[Intel-gfx] [PATCH 13/19] drm/i915: Allow planes to declare their minimum acceptable cdclk
Ville Syrjala
ville.syrjala at linux.intel.com
Mon Jul 8 12:53:19 UTC 2019
From: Ville Syrjälä <ville.syrjala at linux.intel.com>
Various pixel formats and plane scaling impose additional constraints
on the cdclk frequency. Provide a new plane->min_cdclk() hook that
will be used to compute the minimum acceptable cdclk frequency for
each plane.
Annoyingly on some platforms the numer of active planes affects
this calculation so we must also toss in more planes into the
state when the number of active planes changes.
The sequence of state computation must also be changed:
1. check_plane() (updates plane's visibility etc.)
2. figure out if more planes now require update min_cdclk
computaion
3. calculate the new min cdclk for each plane in the state
4. if the minimum of any plane now exceeds the current
logical cdclk we recompute the cdclk
4. during cdclk computation take the planes' min_cdclk into
accoutn
5. follow the normal cdclk programming to change the
cdclk frequency. This may now require a modeset (except
on bxt/glk in some cases), which either succeeds or
fails depending on whether userspace has given
us permission to perform a modeset or not.
Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
.../gpu/drm/i915/display/intel_atomic_plane.c | 30 ++
.../gpu/drm/i915/display/intel_atomic_plane.h | 2 +
drivers/gpu/drm/i915/display/intel_cdclk.c | 16 +
drivers/gpu/drm/i915/display/intel_display.c | 187 ++++++++--
drivers/gpu/drm/i915/display/intel_sprite.c | 342 ++++++++++++++++++
drivers/gpu/drm/i915/display/intel_sprite.h | 7 +
drivers/gpu/drm/i915/intel_drv.h | 4 +
7 files changed, 566 insertions(+), 22 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_atomic_plane.c b/drivers/gpu/drm/i915/display/intel_atomic_plane.c
index d7493551b28c..91e841d38086 100644
--- a/drivers/gpu/drm/i915/display/intel_atomic_plane.c
+++ b/drivers/gpu/drm/i915/display/intel_atomic_plane.c
@@ -137,6 +137,35 @@ unsigned int intel_plane_data_rate(const struct intel_crtc_state *crtc_state,
return cpp * crtc_state->pixel_rate;
}
+bool intel_plane_calc_min_cdclk(struct intel_atomic_state *state,
+ struct intel_plane *plane)
+{
+ const struct intel_plane_state *plane_state =
+ intel_atomic_get_new_plane_state(state, plane);
+ struct intel_crtc *crtc = to_intel_crtc(plane_state->base.crtc);
+ struct intel_crtc_state *crtc_state;
+
+ if (!plane_state->base.visible || !plane->min_cdclk)
+ return false;
+
+ crtc_state = intel_atomic_get_new_crtc_state(state, crtc);
+
+ crtc_state->min_cdclk[plane->id] =
+ plane->min_cdclk(crtc_state, plane_state);
+
+ DRM_DEBUG_KMS("[PLANE:%d:%s] min_cdclk %d kHz (logical cdclk %d kHz)\n",
+ plane->base.base.id, plane->base.name,
+ crtc_state->min_cdclk[plane->id],
+ state->cdclk.logical.cdclk);
+
+ /* should have been populated in intel_atomic_check_planes() */
+ WARN_ON(state->cdclk.logical.cdclk == 0);
+
+ /* Does the cdclk need to be bumbed up? */
+ return crtc_state->min_cdclk[plane->id] >
+ state->cdclk.logical.cdclk;
+}
+
int intel_plane_atomic_check_with_state(const struct intel_crtc_state *old_crtc_state,
struct intel_crtc_state *new_crtc_state,
const struct intel_plane_state *old_plane_state,
@@ -150,6 +179,7 @@ int intel_plane_atomic_check_with_state(const struct intel_crtc_state *old_crtc_
new_crtc_state->nv12_planes &= ~BIT(plane->id);
new_crtc_state->c8_planes &= ~BIT(plane->id);
new_crtc_state->data_rate[plane->id] = 0;
+ new_crtc_state->min_cdclk[plane->id] = 0;
new_plane_state->base.visible = false;
if (!new_plane_state->base.crtc && !old_plane_state->base.crtc)
diff --git a/drivers/gpu/drm/i915/display/intel_atomic_plane.h b/drivers/gpu/drm/i915/display/intel_atomic_plane.h
index dc85af02e9b7..e61e9a82aadf 100644
--- a/drivers/gpu/drm/i915/display/intel_atomic_plane.h
+++ b/drivers/gpu/drm/i915/display/intel_atomic_plane.h
@@ -47,5 +47,7 @@ int intel_plane_atomic_calc_changes(const struct intel_crtc_state *old_crtc_stat
struct intel_crtc_state *crtc_state,
const struct intel_plane_state *old_plane_state,
struct intel_plane_state *plane_state);
+bool intel_plane_calc_min_cdclk(struct intel_atomic_state *state,
+ struct intel_plane *plane);
#endif /* __INTEL_ATOMIC_PLANE_H__ */
diff --git a/drivers/gpu/drm/i915/display/intel_cdclk.c b/drivers/gpu/drm/i915/display/intel_cdclk.c
index 40583d8d259b..1871c56e48ea 100644
--- a/drivers/gpu/drm/i915/display/intel_cdclk.c
+++ b/drivers/gpu/drm/i915/display/intel_cdclk.c
@@ -2227,6 +2227,19 @@ static int intel_pixel_rate_to_cdclk(const struct intel_crtc_state *crtc_state)
return DIV_ROUND_UP(pixel_rate * 100, 90);
}
+static int intel_planes_min_cdclk(const struct intel_crtc_state *crtc_state)
+{
+ struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+ struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+ struct intel_plane *plane;
+ int min_cdclk = 0;
+
+ for_each_intel_plane_on_crtc(&dev_priv->drm, crtc, plane)
+ min_cdclk = max(crtc_state->min_cdclk[plane->id], min_cdclk);
+
+ return min_cdclk;
+}
+
int intel_crtc_compute_min_cdclk(const struct intel_crtc_state *crtc_state)
{
struct drm_i915_private *dev_priv =
@@ -2284,6 +2297,9 @@ int intel_crtc_compute_min_cdclk(const struct intel_crtc_state *crtc_state)
IS_GEMINILAKE(dev_priv))
min_cdclk = max(158400, min_cdclk);
+ /* Account for additional needs from the planes */
+ min_cdclk = max(intel_planes_min_cdclk(crtc_state), min_cdclk);
+
if (min_cdclk > dev_priv->max_cdclk_freq) {
DRM_DEBUG_KMS("required cdclk (%d kHz) exceeds max (%d kHz)\n",
min_cdclk, dev_priv->max_cdclk_freq);
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index eaed4aee4ee4..68738d177fd9 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -3167,6 +3167,7 @@ static void intel_plane_disable_noatomic(struct intel_crtc *crtc,
intel_set_plane_visible(crtc_state, plane_state, false);
fixup_active_planes(crtc_state);
crtc_state->data_rate[plane->id] = 0;
+ crtc_state->min_cdclk[plane->id] = 0;
if (plane->id == PLANE_PRIMARY)
intel_pre_disable_primary_noatomic(&crtc->base);
@@ -3561,6 +3562,53 @@ int skl_check_plane_surface(struct intel_plane_state *plane_state)
return 0;
}
+static void i9xx_plane_ratio(const struct intel_crtc_state *crtc_state,
+ const struct intel_plane_state *plane_state,
+ unsigned int *num, unsigned int *den)
+{
+ const struct drm_framebuffer *fb = plane_state->base.fb;
+ unsigned int cpp = fb->format->cpp[0];
+
+ /*
+ * g4x bspec says 64bpp pixel rate can't exceed 80%
+ * of cdclk when the sprite plane is enabled on the
+ * same pipe. ilk/snb bspec says 64bpp pixel rate is
+ * never allowed to exceed 80% of cdclk. Let's just go
+ * with the ilk/snb limit always.
+ */
+ if (cpp == 8) {
+ *num = 10;
+ *den = 8;
+ } else {
+ *num = 1;
+ *den = 1;
+ }
+}
+
+static int i9xx_plane_min_cdclk(const struct intel_crtc_state *crtc_state,
+ const struct intel_plane_state *plane_state)
+{
+ unsigned int pixel_rate;
+ unsigned int num, den;
+
+ /*
+ * Note that crtc_state->pixel_rate accounts for both
+ * horizontal and vertical panel fitter downscaling factors.
+ * Pre-HSW bspec tells us to only consider the horizontal
+ * downscaling factor here. We ignore that and just consider
+ * both for simplicity.
+ */
+ pixel_rate = crtc_state->pixel_rate;
+
+ i9xx_plane_ratio(crtc_state, plane_state, &num, &den);
+
+ /* two pixels per clock with double wide pipe */
+ if (crtc_state->double_wide)
+ den *= 2;
+
+ return DIV_ROUND_UP(pixel_rate * num, den);
+}
+
unsigned int
i9xx_plane_max_stride(struct intel_plane *plane,
u32 pixel_format, u64 modifier,
@@ -11508,6 +11556,7 @@ int intel_plane_atomic_calc_changes(const struct intel_crtc_state *old_crtc_stat
plane_state->base.visible = visible = false;
crtc_state->active_planes &= ~BIT(plane->id);
crtc_state->data_rate[plane->id] = 0;
+ crtc_state->min_cdclk[plane->id] = 0;
}
if (!was_visible && !visible)
@@ -11796,9 +11845,6 @@ static int intel_crtc_atomic_check(struct intel_atomic_state *state,
if (INTEL_GEN(dev_priv) >= 9) {
if (mode_changed || crtc_state->update_pipe)
ret = skl_update_scaler_crtc(crtc_state);
-
- if (!ret)
- ret = icl_check_nv12_planes(crtc_state);
if (!ret)
ret = skl_check_pipe_max_pixel_rate(crtc, crtc_state);
if (!ret)
@@ -13458,12 +13504,49 @@ static void intel_crtc_check_fastset(const struct intel_crtc_state *old_crtc_sta
new_crtc_state->has_drrs = old_crtc_state->has_drrs;
}
-static int intel_atomic_check_planes(struct intel_atomic_state *state)
+static int intel_crtc_add_planes_to_state(struct intel_atomic_state *state,
+ struct intel_crtc *crtc,
+ u8 plane_ids_mask)
{
+ struct drm_i915_private *dev_priv = to_i915(state->base.dev);
+ struct intel_plane *plane;
+
+ for_each_intel_plane_on_crtc(&dev_priv->drm, crtc, plane) {
+ struct intel_plane_state *plane_state;
+
+ if ((plane_ids_mask & plane->id) == 0)
+ continue;
+
+ plane_state = intel_atomic_get_plane_state(state, plane);
+ if (IS_ERR(plane_state))
+ return PTR_ERR(plane_state);
+ }
+
+ return 0;
+}
+
+static bool active_planes_affects_min_cdclk(struct drm_i915_private *dev_priv)
+{
+ /* See {hsw,vlv,ivb}_plane_ratio() */
+ return IS_BROADWELL(dev_priv) || IS_HASWELL(dev_priv) ||
+ IS_CHERRYVIEW(dev_priv) || IS_VALLEYVIEW(dev_priv) ||
+ IS_IVYBRIDGE(dev_priv);
+}
+
+static int intel_atomic_check_planes(struct intel_atomic_state *state,
+ bool *need_modeset)
+{
+ struct drm_i915_private *dev_priv = to_i915(state->base.dev);
+ struct intel_crtc_state *old_crtc_state, *new_crtc_state;
struct intel_plane_state *plane_state;
struct intel_plane *plane;
+ struct intel_crtc *crtc;
int i, ret;
+ ret = icl_add_linked_planes(state);
+ if (ret)
+ return ret;
+
for_each_new_intel_plane_in_state(state, plane, plane_state, i) {
ret = intel_plane_atomic_check(state, plane);
if (ret) {
@@ -13473,6 +13556,44 @@ static int intel_atomic_check_planes(struct intel_atomic_state *state)
}
}
+ for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state,
+ new_crtc_state, i) {
+ u8 old_active_planes, new_active_planes;
+
+ /* safe as long as we are holding at least one crtc mutex */
+ state->cdclk.logical = dev_priv->cdclk.logical;
+
+ ret = icl_check_nv12_planes(new_crtc_state);
+ if (ret)
+ return ret;
+
+ /*
+ * On some platforms the number of active planes affects
+ * the planes' minumum cdclk calculation. Add such planes
+ * to the state before we compute the minimum cdclk.
+ */
+ if (!active_planes_affects_min_cdclk(dev_priv))
+ continue;
+
+ old_active_planes = old_crtc_state->active_planes & ~BIT(PLANE_CURSOR);
+ new_active_planes = new_crtc_state->active_planes & ~BIT(PLANE_CURSOR);
+
+ if (hweight8(old_active_planes) == hweight8(new_active_planes))
+ continue;
+
+ ret = intel_crtc_add_planes_to_state(state, crtc, new_active_planes);
+ if (ret)
+ return ret;
+ }
+
+ /*
+ * active_planes bitmask has been updated, and potentially
+ * affected planes are part of the state. We can now
+ * compute the minumum cdclk for each plane.
+ */
+ for_each_new_intel_plane_in_state(state, plane, plane_state, i)
+ *need_modeset |= intel_plane_calc_min_cdclk(state, plane);
+
return 0;
}
@@ -13553,22 +13674,16 @@ static int intel_atomic_check(struct drm_device *dev,
any_ms |= state->cdclk.force_min_cdclk_changed;
+ ret = intel_atomic_check_planes(state, &any_ms);
+ if (ret)
+ goto fail;
+
if (any_ms) {
ret = intel_modeset_checks(state);
if (ret)
goto fail;
- } else {
- state->cdclk.logical = dev_priv->cdclk.logical;
}
- ret = icl_add_linked_planes(state);
- if (ret)
- goto fail;
-
- ret = intel_atomic_check_planes(state);
- if (ret)
- goto fail;
-
ret = intel_atomic_check_crtcs(state);
if (ret)
goto fail;
@@ -14809,6 +14924,15 @@ intel_primary_plane_create(struct drm_i915_private *dev_priv, enum pipe pipe)
plane->get_hw_state = i9xx_plane_get_hw_state;
plane->check_plane = i9xx_plane_check;
+ if (IS_BROADWELL(dev_priv) || IS_HASWELL(dev_priv))
+ plane->min_cdclk = hsw_plane_min_cdclk;
+ else if (IS_IVYBRIDGE(dev_priv))
+ plane->min_cdclk = ivb_plane_min_cdclk;
+ else if (IS_CHERRYVIEW(dev_priv) || IS_VALLEYVIEW(dev_priv))
+ plane->min_cdclk = vlv_plane_min_cdclk;
+ else
+ plane->min_cdclk = i9xx_plane_min_cdclk;
+
plane_funcs = &i965_plane_funcs;
} else {
formats = i8xx_primary_formats;
@@ -14820,6 +14944,7 @@ intel_primary_plane_create(struct drm_i915_private *dev_priv, enum pipe pipe)
plane->disable_plane = i9xx_disable_plane;
plane->get_hw_state = i9xx_plane_get_hw_state;
plane->check_plane = i9xx_plane_check;
+ plane->min_cdclk = i9xx_plane_min_cdclk;
plane_funcs = &i8xx_plane_funcs;
}
@@ -16725,19 +16850,11 @@ static void intel_modeset_readout_hw_state(struct drm_device *dev)
intel_crtc_compute_pixel_rate(crtc_state);
- min_cdclk = intel_crtc_compute_min_cdclk(crtc_state);
- if (WARN_ON(min_cdclk < 0))
- min_cdclk = 0;
-
drm_calc_timestamping_constants(&crtc->base,
&crtc_state->base.adjusted_mode);
update_scanline_offset(crtc_state);
}
- dev_priv->min_cdclk[crtc->pipe] = min_cdclk;
- dev_priv->min_voltage_level[crtc->pipe] =
- crtc_state->min_voltage_level;
-
for_each_intel_plane_on_crtc(&dev_priv->drm, crtc, plane) {
const struct intel_plane_state *plane_state =
to_intel_plane_state(plane->base.state);
@@ -16749,8 +16866,34 @@ static void intel_modeset_readout_hw_state(struct drm_device *dev)
if (plane_state->base.visible)
crtc_state->data_rate[plane->id] =
4 * crtc_state->pixel_rate;
+ /*
+ * FIXME don't have the fb yet, so can't
+ * use plane->min_cdclk() :(
+ */
+ if (plane_state->base.visible && plane->min_cdclk) {
+ if (crtc_state->double_wide ||
+ INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv))
+ crtc_state->min_cdclk[plane->id] =
+ DIV_ROUND_UP(crtc_state->pixel_rate, 2);
+ else
+ crtc_state->min_cdclk[plane->id] =
+ crtc_state->pixel_rate;
+ }
+ DRM_DEBUG_KMS("[PLANE:%d:%s] min_cdclk %d kHz\n",
+ plane->base.base.id, plane->base.name,
+ crtc_state->min_cdclk[plane->id]);
+ }
+
+ if (crtc_state->base.active) {
+ min_cdclk = intel_crtc_compute_min_cdclk(crtc_state);
+ if (WARN_ON(min_cdclk < 0))
+ min_cdclk = 0;
}
+ dev_priv->min_cdclk[crtc->pipe] = min_cdclk;
+ dev_priv->min_voltage_level[crtc->pipe] =
+ crtc_state->min_voltage_level;
+
intel_bw_crtc_update(bw_state, crtc_state);
intel_pipe_config_sanity_check(dev_priv, crtc_state);
diff --git a/drivers/gpu/drm/i915/display/intel_sprite.c b/drivers/gpu/drm/i915/display/intel_sprite.c
index e89f3f7fae05..a07887279e1a 100644
--- a/drivers/gpu/drm/i915/display/intel_sprite.c
+++ b/drivers/gpu/drm/i915/display/intel_sprite.c
@@ -317,6 +317,56 @@ int intel_plane_check_src_coordinates(struct intel_plane_state *plane_state)
return 0;
}
+static void
+skl_plane_ratio(const struct intel_crtc_state *crtc_state,
+ const struct intel_plane_state *plane_state,
+ unsigned int *num, unsigned int *den)
+{
+ struct drm_i915_private *dev_priv = to_i915(plane_state->base.plane->dev);
+ const struct drm_framebuffer *fb = plane_state->base.fb;
+
+ if (fb->format->cpp[0] == 8) {
+ if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv)) {
+ *num = 10;
+ *den = 8;
+ } else {
+ *num = 9;
+ *den = 8;
+ }
+ } else {
+ *num = 1;
+ *den = 1;
+ }
+}
+
+static int skl_plane_min_cdclk(const struct intel_crtc_state *crtc_state,
+ const struct intel_plane_state *plane_state)
+{
+ struct drm_i915_private *dev_priv = to_i915(plane_state->base.plane->dev);
+ unsigned int pixel_rate = crtc_state->pixel_rate;
+ unsigned int src_w, src_h, dst_w, dst_h;
+ unsigned int num, den;
+
+ skl_plane_ratio(crtc_state, plane_state, &num, &den);
+
+ /* two pixels per clock on glk+ */
+ if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv))
+ den *= 2;
+
+ src_w = drm_rect_width(&plane_state->base.src) >> 16;
+ src_h = drm_rect_height(&plane_state->base.src) >> 16;
+ dst_w = drm_rect_width(&plane_state->base.dst);
+ dst_h = drm_rect_height(&plane_state->base.dst);
+
+ /* Downscaling limits the maximum pixel rate */
+ dst_w = min(src_w, dst_w);
+ dst_h = min(src_h, dst_h);
+
+ return DIV64_U64_ROUND_UP(mul_u32_u32(pixel_rate * num, src_w * src_h),
+ mul_u32_u32(den, dst_w * dst_h));
+}
+
+
static unsigned int
skl_plane_max_stride(struct intel_plane *plane,
u32 pixel_format, u64 modifier,
@@ -779,6 +829,85 @@ vlv_update_clrc(const struct intel_plane_state *plane_state)
SP_SH_SIN(sh_sin) | SP_SH_COS(sh_cos));
}
+static void
+vlv_plane_ratio(const struct intel_crtc_state *crtc_state,
+ const struct intel_plane_state *plane_state,
+ unsigned int *num, unsigned int *den)
+{
+ u8 active_planes = crtc_state->active_planes & ~BIT(PLANE_CURSOR);
+ const struct drm_framebuffer *fb = plane_state->base.fb;
+ unsigned int cpp = fb->format->cpp[0];
+
+ /*
+ * VLV bspec only considers cases where all three planes are
+ * enabled, and cases where the primary and one sprite is enabled.
+ * Let's assume the case with just two sprites enabled also
+ * maps to the latter case.
+ */
+ if (hweight8(active_planes) == 3) {
+ switch (cpp) {
+ case 8:
+ *num = 11;
+ *den = 8;
+ break;
+ case 4:
+ *num = 18;
+ *den = 16;
+ break;
+ default:
+ *num = 1;
+ *den = 1;
+ break;
+ }
+ } else if (hweight8(active_planes) == 2) {
+ switch (cpp) {
+ case 8:
+ *num = 10;
+ *den = 8;
+ break;
+ case 4:
+ *num = 17;
+ *den = 16;
+ break;
+ default:
+ *num = 1;
+ *den = 1;
+ break;
+ }
+ } else {
+ switch (cpp) {
+ case 8:
+ *num = 10;
+ *den = 8;
+ break;
+ default:
+ *num = 1;
+ *den = 1;
+ break;
+ }
+ }
+}
+
+int vlv_plane_min_cdclk(const struct intel_crtc_state *crtc_state,
+ const struct intel_plane_state *plane_state)
+{
+ unsigned int pixel_rate;
+ unsigned int num, den;
+
+ /*
+ * Note that crtc_state->pixel_rate accounts for both
+ * horizontal and vertical panel fitter downscaling factors.
+ * Pre-HSW bspec tells us to only consider the horizontal
+ * downscaling factor here. We ignore that and just consider
+ * both for simplicity.
+ */
+ pixel_rate = crtc_state->pixel_rate;
+
+ vlv_plane_ratio(crtc_state, plane_state, &num, &den);
+
+ return DIV_ROUND_UP(pixel_rate * num, den);
+}
+
static u32 vlv_sprite_ctl_crtc(const struct intel_crtc_state *crtc_state)
{
u32 sprctl = 0;
@@ -985,6 +1114,164 @@ vlv_plane_get_hw_state(struct intel_plane *plane,
return ret;
}
+static void ivb_plane_ratio(const struct intel_crtc_state *crtc_state,
+ const struct intel_plane_state *plane_state,
+ unsigned int *num, unsigned int *den)
+{
+ u8 active_planes = crtc_state->active_planes & ~BIT(PLANE_CURSOR);
+ const struct drm_framebuffer *fb = plane_state->base.fb;
+ unsigned int cpp = fb->format->cpp[0];
+
+ if (hweight8(active_planes) == 2) {
+ switch (cpp) {
+ case 8:
+ *num = 10;
+ *den = 8;
+ break;
+ case 4:
+ *num = 17;
+ *den = 16;
+ break;
+ default:
+ *num = 1;
+ *den = 1;
+ break;
+ }
+ } else {
+ switch (cpp) {
+ case 8:
+ *num = 9;
+ *den = 8;
+ break;
+ default:
+ *num = 1;
+ *den = 1;
+ break;
+ }
+ }
+}
+
+static void ivb_plane_ratio_scaling(const struct intel_crtc_state *crtc_state,
+ const struct intel_plane_state *plane_state,
+ unsigned int *num, unsigned int *den)
+{
+ const struct drm_framebuffer *fb = plane_state->base.fb;
+ unsigned int cpp = fb->format->cpp[0];
+
+ switch (cpp) {
+ case 8:
+ *num = 12;
+ *den = 8;
+ break;
+ case 4:
+ *num = 19;
+ *den = 16;
+ break;
+ case 2:
+ *num = 33;
+ *den = 32;
+ break;
+ default:
+ *num = 1;
+ *den = 1;
+ break;
+ }
+}
+
+int ivb_plane_min_cdclk(const struct intel_crtc_state *crtc_state,
+ const struct intel_plane_state *plane_state)
+{
+ unsigned int pixel_rate;
+ unsigned int num, den;
+
+ /*
+ * Note that crtc_state->pixel_rate accounts for both
+ * horizontal and vertical panel fitter downscaling factors.
+ * Pre-HSW bspec tells us to only consider the horizontal
+ * downscaling factor here. We ignore that and just consider
+ * both for simplicity.
+ */
+ pixel_rate = crtc_state->pixel_rate;
+
+ ivb_plane_ratio(crtc_state, plane_state, &num, &den);
+
+ return DIV_ROUND_UP(pixel_rate * num, den);
+}
+
+static int ivb_sprite_min_cdclk(const struct intel_crtc_state *crtc_state,
+ const struct intel_plane_state *plane_state)
+{
+ unsigned int src_w, dst_w, pixel_rate;
+ unsigned int num, den;
+
+ /*
+ * Note that crtc_state->pixel_rate accounts for both
+ * horizontal and vertical panel fitter downscaling factors.
+ * Pre-HSW bspec tells us to only consider the horizontal
+ * downscaling factor here. We ignore that and just consider
+ * both for simplicity.
+ */
+ pixel_rate = crtc_state->pixel_rate;
+
+ src_w = drm_rect_width(&plane_state->base.src) >> 16;
+ dst_w = drm_rect_width(&plane_state->base.dst);
+
+ if (src_w != dst_w)
+ ivb_plane_ratio_scaling(crtc_state, plane_state, &num, &den);
+ else
+ ivb_plane_ratio(crtc_state, plane_state, &num, &den);
+
+ /* Horizontal downscaling limits the maximum pixel rate */
+ dst_w = min(src_w, dst_w);
+
+ return DIV_ROUND_UP_ULL(mul_u32_u32(pixel_rate, num * src_w),
+ den * dst_w);
+}
+
+static void hsw_plane_ratio(const struct intel_crtc_state *crtc_state,
+ const struct intel_plane_state *plane_state,
+ unsigned int *num, unsigned int *den)
+{
+ u8 active_planes = crtc_state->active_planes & ~BIT(PLANE_CURSOR);
+ const struct drm_framebuffer *fb = plane_state->base.fb;
+ unsigned int cpp = fb->format->cpp[0];
+
+ if (hweight8(active_planes) == 2) {
+ switch (cpp) {
+ case 8:
+ *num = 10;
+ *den = 8;
+ break;
+ default:
+ *num = 1;
+ *den = 1;
+ break;
+ }
+ } else {
+ switch (cpp) {
+ case 8:
+ *num = 9;
+ *den = 8;
+ break;
+ default:
+ *num = 1;
+ *den = 1;
+ break;
+ }
+ }
+}
+
+int hsw_plane_min_cdclk(const struct intel_crtc_state *crtc_state,
+ const struct intel_plane_state *plane_state)
+{
+ unsigned int pixel_rate = crtc_state->pixel_rate;
+ unsigned int num, den;
+
+ hsw_plane_ratio(crtc_state, plane_state, &num, &den);
+
+ return DIV_ROUND_UP(pixel_rate * num, den);
+}
+
static u32 ivb_sprite_ctl_crtc(const struct intel_crtc_state *crtc_state)
{
u32 sprctl = 0;
@@ -1211,6 +1498,53 @@ ivb_plane_get_hw_state(struct intel_plane *plane,
return ret;
}
+static int g4x_sprite_min_cdclk(const struct intel_crtc_state *crtc_state,
+ const struct intel_plane_state *plane_state)
+{
+ const struct drm_framebuffer *fb = plane_state->base.fb;
+ unsigned int hscale, pixel_rate;
+ unsigned int limit, decimate;
+
+ /*
+ * Note that crtc_state->pixel_rate accounts for both
+ * horizontal and vertical panel fitter downscaling factors.
+ * Pre-HSW bspec tells us to only consider the horizontal
+ * downscaling factor here. We ignore that and just consider
+ * both for simplicity.
+ */
+ pixel_rate = crtc_state->pixel_rate;
+
+ /* Horizontal downscaling limits the maximum pixel rate */
+ hscale = drm_rect_calc_hscale(&plane_state->base.src,
+ &plane_state->base.dst,
+ 0, INT_MAX);
+ if (hscale < 0x10000)
+ return pixel_rate;
+
+ /* Decimation steps at 2x,4x,8x,16x */
+ decimate = ilog2(hscale >> 16);
+ hscale >>= decimate;
+
+ /* Starting limit is 90% of cdclk */
+ limit = 9;
+
+ /* -10% per decimation step */
+ limit -= decimate;
+
+ /* -10% for RGB */
+ if (fb->format->cpp[0] >= 4)
+ limit--; /* -10% for RGB */
+
+ /*
+ * We should also do -10% if sprite scaling is enabled
+ * on the other pipe, but we can't really check for that,
+ * so we ignore it.
+ */
+
+ return DIV_ROUND_UP_ULL(mul_u32_u32(pixel_rate, 10 * hscale),
+ limit << 16);
+}
+
static unsigned int
g4x_sprite_max_stride(struct intel_plane *plane,
u32 pixel_format, u64 modifier,
@@ -2413,6 +2747,7 @@ skl_universal_plane_create(struct drm_i915_private *dev_priv,
plane->disable_plane = skl_disable_plane;
plane->get_hw_state = skl_plane_get_hw_state;
plane->check_plane = skl_plane_check;
+ plane->min_cdclk = skl_plane_min_cdclk;
if (icl_is_nv12_y_plane(plane_id))
plane->update_slave = icl_update_slave;
@@ -2510,6 +2845,7 @@ intel_sprite_plane_create(struct drm_i915_private *dev_priv,
plane->disable_plane = vlv_disable_plane;
plane->get_hw_state = vlv_plane_get_hw_state;
plane->check_plane = vlv_sprite_check;
+ plane->min_cdclk = vlv_plane_min_cdclk;
formats = vlv_plane_formats;
num_formats = ARRAY_SIZE(vlv_plane_formats);
@@ -2523,6 +2859,11 @@ intel_sprite_plane_create(struct drm_i915_private *dev_priv,
plane->get_hw_state = ivb_plane_get_hw_state;
plane->check_plane = g4x_sprite_check;
+ if (IS_BROADWELL(dev_priv) || IS_HASWELL(dev_priv))
+ plane->min_cdclk = hsw_plane_min_cdclk;
+ else
+ plane->min_cdclk = ivb_sprite_min_cdclk;
+
formats = snb_plane_formats;
num_formats = ARRAY_SIZE(snb_plane_formats);
modifiers = i9xx_plane_format_modifiers;
@@ -2534,6 +2875,7 @@ intel_sprite_plane_create(struct drm_i915_private *dev_priv,
plane->disable_plane = g4x_disable_plane;
plane->get_hw_state = g4x_plane_get_hw_state;
plane->check_plane = g4x_sprite_check;
+ plane->min_cdclk = g4x_sprite_min_cdclk;
modifiers = i9xx_plane_format_modifiers;
if (IS_GEN(dev_priv, 6)) {
diff --git a/drivers/gpu/drm/i915/display/intel_sprite.h b/drivers/gpu/drm/i915/display/intel_sprite.h
index 7dabc31710ae..aa0263027dc8 100644
--- a/drivers/gpu/drm/i915/display/intel_sprite.h
+++ b/drivers/gpu/drm/i915/display/intel_sprite.h
@@ -55,4 +55,11 @@ static inline bool icl_is_hdr_plane(struct drm_i915_private *dev_priv,
icl_hdr_plane_mask() & BIT(plane_id);
}
+int ivb_plane_min_cdclk(const struct intel_crtc_state *crtc_state,
+ const struct intel_plane_state *plane_state);
+int hsw_plane_min_cdclk(const struct intel_crtc_state *crtc_state,
+ const struct intel_plane_state *plane_state);
+int vlv_plane_min_cdclk(const struct intel_crtc_state *crtc_state,
+ const struct intel_plane_state *plane_state);
+
#endif /* __INTEL_SPRITE_H__ */
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index c0bbf7a60944..999ad3166cd1 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -910,6 +910,8 @@ struct intel_crtc_state {
struct intel_crtc_wm_state wm;
+ int min_cdclk[I915_MAX_PLANES];
+
u32 data_rate[I915_MAX_PLANES];
/* Gamma mode programmed on the pipe */
@@ -1046,6 +1048,8 @@ struct intel_plane {
bool (*get_hw_state)(struct intel_plane *plane, enum pipe *pipe);
int (*check_plane)(struct intel_crtc_state *crtc_state,
struct intel_plane_state *plane_state);
+ int (*min_cdclk)(const struct intel_crtc_state *crtc_state,
+ const struct intel_plane_state *plane_state);
};
struct intel_watermark_params {
--
2.21.0
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