
+ }
+}
+
static void hsw_compute_wm_results(struct drm_device *dev,
const struct hsw_pipe_wm_parameters *params,
const struct hsw_wm_maximums *lp_maximums,
struct hsw_wm_values *results)
{
- struct drm_i915_private *dev_priv = dev->dev_private;
- struct drm_crtc *crtc;
- struct intel_wm_level lp_results[4] = {};
- enum pipe pipe;
- int level, max_level, wm_lp;
+ struct intel_crtc *intel_crtc;
+ int level, wm_lp;
+ struct intel_pipe_wm lp_wm = {};
- for (level = 1; level <= 4; level++)
- if (!hsw_compute_lp_wm(dev_priv, level,
- lp_maximums, params,
- &lp_results[level - 1]))
- break;
- max_level = level - 1;
+ list_for_each_entry(intel_crtc, &dev->mode_config.crtc_list, base.head)
+ intel_compute_pipe_wm(&intel_crtc->base,
+ ¶ms[intel_crtc->pipe],
+ &intel_crtc->wm.active);
+
+ ilk_wm_merge(dev, lp_maximums, &lp_wm);
memset(results, 0, sizeof(*results));
- /* The spec says it is preferred to disable FBC WMs instead of disabling
- * a WM level. */
- results->enable_fbc_wm = true;
- for (level = 1; level <= max_level; level++) {
- if (lp_results[level - 1].fbc_val > lp_maximums->fbc) {
- results->enable_fbc_wm = false;
- lp_results[level - 1].fbc_val = 0;
- }
- }
+ results->enable_fbc_wm = lp_wm.fbc_wm_enabled;
+ /* LP1+ register values */
for (wm_lp = 1; wm_lp <= 3; wm_lp++) {
const struct intel_wm_level *r;
- level = (max_level == 4 && wm_lp > 1) ? wm_lp + 1 : wm_lp;
- if (level > max_level)
+ level = wm_lp + (wm_lp >= 2 && lp_wm.wm[4].enable);
+
+ r = &lp_wm.wm[level];
+ if (!r->enable)
break;
- r = &lp_results[level - 1];
results->wm_lp[wm_lp - 1] = HSW_WM_LP_VAL(level * 2,
r->fbc_val,
r->pri_val,
@@ -2715,13 +2745,21 @@ static void hsw_compute_wm_results(struct drm_device *dev,
results->wm_lp_spr[wm_lp - 1] = r->spr_val;
}
- for_each_pipe(pipe)
- results->wm_pipe[pipe] = hsw_compute_wm_pipe(dev,
- ¶ms[pipe]);
+ /* LP0 register values */
+ list_for_each_entry(intel_crtc, &dev->mode_config.crtc_list, base.head) {
+ enum pipe pipe = intel_crtc->pipe;
+ const struct intel_wm_level *r =
+ &intel_crtc->wm.active.wm[0];
- for_each_pipe(pipe) {
- crtc = dev_priv->pipe_to_crtc_mapping[pipe];
- results->wm_linetime[pipe] = hsw_compute_linetime_wm(dev, crtc);
+ if (!r->enable)
+ continue;
+
+ results->wm_linetime[pipe] = intel_crtc->wm.active.linetime;
+
+ results->wm_pipe[pipe] =
+ (r->pri_val << WM0_PIPE_PLANE_SHIFT) |
+ (r->spr_val << WM0_PIPE_SPRITE_SHIFT) |
+ r->cur_val;
}
}
--
1.8.1.5
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