[PATCH v8 2/3] drm/msm/dpu: allow using two SSPP blocks for a single plane
Dmitry Baryshkov
dmitry.baryshkov at linaro.org
Sun Dec 15 12:40:17 UTC 2024
Virtual wide planes give high amount of flexibility, but it is not
always enough:
In parallel multirect case only the half of the usual width is supported
for tiled formats. Thus the whole width of two tiled multirect
rectangles can not be greater than max_linewidth, which is not enough
for some platforms/compositors.
Another example is as simple as wide YUV plane. YUV planes can not use
multirect, so currently they are limited to max_linewidth too.
Now that the planes are fully virtualized, add support for allocating
two SSPP blocks to drive a single DRM plane. This fixes both mentioned
cases and allows all planes to go up to 2*max_linewidth (at the cost of
making some of the planes unavailable to the user).
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov at linaro.org>
---
drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c | 144 ++++++++++++++++++++----------
1 file changed, 98 insertions(+), 46 deletions(-)
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
index 309a8cdaafcf3dacd1c7ba4e0cddb7f3f56423c0..098abc2c0003cde90ce6219c97ee18fa055a92a5 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
@@ -20,7 +20,6 @@
#include "msm_drv.h"
#include "msm_mdss.h"
#include "dpu_kms.h"
-#include "dpu_formats.h"
#include "dpu_hw_sspp.h"
#include "dpu_hw_util.h"
#include "dpu_trace.h"
@@ -888,6 +887,32 @@ static int dpu_plane_atomic_check_nosspp(struct drm_plane *plane,
return 0;
}
+static int dpu_plane_is_multirect_parallel_capable(struct dpu_hw_sspp *sspp,
+ struct dpu_sw_pipe_cfg *pipe_cfg,
+ const struct msm_format *fmt,
+ uint32_t max_linewidth)
+{
+ if (drm_rect_width(&pipe_cfg->src_rect) != drm_rect_width(&pipe_cfg->dst_rect) ||
+ drm_rect_height(&pipe_cfg->src_rect) != drm_rect_height(&pipe_cfg->dst_rect))
+ return false;
+
+ if (pipe_cfg->rotation & DRM_MODE_ROTATE_90)
+ return false;
+
+ if (MSM_FORMAT_IS_YUV(fmt))
+ return false;
+
+ if (MSM_FORMAT_IS_UBWC(fmt) &&
+ drm_rect_width(&pipe_cfg->src_rect) > max_linewidth / 2)
+ return false;
+
+ if (!test_bit(DPU_SSPP_SMART_DMA_V1, &sspp->cap->features) &&
+ !test_bit(DPU_SSPP_SMART_DMA_V2, &sspp->cap->features))
+ return false;
+
+ return true;
+}
+
static int dpu_plane_atomic_check_sspp(struct drm_plane *plane,
struct drm_atomic_state *state,
const struct drm_crtc_state *crtc_state)
@@ -901,7 +926,6 @@ static int dpu_plane_atomic_check_sspp(struct drm_plane *plane,
const struct msm_format *fmt;
struct dpu_sw_pipe_cfg *pipe_cfg = &pstate->pipe_cfg;
struct dpu_sw_pipe_cfg *r_pipe_cfg = &pstate->r_pipe_cfg;
- uint32_t max_linewidth;
uint32_t supported_rotations;
const struct dpu_sspp_cfg *pipe_hw_caps;
const struct dpu_sspp_sub_blks *sblk;
@@ -923,8 +947,6 @@ static int dpu_plane_atomic_check_sspp(struct drm_plane *plane,
fmt = msm_framebuffer_format(new_plane_state->fb);
- max_linewidth = pdpu->catalog->caps->max_linewidth;
-
supported_rotations = DRM_MODE_REFLECT_MASK | DRM_MODE_ROTATE_0;
if (pipe_hw_caps->features & BIT(DPU_SSPP_INLINE_ROTATION))
@@ -940,48 +962,43 @@ static int dpu_plane_atomic_check_sspp(struct drm_plane *plane,
return ret;
if (drm_rect_width(&r_pipe_cfg->src_rect) != 0) {
- /*
- * In parallel multirect case only the half of the usual width
- * is supported for tiled formats. If we are here, we know that
- * full width is more than max_linewidth, thus each rect is
- * wider than allowed.
- */
- if (MSM_FORMAT_IS_UBWC(fmt) &&
- drm_rect_width(&pipe_cfg->src_rect) > max_linewidth) {
- DPU_DEBUG_PLANE(pdpu, "invalid src " DRM_RECT_FMT " line:%u, tiled format\n",
- DRM_RECT_ARG(&pipe_cfg->src_rect), max_linewidth);
- return -E2BIG;
- }
+ ret = dpu_plane_atomic_check_pipe(pdpu, r_pipe, r_pipe_cfg, fmt,
+ &crtc_state->adjusted_mode);
+ if (ret)
+ return ret;
+ }
- if (drm_rect_width(&pipe_cfg->src_rect) != drm_rect_width(&pipe_cfg->dst_rect) ||
- drm_rect_height(&pipe_cfg->src_rect) != drm_rect_height(&pipe_cfg->dst_rect) ||
- (!test_bit(DPU_SSPP_SMART_DMA_V1, &pipe->sspp->cap->features) &&
- !test_bit(DPU_SSPP_SMART_DMA_V2, &pipe->sspp->cap->features)) ||
- pipe_cfg->rotation & DRM_MODE_ROTATE_90 ||
- MSM_FORMAT_IS_YUV(fmt)) {
- DPU_DEBUG_PLANE(pdpu, "invalid src " DRM_RECT_FMT " line:%u, can't use split source\n",
- DRM_RECT_ARG(&pipe_cfg->src_rect), max_linewidth);
- return -E2BIG;
- }
+ return 0;
+}
+
+static bool dpu_plane_try_multirect_parallel(struct dpu_sw_pipe *pipe, struct dpu_sw_pipe_cfg *pipe_cfg,
+ struct dpu_sw_pipe *r_pipe, struct dpu_sw_pipe_cfg *r_pipe_cfg,
+ struct dpu_hw_sspp *sspp, const struct msm_format *fmt,
+ uint32_t max_linewidth)
+{
+ r_pipe->sspp = NULL;
+
+ pipe->multirect_index = DPU_SSPP_RECT_SOLO;
+ pipe->multirect_mode = DPU_SSPP_MULTIRECT_NONE;
+
+ r_pipe->multirect_index = DPU_SSPP_RECT_SOLO;
+ r_pipe->multirect_mode = DPU_SSPP_MULTIRECT_NONE;
+
+ if (drm_rect_width(&r_pipe_cfg->src_rect) != 0) {
+ if (!dpu_plane_is_multirect_parallel_capable(pipe->sspp, pipe_cfg, fmt, max_linewidth) ||
+ !dpu_plane_is_multirect_parallel_capable(pipe->sspp, r_pipe_cfg, fmt, max_linewidth))
+ return false;
+
+ r_pipe->sspp = pipe->sspp;
- /*
- * Use multirect for wide plane. We do not support dynamic
- * assignment of SSPPs, so we know the configuration.
- */
pipe->multirect_index = DPU_SSPP_RECT_0;
pipe->multirect_mode = DPU_SSPP_MULTIRECT_PARALLEL;
- r_pipe->sspp = pipe->sspp;
r_pipe->multirect_index = DPU_SSPP_RECT_1;
r_pipe->multirect_mode = DPU_SSPP_MULTIRECT_PARALLEL;
-
- ret = dpu_plane_atomic_check_pipe(pdpu, r_pipe, r_pipe_cfg, fmt,
- &crtc_state->adjusted_mode);
- if (ret)
- return ret;
}
- return 0;
+ return true;
}
static int dpu_plane_atomic_check(struct drm_plane *plane,
@@ -995,16 +1012,16 @@ static int dpu_plane_atomic_check(struct drm_plane *plane,
struct dpu_kms *dpu_kms = _dpu_plane_get_kms(plane);
struct dpu_sw_pipe *pipe = &pstate->pipe;
struct dpu_sw_pipe *r_pipe = &pstate->r_pipe;
+ struct dpu_sw_pipe_cfg *pipe_cfg = &pstate->pipe_cfg;
+ struct dpu_sw_pipe_cfg *r_pipe_cfg = &pstate->r_pipe_cfg;
const struct drm_crtc_state *crtc_state = NULL;
+ uint32_t max_linewidth = dpu_kms->catalog->caps->max_linewidth;
if (new_plane_state->crtc)
crtc_state = drm_atomic_get_new_crtc_state(state,
new_plane_state->crtc);
- if (pdpu->pipe != SSPP_NONE) {
- pipe->sspp = dpu_rm_get_sspp(&dpu_kms->rm, pdpu->pipe);
- r_pipe->sspp = NULL;
- }
+ pipe->sspp = dpu_rm_get_sspp(&dpu_kms->rm, pdpu->pipe);
if (!pipe->sspp)
return -EINVAL;
@@ -1016,10 +1033,17 @@ static int dpu_plane_atomic_check(struct drm_plane *plane,
if (!new_plane_state->visible)
return 0;
- pipe->multirect_index = DPU_SSPP_RECT_SOLO;
- pipe->multirect_mode = DPU_SSPP_MULTIRECT_NONE;
- r_pipe->multirect_index = DPU_SSPP_RECT_SOLO;
- r_pipe->multirect_mode = DPU_SSPP_MULTIRECT_NONE;
+ if (!dpu_plane_try_multirect_parallel(pipe, pipe_cfg, r_pipe, r_pipe_cfg,
+ pipe->sspp,
+ msm_framebuffer_format(new_plane_state->fb),
+ max_linewidth)) {
+ DPU_DEBUG_PLANE(pdpu, "invalid " DRM_RECT_FMT " /" DRM_RECT_FMT
+ " max_line:%u, can't use split source\n",
+ DRM_RECT_ARG(&pipe_cfg->src_rect),
+ DRM_RECT_ARG(&r_pipe_cfg->src_rect),
+ max_linewidth);
+ return -E2BIG;
+ }
return dpu_plane_atomic_check_sspp(plane, state, crtc_state);
}
@@ -1054,8 +1078,16 @@ static int dpu_plane_virtual_atomic_check(struct drm_plane *plane,
return 0;
}
- /* force resource reallocation if the format of FB has changed */
+ /*
+ * Force resource reallocation if the format of FB or src/dst have
+ * changed. We might need to allocate different SSPP or SSPPs for this
+ * plane than the one used previously.
+ */
if (!old_plane_state || !old_plane_state->fb ||
+ old_plane_state->src_w != plane_state->src_w ||
+ old_plane_state->src_h != plane_state->src_h ||
+ old_plane_state->src_w != plane_state->src_w ||
+ old_plane_state->crtc_h != plane_state->crtc_h ||
msm_framebuffer_format(old_plane_state->fb) !=
msm_framebuffer_format(plane_state->fb))
crtc_state->planes_changed = true;
@@ -1075,6 +1107,8 @@ static int dpu_plane_virtual_assign_resources(struct drm_crtc *crtc,
struct dpu_plane_state *pstate;
struct dpu_sw_pipe *pipe;
struct dpu_sw_pipe *r_pipe;
+ struct dpu_sw_pipe_cfg *pipe_cfg;
+ struct dpu_sw_pipe_cfg *r_pipe_cfg;
const struct msm_format *fmt;
if (plane_state->crtc)
@@ -1084,6 +1118,8 @@ static int dpu_plane_virtual_assign_resources(struct drm_crtc *crtc,
pstate = to_dpu_plane_state(plane_state);
pipe = &pstate->pipe;
r_pipe = &pstate->r_pipe;
+ pipe_cfg = &pstate->pipe_cfg;
+ r_pipe_cfg = &pstate->r_pipe_cfg;
pipe->sspp = NULL;
r_pipe->sspp = NULL;
@@ -1102,6 +1138,22 @@ static int dpu_plane_virtual_assign_resources(struct drm_crtc *crtc,
if (!pipe->sspp)
return -ENODEV;
+ if (!dpu_plane_try_multirect_parallel(pipe, pipe_cfg, r_pipe, r_pipe_cfg,
+ pipe->sspp,
+ msm_framebuffer_format(plane_state->fb),
+ dpu_kms->catalog->caps->max_linewidth)) {
+ /* multirect is not possible, use two SSPP blocks */
+ r_pipe->sspp = dpu_rm_reserve_sspp(&dpu_kms->rm, global_state, crtc, &reqs);
+ if (!r_pipe->sspp)
+ return -ENODEV;
+
+ pipe->multirect_index = DPU_SSPP_RECT_SOLO;
+ pipe->multirect_mode = DPU_SSPP_MULTIRECT_NONE;
+
+ r_pipe->multirect_index = DPU_SSPP_RECT_SOLO;
+ r_pipe->multirect_mode = DPU_SSPP_MULTIRECT_NONE;
+ }
+
return dpu_plane_atomic_check_sspp(plane, state, crtc_state);
}
--
2.39.5
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