On Tue, Oct 29, 2024 at 03:07:30PM -0700, Abhinav Kumar wrote:
>
>
> On 10/24/2024 5:20 PM, Dmitry Baryshkov wrote:
> > 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.barysh...@linaro.org>
> > ---
> > drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c | 163
> > ++++++++++++++++++++++--------
> > 1 file changed, 119 insertions(+), 44 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
> > b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
> > index 125db3803cf5..ad6cc469f475 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 +887,28 @@ static int dpu_plane_atomic_check_nosspp(struct
> > drm_plane *plane,
> > return 0;
> > }
> > +static int dpu_plane_is_multirect_parallel_capable(struct dpu_sw_pipe
> > *pipe,
> > + 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;
> > +
> > + return true;
> > +}
>
> Dont we also need to check for
>
> if (!test_bit(DPU_SSPP_SMART_DMA_V1, &pipe->sspp->cap->features) &&
> !test_bit(DPU_SSPP_SMART_DMA_V2,
> &pipe->sspp->cap->features))?
> return false;
In the patch I was checking that after a call to this function, but
maybe you are right. Especially since I was checking only the pipe, not
the r_pipe.
>
> > +
> > 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 +922,6 @@ 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 +943,6 @@ 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))
> > @@ -940,41 +958,6 @@ 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;
> > - }
> > -
> > - 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;
> > - }
> > -
> > - /*
> > - * 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)
> > @@ -995,16 +978,16 @@ 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;
> > 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);
> > + r_pipe->sspp = NULL;
> > if (!pipe->sspp)
> > return -EINVAL;
> > @@ -1021,6 +1004,49 @@ static int dpu_plane_atomic_check(struct drm_plane
> > *plane,
> > 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) {
> > + uint32_t max_linewidth = dpu_kms->catalog->caps->max_linewidth;
> > + const struct msm_format *fmt;
> > +
> > + fmt = msm_framebuffer_format(new_plane_state->fb);
> > +
> > + /*
> > + * 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;
> > + }
> > +
> > + 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;
> > + }
>
> Dont the above two conditions translate to
> !dpu_plane_is_multirect_parallel_capable()?
Good idea, I'll change that.
>
> I think once we have a unified plane atomic check and not a separate one for
> virtual planes (we had to add one to support the modparam), some duplication
> will go away but till then I think this is the best we can do.
>
>
> > +
> > + /*
> > + * Use multirect for wide plane. We do not support dynamic
> > + * assignment of SSPPs, so we know the configuration.
> > + */
> > + r_pipe->sspp = pipe->sspp;
> > +
> > + pipe->multirect_index = DPU_SSPP_RECT_0;
> > + pipe->multirect_mode = DPU_SSPP_MULTIRECT_PARALLEL;
> > +
> > + r_pipe->multirect_index = DPU_SSPP_RECT_1;
> > + r_pipe->multirect_mode = DPU_SSPP_MULTIRECT_PARALLEL;
> > + }
> > +
> > return dpu_plane_atomic_check_sspp(plane, state, crtc_state);
> > }
> > @@ -1054,8 +1080,16 @@ 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;
> > @@ -1075,7 +1109,10 @@ 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;
> > + uint32_t max_linewidth;
> > if (plane_state->crtc)
> > crtc_state = drm_atomic_get_new_crtc_state(state,
> > @@ -1084,6 +1121,8 @@ 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;
> > @@ -1098,10 +1137,46 @@ static int
> > dpu_plane_virtual_assign_resources(struct drm_crtc *crtc,
> > reqs.rot90 = drm_rotation_90_or_270(plane_state->rotation);
> > + max_linewidth = dpu_kms->catalog->caps->max_linewidth;
> > +
> > pipe->sspp = dpu_rm_reserve_sspp(&dpu_kms->rm, global_state, crtc,
> > &reqs);
> > if (!pipe->sspp)
> > return -ENODEV;
> > + if (drm_rect_width(&r_pipe_cfg->src_rect) == 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;
> > +
> > + r_pipe->sspp = NULL;
> > + } else {
> > + if (dpu_plane_is_multirect_parallel_capable(pipe, pipe_cfg,
> > fmt, max_linewidth) &&
> > + dpu_plane_is_multirect_parallel_capable(r_pipe, r_pipe_cfg,
> > fmt, max_linewidth) &&
> > + (test_bit(DPU_SSPP_SMART_DMA_V1,
> > &pipe->sspp->cap->features) ||
> > + test_bit(DPU_SSPP_SMART_DMA_V2,
> > &pipe->sspp->cap->features))) {
> > + r_pipe->sspp = pipe->sspp;
> > +
> > + pipe->multirect_index = DPU_SSPP_RECT_0;
> > + pipe->multirect_mode = DPU_SSPP_MULTIRECT_PARALLEL;
> > +
> > + r_pipe->multirect_index = DPU_SSPP_RECT_1;
> > + r_pipe->multirect_mode = DPU_SSPP_MULTIRECT_PARALLEL;
> > + } else {
> > + /* 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);
> > }
> >
--
With best wishes
Dmitry
