On 2/26/2025 4:31 AM, Jun Nie wrote:
Currently, SSPPs are assigned to a maximum of two pipes. However,
quad-pipe usage scenarios require four pipes and involve configuring
two stages. In quad-pipe case, the first two pipes share a set of
mixer configurations and enable multi-rect mode when certain
conditions are met. The same applies to the subsequent two pipes.
Assign SSPPs to the pipes in each stage using a unified method and
to loop the stages accordingly.
Signed-off-by: Jun Nie <jun....@linaro.org>
---
drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c | 11 +++++
drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.h | 2 +
drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c | 71 ++++++++++++++++++++-----------
3 files changed, 58 insertions(+), 26 deletions(-)
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
index
0a053c5888262d863a1e549e14e3aa40a80c3f06..9405453cbf5d852e72a5f954cd8c6aed3a222723
100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
@@ -1366,6 +1366,17 @@ int dpu_crtc_vblank(struct drm_crtc *crtc, bool en)
return 0;
}
+/**
+ * dpu_crtc_get_num_lm - Get mixer number in this CRTC pipeline
+ * @state: Pointer to drm crtc state object
+ */
+unsigned int dpu_crtc_get_num_lm(const struct drm_crtc_state *state)
+{
+ struct dpu_crtc_state *cstate = to_dpu_crtc_state(state);
+
+ return cstate->num_mixers;
+}
+
#ifdef CONFIG_DEBUG_FS
static int _dpu_debugfs_status_show(struct seq_file *s, void *data)
{
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.h
b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.h
index
0b148f3ce0d7af80ec4ffcd31d8632a5815b16f1..b14bab2754635953da402d09e11a43b9b4cf4153
100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.h
@@ -264,4 +264,6 @@ static inline enum dpu_crtc_client_type
dpu_crtc_get_client_type(
void dpu_crtc_frame_event_cb(struct drm_crtc *crtc, u32 event);
+unsigned int dpu_crtc_get_num_lm(const struct drm_crtc_state *state);
+
#endif /* _DPU_CRTC_H_ */
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
index
d67f2ad20b4754ca4bcb759a65a39628b7236b0f..d1d6c91ed0f8e1c62b757ca42546fbc421609f72
100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
@@ -1112,11 +1112,10 @@ static int dpu_plane_virtual_assign_resources(struct
drm_crtc *crtc,
struct dpu_rm_sspp_requirements reqs;
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;
+ struct dpu_plane *pdpu = to_dpu_plane(plane);
const struct msm_format *fmt;
- int i;
+ int i, num_lm, stage_id, num_stages;
if (plane_state->crtc)
crtc_state = drm_atomic_get_new_crtc_state(state,
@@ -1124,11 +1123,6 @@ static int dpu_plane_virtual_assign_resources(struct
drm_crtc *crtc,
pstate = to_dpu_plane_state(plane_state);
- pipe = &pstate->pipe[0];
- r_pipe = &pstate->pipe[1];
- pipe_cfg = &pstate->pipe_cfg[0];
- r_pipe_cfg = &pstate->pipe_cfg[1];
-
for (i = 0; i < PIPES_PER_PLANE; i++)
pstate->pipe[i].sspp = NULL;
@@ -1142,24 +1136,49 @@ static int dpu_plane_virtual_assign_resources(struct drm_crtc *crtc,
reqs.rot90 = drm_rotation_90_or_270(plane_state->rotation);
- pipe->sspp = dpu_rm_reserve_sspp(&dpu_kms->rm, global_state, crtc, &reqs);
- 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;
+ num_lm = dpu_crtc_get_num_lm(crtc_state);
Hi Jun,
Just wondering, why not use dpu_rm_get_assigned_resources() here instead
of adding a new *_get_num_lm() API?
Thanks,
Jessica Zhang
+ num_stages = (num_lm + 1) / 2;
+ for (stage_id = 0; stage_id < num_stages; stage_id++) {
+ for (i = stage_id * PIPES_PER_STAGE; i < (stage_id + 1) *
PIPES_PER_STAGE; i++) {
+ struct dpu_sw_pipe *r_pipe;
+ struct dpu_sw_pipe_cfg *r_pipe_cfg;
+
+ pipe = &pstate->pipe[i];
+ pipe_cfg = &pstate->pipe_cfg[i];
+
+ if (drm_rect_width(&pipe_cfg->src_rect) == 0)
+ break;
+
+ pipe->sspp = dpu_rm_reserve_sspp(&dpu_kms->rm,
global_state, crtc, &reqs);
+ if (!pipe->sspp)
+ return -ENODEV;
+
+ /* use solo SSPP for the 2nd pipe in pipe pair */
+ if (i % PIPES_PER_STAGE != 0)
+ goto use_solo_sspp;
+
+ /*
+ * Check multi-rect opportunity for the 2nd pipe in the
+ * pair. SSPP multi-rect mode cross mixer pairs is not
+ * supported.
+ */
+ r_pipe = &pstate->pipe[i + 1];
+ r_pipe_cfg = &pstate->pipe_cfg[i + 1];
+
+ if (drm_rect_width(&r_pipe_cfg->src_rect) != 0 &&
+ 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)) {
+ i++;
+ continue;
+ }
+use_solo_sspp:
+ pipe->multirect_index = DPU_SSPP_RECT_SOLO;
+ pipe->multirect_mode = DPU_SSPP_MULTIRECT_NONE;
+ DPU_DEBUG_PLANE(pdpu, "allocating sspp_%d for pipe
%d.\n",
+ pipe->sspp->idx - SSPP_NONE, i);
+ }
}
return dpu_plane_atomic_check_sspp(plane, state, crtc_state);
--
2.34.1
