[Intel-gfx] [PATCH v18 02/18] drm/i915/skl+: refactor WM calculation for NV12
Vidya Srinivas
vidya.srinivas at intel.com
Thu Mar 29 08:05:46 UTC 2018
From: Mahesh Kumar <mahesh1.kumar at intel.com>
Current code calculates DDB for planar formats in such a way that we
store DDB of plane-0 in plane 1 & vice-versa.
In order to make this clean this patch refactors WM/DDB calculation for
NV12 planar formats.
v2: Addressed review comments by Maarten
v3: Rebased and addressed review comments by Maarten
v4: Fixed a compilation issue of string replacement is_nv12 to
is_planar
v5: Added reviewed by from Juha-Pekka Heikkila
v6: Rebased the series
Reviewed-by: Juha-Pekka Heikkila <juhapekka.heikkila at gmail.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
Signed-off-by: Mahesh Kumar <mahesh1.kumar at intel.com>
Signed-off-by: Vidya Srinivas <vidya.srinivas at intel.com>
---
drivers/gpu/drm/i915/i915_drv.h | 5 +-
drivers/gpu/drm/i915/intel_drv.h | 1 +
drivers/gpu/drm/i915/intel_pm.c | 121 ++++++++++++++++++++-------------------
3 files changed, 66 insertions(+), 61 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 2afa7f9..3208152 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1182,8 +1182,9 @@ static inline bool skl_ddb_entry_equal(const struct skl_ddb_entry *e1,
}
struct skl_ddb_allocation {
- struct skl_ddb_entry plane[I915_MAX_PIPES][I915_MAX_PLANES]; /* packed/uv */
- struct skl_ddb_entry y_plane[I915_MAX_PIPES][I915_MAX_PLANES];
+ /* packed/y */
+ struct skl_ddb_entry plane[I915_MAX_PIPES][I915_MAX_PLANES];
+ struct skl_ddb_entry uv_plane[I915_MAX_PIPES][I915_MAX_PLANES];
};
struct skl_ddb_values {
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 7f77e6d..d7310fe 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -603,6 +603,7 @@ struct intel_pipe_wm {
struct skl_plane_wm {
struct skl_wm_level wm[8];
struct skl_wm_level trans_wm;
+ bool is_planar;
};
struct skl_pipe_wm {
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index d2963bc..c051cd3 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -4009,9 +4009,9 @@ int skl_check_pipe_max_pixel_rate(struct intel_crtc *intel_crtc,
static unsigned int
skl_plane_relative_data_rate(const struct intel_crtc_state *cstate,
const struct drm_plane_state *pstate,
- int y)
+ const int plane)
{
- struct intel_plane *plane = to_intel_plane(pstate->plane);
+ struct intel_plane *intel_plane = to_intel_plane(pstate->plane);
struct intel_plane_state *intel_pstate = to_intel_plane_state(pstate);
uint32_t data_rate;
uint32_t width = 0, height = 0;
@@ -4025,9 +4025,9 @@ skl_plane_relative_data_rate(const struct intel_crtc_state *cstate,
fb = pstate->fb;
format = fb->format->format;
- if (plane->id == PLANE_CURSOR)
+ if (intel_plane->id == PLANE_CURSOR)
return 0;
- if (y && format != DRM_FORMAT_NV12)
+ if (plane == 1 && format != DRM_FORMAT_NV12)
return 0;
/*
@@ -4038,19 +4038,14 @@ skl_plane_relative_data_rate(const struct intel_crtc_state *cstate,
width = drm_rect_width(&intel_pstate->base.src) >> 16;
height = drm_rect_height(&intel_pstate->base.src) >> 16;
- /* for planar format */
- if (format == DRM_FORMAT_NV12) {
- if (y) /* y-plane data rate */
- data_rate = width * height *
- fb->format->cpp[0];
- else /* uv-plane data rate */
- data_rate = (width / 2) * (height / 2) *
- fb->format->cpp[1];
- } else {
- /* for packed formats */
- data_rate = width * height * fb->format->cpp[0];
+ /* UV plane does 1/2 pixel sub-sampling */
+ if (plane == 1 && format == DRM_FORMAT_NV12) {
+ width /= 2;
+ height /= 2;
}
+ data_rate = width * height * fb->format->cpp[plane];
+
down_scale_amount = skl_plane_downscale_amount(cstate, intel_pstate);
return mul_round_up_u32_fixed16(data_rate, down_scale_amount);
@@ -4063,8 +4058,8 @@ skl_plane_relative_data_rate(const struct intel_crtc_state *cstate,
*/
static unsigned int
skl_get_total_relative_data_rate(struct intel_crtc_state *intel_cstate,
- unsigned *plane_data_rate,
- unsigned *plane_y_data_rate)
+ unsigned int *plane_data_rate,
+ unsigned int *uv_plane_data_rate)
{
struct drm_crtc_state *cstate = &intel_cstate->base;
struct drm_atomic_state *state = cstate->state;
@@ -4080,17 +4075,17 @@ skl_get_total_relative_data_rate(struct intel_crtc_state *intel_cstate,
enum plane_id plane_id = to_intel_plane(plane)->id;
unsigned int rate;
- /* packed/uv */
+ /* packed/y */
rate = skl_plane_relative_data_rate(intel_cstate,
pstate, 0);
plane_data_rate[plane_id] = rate;
total_data_rate += rate;
- /* y-plane */
+ /* uv-plane */
rate = skl_plane_relative_data_rate(intel_cstate,
pstate, 1);
- plane_y_data_rate[plane_id] = rate;
+ uv_plane_data_rate[plane_id] = rate;
total_data_rate += rate;
}
@@ -4099,8 +4094,7 @@ skl_get_total_relative_data_rate(struct intel_crtc_state *intel_cstate,
}
static uint16_t
-skl_ddb_min_alloc(const struct drm_plane_state *pstate,
- const int y)
+skl_ddb_min_alloc(const struct drm_plane_state *pstate, const int plane)
{
struct drm_framebuffer *fb = pstate->fb;
struct intel_plane_state *intel_pstate = to_intel_plane_state(pstate);
@@ -4111,8 +4105,8 @@ skl_ddb_min_alloc(const struct drm_plane_state *pstate,
if (WARN_ON(!fb))
return 0;
- /* For packed formats, no y-plane, return 0 */
- if (y && fb->format->format != DRM_FORMAT_NV12)
+ /* For packed formats, and uv-plane, return 0 */
+ if (plane == 1 && fb->format->format != DRM_FORMAT_NV12)
return 0;
/* For Non Y-tile return 8-blocks */
@@ -4131,15 +4125,12 @@ skl_ddb_min_alloc(const struct drm_plane_state *pstate,
src_h = drm_rect_height(&intel_pstate->base.src) >> 16;
/* Halve UV plane width and height for NV12 */
- if (fb->format->format == DRM_FORMAT_NV12 && !y) {
+ if (plane == 1) {
src_w /= 2;
src_h /= 2;
}
- if (fb->format->format == DRM_FORMAT_NV12 && !y)
- plane_bpp = fb->format->cpp[1];
- else
- plane_bpp = fb->format->cpp[0];
+ plane_bpp = fb->format->cpp[plane];
if (drm_rotation_90_or_270(pstate->rotation)) {
switch (plane_bpp) {
@@ -4167,7 +4158,7 @@ skl_ddb_min_alloc(const struct drm_plane_state *pstate,
static void
skl_ddb_calc_min(const struct intel_crtc_state *cstate, int num_active,
- uint16_t *minimum, uint16_t *y_minimum)
+ uint16_t *minimum, uint16_t *uv_minimum)
{
const struct drm_plane_state *pstate;
struct drm_plane *plane;
@@ -4182,7 +4173,7 @@ skl_ddb_calc_min(const struct intel_crtc_state *cstate, int num_active,
continue;
minimum[plane_id] = skl_ddb_min_alloc(pstate, 0);
- y_minimum[plane_id] = skl_ddb_min_alloc(pstate, 1);
+ uv_minimum[plane_id] = skl_ddb_min_alloc(pstate, 1);
}
minimum[PLANE_CURSOR] = skl_cursor_allocation(num_active);
@@ -4200,17 +4191,17 @@ skl_allocate_pipe_ddb(struct intel_crtc_state *cstate,
struct skl_ddb_entry *alloc = &cstate->wm.skl.ddb;
uint16_t alloc_size, start;
uint16_t minimum[I915_MAX_PLANES] = {};
- uint16_t y_minimum[I915_MAX_PLANES] = {};
+ uint16_t uv_minimum[I915_MAX_PLANES] = {};
unsigned int total_data_rate;
enum plane_id plane_id;
int num_active;
- unsigned plane_data_rate[I915_MAX_PLANES] = {};
- unsigned plane_y_data_rate[I915_MAX_PLANES] = {};
+ unsigned int plane_data_rate[I915_MAX_PLANES] = {};
+ unsigned int uv_plane_data_rate[I915_MAX_PLANES] = {};
uint16_t total_min_blocks = 0;
/* Clear the partitioning for disabled planes. */
memset(ddb->plane[pipe], 0, sizeof(ddb->plane[pipe]));
- memset(ddb->y_plane[pipe], 0, sizeof(ddb->y_plane[pipe]));
+ memset(ddb->uv_plane[pipe], 0, sizeof(ddb->uv_plane[pipe]));
if (WARN_ON(!state))
return 0;
@@ -4225,7 +4216,7 @@ skl_allocate_pipe_ddb(struct intel_crtc_state *cstate,
if (alloc_size == 0)
return 0;
- skl_ddb_calc_min(cstate, num_active, minimum, y_minimum);
+ skl_ddb_calc_min(cstate, num_active, minimum, uv_minimum);
/*
* 1. Allocate the mininum required blocks for each active plane
@@ -4235,7 +4226,7 @@ skl_allocate_pipe_ddb(struct intel_crtc_state *cstate,
for_each_plane_id_on_crtc(intel_crtc, plane_id) {
total_min_blocks += minimum[plane_id];
- total_min_blocks += y_minimum[plane_id];
+ total_min_blocks += uv_minimum[plane_id];
}
if (total_min_blocks > alloc_size) {
@@ -4257,14 +4248,14 @@ skl_allocate_pipe_ddb(struct intel_crtc_state *cstate,
*/
total_data_rate = skl_get_total_relative_data_rate(cstate,
plane_data_rate,
- plane_y_data_rate);
+ uv_plane_data_rate);
if (total_data_rate == 0)
return 0;
start = alloc->start;
for_each_plane_id_on_crtc(intel_crtc, plane_id) {
- unsigned int data_rate, y_data_rate;
- uint16_t plane_blocks, y_plane_blocks = 0;
+ unsigned int data_rate, uv_data_rate;
+ uint16_t plane_blocks, uv_plane_blocks;
if (plane_id == PLANE_CURSOR)
continue;
@@ -4288,21 +4279,20 @@ skl_allocate_pipe_ddb(struct intel_crtc_state *cstate,
start += plane_blocks;
- /*
- * allocation for y_plane part of planar format:
- */
- y_data_rate = plane_y_data_rate[plane_id];
+ /* Allocate DDB for UV plane for planar format/NV12 */
+ uv_data_rate = uv_plane_data_rate[plane_id];
- y_plane_blocks = y_minimum[plane_id];
- y_plane_blocks += div_u64((uint64_t)alloc_size * y_data_rate,
- total_data_rate);
+ uv_plane_blocks = uv_minimum[plane_id];
+ uv_plane_blocks += div_u64((uint64_t)alloc_size * uv_data_rate,
+ total_data_rate);
- if (y_data_rate) {
- ddb->y_plane[pipe][plane_id].start = start;
- ddb->y_plane[pipe][plane_id].end = start + y_plane_blocks;
+ if (uv_data_rate) {
+ ddb->uv_plane[pipe][plane_id].start = start;
+ ddb->uv_plane[pipe][plane_id].end =
+ start + uv_plane_blocks;
}
- start += y_plane_blocks;
+ start += uv_plane_blocks;
}
return 0;
@@ -4430,8 +4420,7 @@ skl_compute_plane_wm_params(const struct drm_i915_private *dev_priv,
wp->width = drm_rect_width(&intel_pstate->base.src) >> 16;
}
- wp->cpp = (fb->format->format == DRM_FORMAT_NV12) ? fb->format->cpp[1] :
- fb->format->cpp[0];
+ wp->cpp = fb->format->cpp[0];
wp->plane_pixel_rate = skl_adjusted_plane_pixel_rate(cstate,
intel_pstate);
@@ -4660,6 +4649,9 @@ skl_compute_wm_levels(const struct drm_i915_private *dev_priv,
return ret;
}
+ if (intel_pstate->base.fb->format->format == DRM_FORMAT_NV12)
+ wm->is_planar = true;
+
return 0;
}
@@ -4833,10 +4825,21 @@ static void skl_write_plane_wm(struct intel_crtc *intel_crtc,
skl_ddb_entry_write(dev_priv, PLANE_BUF_CFG(pipe, plane_id),
&ddb->plane[pipe][plane_id]);
- if (INTEL_GEN(dev_priv) < 11)
+ if (INTEL_GEN(dev_priv) >= 11)
+ return skl_ddb_entry_write(dev_priv,
+ PLANE_BUF_CFG(pipe, plane_id),
+ &ddb->plane[pipe][plane_id]);
+ if (wm->is_planar) {
+ skl_ddb_entry_write(dev_priv, PLANE_BUF_CFG(pipe, plane_id),
+ &ddb->uv_plane[pipe][plane_id]);
skl_ddb_entry_write(dev_priv,
PLANE_NV12_BUF_CFG(pipe, plane_id),
- &ddb->y_plane[pipe][plane_id]);
+ &ddb->plane[pipe][plane_id]);
+ } else {
+ skl_ddb_entry_write(dev_priv, PLANE_BUF_CFG(pipe, plane_id),
+ &ddb->plane[pipe][plane_id]);
+ I915_WRITE(PLANE_NV12_BUF_CFG(pipe, plane_id), 0x0);
+ }
}
static void skl_write_cursor_wm(struct intel_crtc *intel_crtc,
@@ -4951,8 +4954,8 @@ skl_ddb_add_affected_planes(struct intel_crtc_state *cstate)
if (skl_ddb_entry_equal(&cur_ddb->plane[pipe][plane_id],
&new_ddb->plane[pipe][plane_id]) &&
- skl_ddb_entry_equal(&cur_ddb->y_plane[pipe][plane_id],
- &new_ddb->y_plane[pipe][plane_id]))
+ skl_ddb_entry_equal(&cur_ddb->uv_plane[pipe][plane_id],
+ &new_ddb->uv_plane[pipe][plane_id]))
continue;
plane_state = drm_atomic_get_plane_state(state, plane);
@@ -5046,8 +5049,8 @@ skl_copy_ddb_for_pipe(struct skl_ddb_values *dst,
struct skl_ddb_values *src,
enum pipe pipe)
{
- memcpy(dst->ddb.y_plane[pipe], src->ddb.y_plane[pipe],
- sizeof(dst->ddb.y_plane[pipe]));
+ memcpy(dst->ddb.uv_plane[pipe], src->ddb.uv_plane[pipe],
+ sizeof(dst->ddb.uv_plane[pipe]));
memcpy(dst->ddb.plane[pipe], src->ddb.plane[pipe],
sizeof(dst->ddb.plane[pipe]));
}
--
2.7.4
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