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Message-ID: <CAA8EJpr_wCAO5fw+ZbbuPUtnJFms+Q-X02ekWEGCnvuxcHKbqQ@mail.gmail.com>
Date: Wed, 28 Aug 2024 21:59:04 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Abhinav Kumar <quic_abhinavk@...cinc.com>
Cc: Rob Clark <robdclark@...il.com>, Sean Paul <sean@...rly.run>,
Marijn Suijten <marijn.suijten@...ainline.org>, David Airlie <airlied@...il.com>,
Daniel Vetter <daniel@...ll.ch>, linux-arm-msm@...r.kernel.org,
dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 08/12] drm/msm/dpu: split dpu_plane_atomic_check()
On Wed, 28 Aug 2024 at 21:27, Abhinav Kumar <quic_abhinavk@...cinc.com> wrote:
>
>
>
> On 6/26/2024 2:46 PM, Dmitry Baryshkov wrote:
> > Split dpu_plane_atomic_check() function into two pieces:
> >
> > dpu_plane_atomic_check_nopipe() performing generic checks on the pstate,
> > without touching the associated pipe,
> >
> > and
> >
> > dpu_plane_atomic_check_pipes(), which takes into account used pipes.
> >
> > Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> > ---
> > drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c | 178 +++++++++++++++++++-----------
> > 1 file changed, 112 insertions(+), 66 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
> > index 115c1bd77bdd..9b9fe28052ad 100644
> > --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
> > +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
> > @@ -788,49 +788,22 @@ static int dpu_plane_atomic_check_pipe(struct dpu_plane *pdpu,
> > #define MAX_UPSCALE_RATIO 20
> > #define MAX_DOWNSCALE_RATIO 4
> >
> > -static int dpu_plane_atomic_check(struct drm_plane *plane,
> > - struct drm_atomic_state *state)
> > +static int dpu_plane_atomic_check_nopipe(struct drm_plane *plane,
> > + struct drm_plane_state *new_plane_state,
> > + const struct drm_crtc_state *crtc_state)
> > {
> > - struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
> > - plane);
> > int ret = 0, min_scale, max_scale;
> > struct dpu_plane *pdpu = to_dpu_plane(plane);
> > struct dpu_kms *kms = _dpu_plane_get_kms(&pdpu->base);
> > u64 max_mdp_clk_rate = kms->perf.max_core_clk_rate;
> > struct dpu_plane_state *pstate = to_dpu_plane_state(new_plane_state);
> > - struct dpu_sw_pipe *pipe = &pstate->pipe;
> > - struct dpu_sw_pipe *r_pipe = &pstate->r_pipe;
> > - const struct drm_crtc_state *crtc_state = NULL;
> > - 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;
> > struct drm_rect fb_rect = { 0 };
> > uint32_t max_linewidth;
> > - unsigned int rotation;
> > - uint32_t supported_rotations;
> > - const struct dpu_sspp_cfg *pipe_hw_caps;
> > - const struct dpu_sspp_sub_blks *sblk;
> > -
> > - if (new_plane_state->crtc)
> > - crtc_state = drm_atomic_get_new_crtc_state(state,
> > - new_plane_state->crtc);
> > -
> > - pipe->sspp = dpu_rm_get_sspp(&kms->rm, pdpu->pipe);
> > - r_pipe->sspp = NULL;
> >
> > - if (!pipe->sspp)
> > - return -EINVAL;
> > -
> > - pipe_hw_caps = pipe->sspp->cap;
> > - sblk = pipe->sspp->cap->sblk;
> > -
> > - if (sblk->scaler_blk.len) {
> > - min_scale = FRAC_16_16(1, MAX_UPSCALE_RATIO);
> > - max_scale = MAX_DOWNSCALE_RATIO << 16;
> > - } else {
> > - min_scale = DRM_PLANE_NO_SCALING;
> > - max_scale = DRM_PLANE_NO_SCALING;
> > - }
> > + min_scale = FRAC_16_16(1, MAX_UPSCALE_RATIO);
> > + max_scale = MAX_DOWNSCALE_RATIO << 16;
> >
> > ret = drm_atomic_helper_check_plane_state(new_plane_state, crtc_state,
> > min_scale,
> > @@ -843,11 +816,6 @@ 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;
> > -
> > pstate->stage = DPU_STAGE_0 + pstate->base.normalized_zpos;
> > if (pstate->stage >= pdpu->catalog->caps->max_mixer_blendstages) {
> > DPU_ERROR("> %d plane stages assigned\n",
> > @@ -871,8 +839,6 @@ static int dpu_plane_atomic_check(struct drm_plane *plane,
> > return -E2BIG;
> > }
> >
> > - fmt = msm_framebuffer_format(new_plane_state->fb);
> > -
> > max_linewidth = pdpu->catalog->caps->max_linewidth;
> >
> > drm_rect_rotate(&pipe_cfg->src_rect,
> > @@ -881,6 +847,78 @@ static int dpu_plane_atomic_check(struct drm_plane *plane,
> >
> > if ((drm_rect_width(&pipe_cfg->src_rect) > max_linewidth) ||
> > _dpu_plane_calc_clk(&crtc_state->adjusted_mode, pipe_cfg) > max_mdp_clk_rate) {
> > + if (drm_rect_width(&pipe_cfg->src_rect) > 2 * max_linewidth) {
> > + DPU_DEBUG_PLANE(pdpu, "invalid src " DRM_RECT_FMT " line:%u\n",
> > + DRM_RECT_ARG(&pipe_cfg->src_rect), max_linewidth);
> > + return -E2BIG;
> > + }
> > +
> > + *r_pipe_cfg = *pipe_cfg;
> > + pipe_cfg->src_rect.x2 = (pipe_cfg->src_rect.x1 + pipe_cfg->src_rect.x2) >> 1;
> > + pipe_cfg->dst_rect.x2 = (pipe_cfg->dst_rect.x1 + pipe_cfg->dst_rect.x2) >> 1;
> > + r_pipe_cfg->src_rect.x1 = pipe_cfg->src_rect.x2;
> > + r_pipe_cfg->dst_rect.x1 = pipe_cfg->dst_rect.x2;
> > + } else {
> > + memset(r_pipe_cfg, 0, sizeof(*r_pipe_cfg));
> > + }
> > +
>
> This is the part I am not able to fully understand. Assignment of
> r_pipe_cfg is also pipe related so why should that move to
> dpu_plane_atomic_check_nopipe(). It should be part of
> dpu_plane_atomic_check_pipe().
Because it happens before possible pipe / rectangle allocation. These
values are further used to assign resources.
>
> > + drm_rect_rotate_inv(&pipe_cfg->src_rect,
> > + new_plane_state->fb->width, new_plane_state->fb->height,
> > + new_plane_state->rotation);
> > + if (r_pipe_cfg->src_rect.x1 != 0)
> > + drm_rect_rotate_inv(&r_pipe_cfg->src_rect,
> > + new_plane_state->fb->width, new_plane_state->fb->height,
> > + new_plane_state->rotation);
> > +
> > + pstate->needs_qos_remap = drm_atomic_crtc_needs_modeset(crtc_state);
> > +
> > + return 0;
> > +}
> > +
> > +static int dpu_plane_atomic_check_pipes(struct drm_plane *plane,
> > + struct drm_atomic_state *state,
> > + const struct drm_crtc_state *crtc_state)
> > +{
> > + struct drm_plane_state *new_plane_state =
> > + drm_atomic_get_new_plane_state(state, plane);
> > + struct dpu_plane *pdpu = to_dpu_plane(plane);
> > + struct dpu_plane_state *pstate = to_dpu_plane_state(new_plane_state);
> > + struct dpu_sw_pipe *pipe = &pstate->pipe;
> > + struct dpu_sw_pipe *r_pipe = &pstate->r_pipe;
> > + 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;
> > + unsigned int rotation;
> > + uint32_t supported_rotations;
> > + const struct dpu_sspp_cfg *pipe_hw_caps;
> > + const struct dpu_sspp_sub_blks *sblk;
> > + int ret = 0;
> > +
> > + pipe_hw_caps = pipe->sspp->cap;
> > + sblk = pipe->sspp->cap->sblk;
> > +
> > + /*
> > + * We already have verified scaling against platform limitations.
> > + * Now check if the SSPP supports scaling at all.
> > + */
> > + if (!sblk->scaler_blk.len &&
> > + ((drm_rect_width(&new_plane_state->src) >> 16 !=
> > + drm_rect_width(&new_plane_state->dst)) ||
> > + (drm_rect_height(&new_plane_state->src) >> 16 !=
> > + drm_rect_height(&new_plane_state->dst))))
> > + return -ERANGE;
> > +
>
> Should this part be retained under dpu_plane_atomic_check_nopipe()?
>
> This is also not pipe dependent.
No, it uses sblk->scaler_blk, so it depends on the actual SSPP being
used for this pipe.
>
> > + fmt = msm_framebuffer_format(new_plane_state->fb);
> > +
> > + max_linewidth = pdpu->catalog->caps->max_linewidth;
> > +
> > + ret = dpu_plane_atomic_check_pipe(pdpu, pipe, pipe_cfg, fmt,
> > + &crtc_state->adjusted_mode);
> > + if (ret)
> > + 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
> > @@ -894,12 +932,6 @@ static int dpu_plane_atomic_check(struct drm_plane *plane,
> > return -E2BIG;
> > }
> >
> > - if (drm_rect_width(&pipe_cfg->src_rect) > 2 * max_linewidth) {
> > - DPU_DEBUG_PLANE(pdpu, "invalid src " DRM_RECT_FMT " line:%u\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) &&
> > @@ -921,26 +953,6 @@ static int dpu_plane_atomic_check(struct drm_plane *plane,
> > r_pipe->multirect_index = DPU_SSPP_RECT_1;
> > r_pipe->multirect_mode = DPU_SSPP_MULTIRECT_PARALLEL;
> >
> > - *r_pipe_cfg = *pipe_cfg;
> > - pipe_cfg->src_rect.x2 = (pipe_cfg->src_rect.x1 + pipe_cfg->src_rect.x2) >> 1;
> > - pipe_cfg->dst_rect.x2 = (pipe_cfg->dst_rect.x1 + pipe_cfg->dst_rect.x2) >> 1;
> > - r_pipe_cfg->src_rect.x1 = pipe_cfg->src_rect.x2;
> > - r_pipe_cfg->dst_rect.x1 = pipe_cfg->dst_rect.x2;
> > - }
> > -
> > - drm_rect_rotate_inv(&pipe_cfg->src_rect,
> > - new_plane_state->fb->width, new_plane_state->fb->height,
> > - new_plane_state->rotation);
> > - if (r_pipe->sspp)
> > - drm_rect_rotate_inv(&r_pipe_cfg->src_rect,
> > - new_plane_state->fb->width, new_plane_state->fb->height,
> > - new_plane_state->rotation);
> > -
> > - ret = dpu_plane_atomic_check_pipe(pdpu, pipe, pipe_cfg, fmt, &crtc_state->adjusted_mode);
> > - if (ret)
> > - return ret;
> > -
> > - if (r_pipe->sspp) {
> > ret = dpu_plane_atomic_check_pipe(pdpu, r_pipe, r_pipe_cfg, fmt,
> > &crtc_state->adjusted_mode);
> > if (ret)
> > @@ -963,11 +975,45 @@ static int dpu_plane_atomic_check(struct drm_plane *plane,
> > }
> >
> > pstate->rotation = rotation;
>
> The dpu_plane_check_inline_rotation() is also pipe independent. So even
> that goes to dpu_plane_atomic_check_nopipe()?
It also depends on the sblk if I remember correctly. Also note that
the next patch moves it to check_pipe().
>
> > - pstate->needs_qos_remap = drm_atomic_crtc_needs_modeset(crtc_state);
> >
> > return 0;
> > }
> >
>
> <snip>
>
--
With best wishes
Dmitry
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