| Message ID | 1596540744-6902-1-git-send-email-kalyan_t@codeaurora.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v1] drm/msm/dpu: update reservations in commit path | expand |
On 2020-08-05 01:02, Rob Clark wrote: > On Tue, Aug 4, 2020 at 4:32 AM Kalyan Thota <kalyan_t@codeaurora.org> > wrote: >> >> DPU resources reserved in the atomic_check path gets unwinded >> during modeset operation before commit happens in a non seamless >> transition. >> >> Update the reservations in the commit path to avoid resource >> failures. Secondly have dummy reservations in atomic_check path >> so that we can gracefully fail the composition if resources are >> not available. >> >> Signed-off-by: Kalyan Thota <kalyan_t@codeaurora.org> >> --- >> drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 15 +++++++++++---- >> 1 file changed, 11 insertions(+), 4 deletions(-) >> >> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c >> b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c >> index 63976dc..c6b8254 100644 >> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c >> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c >> @@ -565,7 +565,7 @@ static int dpu_encoder_virt_atomic_check( >> const struct drm_display_mode *mode; >> struct drm_display_mode *adj_mode; >> struct msm_display_topology topology; >> - struct dpu_global_state *global_state; >> + struct dpu_global_state tmp_resv_state; >> int i = 0; >> int ret = 0; >> >> @@ -582,7 +582,7 @@ static int dpu_encoder_virt_atomic_check( >> dpu_kms = to_dpu_kms(priv->kms); >> mode = &crtc_state->mode; >> adj_mode = &crtc_state->adjusted_mode; >> - global_state = dpu_kms_get_existing_global_state(dpu_kms); >> + memset(&tmp_resv_state, 0, sizeof(tmp_resv_state)); > > I think what you want to do is dpu_kms_get_global_state().. that will > clone/duplicate the existing global state (or return the already > duplicated global state if it is called multiple times). > Thanks Rob, realized the same after posting patch. Made changes in the new patch accordingly. > It is safe to modify this global state in the atomic_check() path.. in > fact that is the intention. For a TEST_ONLY atomic commit, or if any > of the atomic_check()'s fail, this new duplicated global state is > discarded. If all the checks succeed and the atomic update is > committed to hw, this new global state replaces the existing global > state. > Posted a new change kindly review. > BR, > -R > >> trace_dpu_enc_atomic_check(DRMID(drm_enc)); >> >> /* >> @@ -621,7 +621,7 @@ static int dpu_encoder_virt_atomic_check( >> * info may not be available to complete reservation. >> */ >> if (drm_atomic_crtc_needs_modeset(crtc_state)) { >> - ret = dpu_rm_reserve(&dpu_kms->rm, >> global_state, >> + ret = dpu_rm_reserve(&dpu_kms->rm, >> &tmp_resv_state, >> drm_enc, crtc_state, >> topology); >> } >> } >> @@ -966,7 +966,7 @@ static void dpu_encoder_virt_mode_set(struct >> drm_encoder *drm_enc, >> struct dpu_hw_blk *hw_lm[MAX_CHANNELS_PER_ENC]; >> struct dpu_hw_blk *hw_dspp[MAX_CHANNELS_PER_ENC] = { NULL }; >> int num_lm, num_ctl, num_pp, num_dspp; >> - int i, j; >> + int i, j, rc; >> >> if (!drm_enc) { >> DPU_ERROR("invalid encoder\n"); >> @@ -1006,6 +1006,13 @@ static void dpu_encoder_virt_mode_set(struct >> drm_encoder *drm_enc, >> >> topology = dpu_encoder_get_topology(dpu_enc, dpu_kms, >> adj_mode); >> >> + rc = dpu_rm_reserve(&dpu_kms->rm, global_state, drm_enc, >> + drm_crtc->state, topology); >> + if (rc) { >> + DPU_ERROR_ENC(dpu_enc, "Failed to reserve >> resources\n"); >> + return; >> + } >> + >> /* Query resource that have been reserved in atomic check >> step. */ >> num_pp = dpu_rm_get_assigned_resources(&dpu_kms->rm, >> global_state, >> drm_enc->base.id, DPU_HW_BLK_PINGPONG, hw_pp, >> -- >> 1.9.1 >> > _______________________________________________ > Freedreno mailing list > Freedreno@lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/freedreno
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c index 63976dc..c6b8254 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c @@ -565,7 +565,7 @@ static int dpu_encoder_virt_atomic_check( const struct drm_display_mode *mode; struct drm_display_mode *adj_mode; struct msm_display_topology topology; - struct dpu_global_state *global_state; + struct dpu_global_state tmp_resv_state; int i = 0; int ret = 0; @@ -582,7 +582,7 @@ static int dpu_encoder_virt_atomic_check( dpu_kms = to_dpu_kms(priv->kms); mode = &crtc_state->mode; adj_mode = &crtc_state->adjusted_mode; - global_state = dpu_kms_get_existing_global_state(dpu_kms); + memset(&tmp_resv_state, 0, sizeof(tmp_resv_state)); trace_dpu_enc_atomic_check(DRMID(drm_enc)); /* @@ -621,7 +621,7 @@ static int dpu_encoder_virt_atomic_check( * info may not be available to complete reservation. */ if (drm_atomic_crtc_needs_modeset(crtc_state)) { - ret = dpu_rm_reserve(&dpu_kms->rm, global_state, + ret = dpu_rm_reserve(&dpu_kms->rm, &tmp_resv_state, drm_enc, crtc_state, topology); } } @@ -966,7 +966,7 @@ static void dpu_encoder_virt_mode_set(struct drm_encoder *drm_enc, struct dpu_hw_blk *hw_lm[MAX_CHANNELS_PER_ENC]; struct dpu_hw_blk *hw_dspp[MAX_CHANNELS_PER_ENC] = { NULL }; int num_lm, num_ctl, num_pp, num_dspp; - int i, j; + int i, j, rc; if (!drm_enc) { DPU_ERROR("invalid encoder\n"); @@ -1006,6 +1006,13 @@ static void dpu_encoder_virt_mode_set(struct drm_encoder *drm_enc, topology = dpu_encoder_get_topology(dpu_enc, dpu_kms, adj_mode); + rc = dpu_rm_reserve(&dpu_kms->rm, global_state, drm_enc, + drm_crtc->state, topology); + if (rc) { + DPU_ERROR_ENC(dpu_enc, "Failed to reserve resources\n"); + return; + } + /* Query resource that have been reserved in atomic check step. */ num_pp = dpu_rm_get_assigned_resources(&dpu_kms->rm, global_state, drm_enc->base.id, DPU_HW_BLK_PINGPONG, hw_pp,
DPU resources reserved in the atomic_check path gets unwinded during modeset operation before commit happens in a non seamless transition. Update the reservations in the commit path to avoid resource failures. Secondly have dummy reservations in atomic_check path so that we can gracefully fail the composition if resources are not available. Signed-off-by: Kalyan Thota <kalyan_t@codeaurora.org> --- drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-)