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Subject[PATCH v3 03/10] drm/i915/gen9: Make skl_wm_level per-plane
Date
Having skl_wm_level contain all of the watermarks for each plane is
annoying since it prevents us from having any sort of object to
represent a single watermark level, something we take advantage of in
the next commit to cut down on all of the copy paste code in here.

Changes since v1:
- Style nitpicks
- Fix accidental usage of i vs. PLANE_CURSOR
- Split out skl_pipe_wm_active_state simplification into seperate patch

Signed-off-by: Lyude <cpaul@redhat.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Matt Roper <matthew.d.roper@intel.com
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
---
drivers/gpu/drm/i915/i915_drv.h | 6 +-
drivers/gpu/drm/i915/intel_drv.h | 6 +-
drivers/gpu/drm/i915/intel_pm.c | 207 +++++++++++++++++++--------------------
3 files changed, 111 insertions(+), 108 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index e56d4a4..4d1133f 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1653,9 +1653,9 @@ struct skl_wm_values {
};

struct skl_wm_level {
- bool plane_en[I915_MAX_PLANES];
- uint16_t plane_res_b[I915_MAX_PLANES];
- uint8_t plane_res_l[I915_MAX_PLANES];
+ bool plane_en;
+ uint16_t plane_res_b;
+ uint8_t plane_res_l;
};

/*
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 10a0cf2..84301d3 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -468,9 +468,13 @@ struct intel_pipe_wm {
bool sprites_scaled;
};

-struct skl_pipe_wm {
+struct skl_plane_wm {
struct skl_wm_level wm[8];
struct skl_wm_level trans_wm;
+};
+
+struct skl_pipe_wm {
+ struct skl_plane_wm planes[I915_MAX_PLANES];
uint32_t linetime;
};

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index a7d5721..1bdccc9 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3674,67 +3674,52 @@ static int
skl_compute_wm_level(const struct drm_i915_private *dev_priv,
struct skl_ddb_allocation *ddb,
struct intel_crtc_state *cstate,
+ struct intel_plane *intel_plane,
int level,
struct skl_wm_level *result)
{
struct drm_atomic_state *state = cstate->base.state;
struct intel_crtc *intel_crtc = to_intel_crtc(cstate->base.crtc);
- struct drm_plane *plane;
- struct intel_plane *intel_plane;
- struct intel_plane_state *intel_pstate;
+ struct drm_plane *plane = &intel_plane->base;
+ struct intel_plane_state *intel_pstate = NULL;
uint16_t ddb_blocks;
enum pipe pipe = intel_crtc->pipe;
int ret;
+ int i = skl_wm_plane_id(intel_plane);
+
+ if (state)
+ intel_pstate =
+ intel_atomic_get_existing_plane_state(state,
+ intel_plane);

/*
- * We'll only calculate watermarks for planes that are actually
- * enabled, so make sure all other planes are set as disabled.
+ * Note: If we start supporting multiple pending atomic commits against
+ * the same planes/CRTC's in the future, plane->state will no longer be
+ * the correct pre-state to use for the calculations here and we'll
+ * need to change where we get the 'unchanged' plane data from.
+ *
+ * For now this is fine because we only allow one queued commit against
+ * a CRTC. Even if the plane isn't modified by this transaction and we
+ * don't have a plane lock, we still have the CRTC's lock, so we know
+ * that no other transactions are racing with us to update it.
*/
- memset(result, 0, sizeof(*result));
+ if (!intel_pstate)
+ intel_pstate = to_intel_plane_state(plane->state);

- for_each_intel_plane_mask(&dev_priv->drm,
- intel_plane,
- cstate->base.plane_mask) {
- int i = skl_wm_plane_id(intel_plane);
-
- plane = &intel_plane->base;
- intel_pstate = NULL;
- if (state)
- intel_pstate =
- intel_atomic_get_existing_plane_state(state,
- intel_plane);
+ WARN_ON(!intel_pstate->base.fb);

- /*
- * Note: If we start supporting multiple pending atomic commits
- * against the same planes/CRTC's in the future, plane->state
- * will no longer be the correct pre-state to use for the
- * calculations here and we'll need to change where we get the
- * 'unchanged' plane data from.
- *
- * For now this is fine because we only allow one queued commit
- * against a CRTC. Even if the plane isn't modified by this
- * transaction and we don't have a plane lock, we still have
- * the CRTC's lock, so we know that no other transactions are
- * racing with us to update it.
- */
- if (!intel_pstate)
- intel_pstate = to_intel_plane_state(plane->state);
+ ddb_blocks = skl_ddb_entry_size(&ddb->plane[pipe][i]);

- WARN_ON(!intel_pstate->base.fb);
-
- ddb_blocks = skl_ddb_entry_size(&ddb->plane[pipe][i]);
-
- ret = skl_compute_plane_wm(dev_priv,
- cstate,
- intel_pstate,
- ddb_blocks,
- level,
- &result->plane_res_b[i],
- &result->plane_res_l[i],
- &result->plane_en[i]);
- if (ret)
- return ret;
- }
+ ret = skl_compute_plane_wm(dev_priv,
+ cstate,
+ intel_pstate,
+ ddb_blocks,
+ level,
+ &result->plane_res_b,
+ &result->plane_res_l,
+ &result->plane_en);
+ if (ret)
+ return ret;

return 0;
}
@@ -3755,19 +3740,11 @@ skl_compute_linetime_wm(struct intel_crtc_state *cstate)
static void skl_compute_transition_wm(struct intel_crtc_state *cstate,
struct skl_wm_level *trans_wm /* out */)
{
- struct drm_crtc *crtc = cstate->base.crtc;
- struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
- struct intel_plane *intel_plane;
-
if (!cstate->base.active)
return;

/* Until we know more, just disable transition WMs */
- for_each_intel_plane_on_crtc(crtc->dev, intel_crtc, intel_plane) {
- int i = skl_wm_plane_id(intel_plane);
-
- trans_wm->plane_en[i] = false;
- }
+ trans_wm->plane_en = false;
}

static int skl_build_pipe_wm(struct intel_crtc_state *cstate,
@@ -3776,19 +3753,33 @@ static int skl_build_pipe_wm(struct intel_crtc_state *cstate,
{
struct drm_device *dev = cstate->base.crtc->dev;
const struct drm_i915_private *dev_priv = to_i915(dev);
+ struct intel_plane *intel_plane;
+ struct skl_plane_wm *wm;
int level, max_level = ilk_wm_max_level(dev_priv);
int ret;

- for (level = 0; level <= max_level; level++) {
- ret = skl_compute_wm_level(dev_priv, ddb, cstate,
- level, &pipe_wm->wm[level]);
- if (ret)
- return ret;
+ /*
+ * We'll only calculate watermarks for planes that are actually
+ * enabled, so make sure all other planes are set as disabled.
+ */
+ memset(pipe_wm->planes, 0, sizeof(pipe_wm->planes));
+
+ for_each_intel_plane_mask(&dev_priv->drm,
+ intel_plane,
+ cstate->base.plane_mask) {
+ wm = &pipe_wm->planes[skl_wm_plane_id(intel_plane)];
+
+ for (level = 0; level <= max_level; level++) {
+ ret = skl_compute_wm_level(dev_priv, ddb, cstate,
+ intel_plane, level,
+ &wm->wm[level]);
+ if (ret)
+ return ret;
+ }
+ skl_compute_transition_wm(cstate, &wm->trans_wm);
}
pipe_wm->linetime = skl_compute_linetime_wm(cstate);

- skl_compute_transition_wm(cstate, &pipe_wm->trans_wm);
-
return 0;
}

@@ -3798,50 +3789,56 @@ static void skl_compute_wm_results(struct drm_device *dev,
struct intel_crtc *intel_crtc)
{
int level, max_level = ilk_wm_max_level(to_i915(dev));
+ struct skl_plane_wm *plane_wm;
enum pipe pipe = intel_crtc->pipe;
uint32_t temp;
int i;

- for (level = 0; level <= max_level; level++) {
- for (i = 0; i < intel_num_planes(intel_crtc); i++) {
+ for (i = 0; i < intel_num_planes(intel_crtc); i++) {
+ plane_wm = &p_wm->planes[i];
+
+ for (level = 0; level <= max_level; level++) {
temp = 0;

- temp |= p_wm->wm[level].plane_res_l[i] <<
+ temp |= plane_wm->wm[level].plane_res_l <<
PLANE_WM_LINES_SHIFT;
- temp |= p_wm->wm[level].plane_res_b[i];
- if (p_wm->wm[level].plane_en[i])
+ temp |= plane_wm->wm[level].plane_res_b;
+ if (plane_wm->wm[level].plane_en)
temp |= PLANE_WM_EN;

r->plane[pipe][i][level] = temp;
}

- temp = 0;
-
- temp |= p_wm->wm[level].plane_res_l[PLANE_CURSOR] << PLANE_WM_LINES_SHIFT;
- temp |= p_wm->wm[level].plane_res_b[PLANE_CURSOR];
+ }

- if (p_wm->wm[level].plane_en[PLANE_CURSOR])
+ for (level = 0; level <= max_level; level++) {
+ plane_wm = &p_wm->planes[PLANE_CURSOR];
+ temp = 0;
+ temp |= plane_wm->wm[level].plane_res_l << PLANE_WM_LINES_SHIFT;
+ temp |= plane_wm->wm[level].plane_res_b;
+ if (plane_wm->wm[level].plane_en)
temp |= PLANE_WM_EN;

r->plane[pipe][PLANE_CURSOR][level] = temp;
-
}

/* transition WMs */
for (i = 0; i < intel_num_planes(intel_crtc); i++) {
+ plane_wm = &p_wm->planes[i];
temp = 0;
- temp |= p_wm->trans_wm.plane_res_l[i] << PLANE_WM_LINES_SHIFT;
- temp |= p_wm->trans_wm.plane_res_b[i];
- if (p_wm->trans_wm.plane_en[i])
+ temp |= plane_wm->trans_wm.plane_res_l << PLANE_WM_LINES_SHIFT;
+ temp |= plane_wm->trans_wm.plane_res_b;
+ if (plane_wm->trans_wm.plane_en)
temp |= PLANE_WM_EN;

r->plane_trans[pipe][i] = temp;
}

+ plane_wm = &p_wm->planes[PLANE_CURSOR];
temp = 0;
- temp |= p_wm->trans_wm.plane_res_l[PLANE_CURSOR] << PLANE_WM_LINES_SHIFT;
- temp |= p_wm->trans_wm.plane_res_b[PLANE_CURSOR];
- if (p_wm->trans_wm.plane_en[PLANE_CURSOR])
+ temp |= plane_wm->trans_wm.plane_res_l << PLANE_WM_LINES_SHIFT;
+ temp |= plane_wm->trans_wm.plane_res_b;
+ if (plane_wm->trans_wm.plane_en)
temp |= PLANE_WM_EN;

r->plane_trans[pipe][PLANE_CURSOR] = temp;
@@ -4282,35 +4279,37 @@ static void skl_pipe_wm_active_state(uint32_t val,

if (!is_transwm) {
if (!is_cursor) {
- active->wm[level].plane_en[i] = is_enabled;
- active->wm[level].plane_res_b[i] =
- val & PLANE_WM_BLOCKS_MASK;
- active->wm[level].plane_res_l[i] =
- (val >> PLANE_WM_LINES_SHIFT) &
- PLANE_WM_LINES_MASK;
+ active->planes[i].wm[level].plane_en = is_enabled;
+ active->planes[i].wm[level].plane_res_b =
+ val & PLANE_WM_BLOCKS_MASK;
+ active->planes[i].wm[level].plane_res_l =
+ (val >> PLANE_WM_LINES_SHIFT) &
+ PLANE_WM_LINES_MASK;
} else {
- active->wm[level].plane_en[PLANE_CURSOR] = is_enabled;
- active->wm[level].plane_res_b[PLANE_CURSOR] =
- val & PLANE_WM_BLOCKS_MASK;
- active->wm[level].plane_res_l[PLANE_CURSOR] =
- (val >> PLANE_WM_LINES_SHIFT) &
- PLANE_WM_LINES_MASK;
+ active->planes[PLANE_CURSOR].wm[level].plane_en =
+ is_enabled;
+ active->planes[PLANE_CURSOR].wm[level].plane_res_b =
+ val & PLANE_WM_BLOCKS_MASK;
+ active->planes[PLANE_CURSOR].wm[level].plane_res_l =
+ (val >> PLANE_WM_LINES_SHIFT) &
+ PLANE_WM_LINES_MASK;
}
} else {
if (!is_cursor) {
- active->trans_wm.plane_en[i] = is_enabled;
- active->trans_wm.plane_res_b[i] =
- val & PLANE_WM_BLOCKS_MASK;
- active->trans_wm.plane_res_l[i] =
- (val >> PLANE_WM_LINES_SHIFT) &
- PLANE_WM_LINES_MASK;
+ active->planes[i].trans_wm.plane_en = is_enabled;
+ active->planes[i].trans_wm.plane_res_b =
+ val & PLANE_WM_BLOCKS_MASK;
+ active->planes[i].trans_wm.plane_res_l =
+ (val >> PLANE_WM_LINES_SHIFT) &
+ PLANE_WM_LINES_MASK;
} else {
- active->trans_wm.plane_en[PLANE_CURSOR] = is_enabled;
- active->trans_wm.plane_res_b[PLANE_CURSOR] =
- val & PLANE_WM_BLOCKS_MASK;
- active->trans_wm.plane_res_l[PLANE_CURSOR] =
- (val >> PLANE_WM_LINES_SHIFT) &
- PLANE_WM_LINES_MASK;
+ active->planes[PLANE_CURSOR].trans_wm.plane_en =
+ is_enabled;
+ active->planes[PLANE_CURSOR].trans_wm.plane_res_b =
+ val & PLANE_WM_BLOCKS_MASK;
+ active->planes[PLANE_CURSOR].trans_wm.plane_res_l =
+ (val >> PLANE_WM_LINES_SHIFT) &
+ PLANE_WM_LINES_MASK;
}
}
}
--
2.7.4
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