| Message ID | 20201117172608.2091648-1-swboyd@chromium.org |
|---|---|
| State | New |
| Headers | show |
| Series | drm/msm/dpu: Remove chatty vbif debug print | expand |
On 2020-11-17 09:26, Stephen Boyd wrote: > I don't know what this debug print is for but it is super chatty, > throwing 8 lines of debug prints in the logs every time we update a > plane. It looks like it has no value. Let's nuke it so we can get > better logs. > > Cc: Sean Paul <sean@poorly.run> > Cc: Abhinav Kumar <abhinavk@codeaurora.org> > Signed-off-by: Stephen Boyd <swboyd@chromium.org> > --- > drivers/gpu/drm/msm/disp/dpu1/dpu_vbif.c | 3 --- > 1 file changed, 3 deletions(-) > > diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_vbif.c > b/drivers/gpu/drm/msm/disp/dpu1/dpu_vbif.c > index 5e8c3f3e6625..5eb2b2ee09f5 100644 > --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_vbif.c > +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_vbif.c > @@ -245,9 +245,6 @@ void dpu_vbif_set_qos_remap(struct dpu_kms > *dpu_kms, > forced_on = mdp->ops.setup_clk_force_ctrl(mdp, params->clk_ctrl, > true); > > for (i = 0; i < qos_tbl->npriority_lvl; i++) { > - DPU_DEBUG("vbif:%d xin:%d lvl:%d/%d\n", > - params->vbif_idx, params->xin_id, i, > - qos_tbl->priority_lvl[i]); Instead of getting rid of this print, we should optimize the caller of this. This is what we are doing in downstream. So we need to update the property only if we are switching from a RT client to non-RT client for the plane and vice-versa. So we should try to do the same thing here. is_rt = sde_crtc_is_rt_client(crtc, crtc->state); if (is_rt != psde->is_rt_pipe) { psde->is_rt_pipe = is_rt; pstate->dirty |= SDE_PLANE_DIRTY_QOS; } if (pstate->dirty & DPU_PLANE_DIRTY_QOS) _dpu_plane_set_qos_remap(plane);
Quoting abhinavk@codeaurora.org (2020-11-17 12:34:56) > On 2020-11-17 09:26, Stephen Boyd wrote: > > I don't know what this debug print is for but it is super chatty, > > throwing 8 lines of debug prints in the logs every time we update a > > plane. It looks like it has no value. Let's nuke it so we can get > > better logs. > > > > Cc: Sean Paul <sean@poorly.run> > > Cc: Abhinav Kumar <abhinavk@codeaurora.org> > > Signed-off-by: Stephen Boyd <swboyd@chromium.org> > > > --- > > drivers/gpu/drm/msm/disp/dpu1/dpu_vbif.c | 3 --- > > 1 file changed, 3 deletions(-) > > > > diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_vbif.c > > b/drivers/gpu/drm/msm/disp/dpu1/dpu_vbif.c > > index 5e8c3f3e6625..5eb2b2ee09f5 100644 > > --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_vbif.c > > +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_vbif.c > > @@ -245,9 +245,6 @@ void dpu_vbif_set_qos_remap(struct dpu_kms > > *dpu_kms, > > forced_on = mdp->ops.setup_clk_force_ctrl(mdp, params->clk_ctrl, > > true); > > > > for (i = 0; i < qos_tbl->npriority_lvl; i++) { > > - DPU_DEBUG("vbif:%d xin:%d lvl:%d/%d\n", > > - params->vbif_idx, params->xin_id, i, > > - qos_tbl->priority_lvl[i]); > > Instead of getting rid of this print, we should optimize the caller of > this. Does the print tell us anything? Right now it prints 8 lines where it feels like it could be trimmed down: [drm:dpu_vbif_set_qos_remap] vbif:0 xin:0 lvl:0/3 [drm:dpu_vbif_set_qos_remap] vbif:0 xin:0 lvl:1/3 [drm:dpu_vbif_set_qos_remap] vbif:0 xin:0 lvl:2/4 [drm:dpu_vbif_set_qos_remap] vbif:0 xin:0 lvl:3/4 [drm:dpu_vbif_set_qos_remap] vbif:0 xin:0 lvl:4/5 [drm:dpu_vbif_set_qos_remap] vbif:0 xin:0 lvl:5/5 [drm:dpu_vbif_set_qos_remap] vbif:0 xin:0 lvl:6/6 [drm:dpu_vbif_set_qos_remap] vbif:0 xin:0 lvl:7/6 maybe one line that combines the index into values? [drm:dpu_vbif_set_qos_remap] vbif:0 xin:0 [3 3 4 4 5 5 6 6] But again I have no idea if this print is really useful. Maybe we can print it only if the value changes from what was already there? Basically move the print into dpu_hw_set_qos_remap() and then skip out early if nothing changed or print and modify the register. > This is what > we are doing in downstream. So we need to update the property only if we > are switching from a RT client > to non-RT client for the plane and vice-versa. So we should try to do > the same thing here. > > is_rt = sde_crtc_is_rt_client(crtc, crtc->state); > if (is_rt != psde->is_rt_pipe) { > psde->is_rt_pipe = is_rt; > pstate->dirty |= SDE_PLANE_DIRTY_QOS; > } > > > if (pstate->dirty & DPU_PLANE_DIRTY_QOS) > _dpu_plane_set_qos_remap(plane); > Sounds great! Can you send the patch?
Hi Stephen On 2020-11-18 07:49, Rob Clark wrote: > On Tue, Nov 17, 2020 at 2:53 PM Stephen Boyd <swboyd@chromium.org> > wrote: >> >> Quoting abhinavk@codeaurora.org (2020-11-17 12:34:56) >> > On 2020-11-17 09:26, Stephen Boyd wrote: >> > > I don't know what this debug print is for but it is super chatty, >> > > throwing 8 lines of debug prints in the logs every time we update a >> > > plane. It looks like it has no value. Let's nuke it so we can get >> > > better logs. >> > > >> > > Cc: Sean Paul <sean@poorly.run> >> > > Cc: Abhinav Kumar <abhinavk@codeaurora.org> >> > > Signed-off-by: Stephen Boyd <swboyd@chromium.org> >> > >> > > --- >> > > drivers/gpu/drm/msm/disp/dpu1/dpu_vbif.c | 3 --- >> > > 1 file changed, 3 deletions(-) >> > > >> > > diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_vbif.c >> > > b/drivers/gpu/drm/msm/disp/dpu1/dpu_vbif.c >> > > index 5e8c3f3e6625..5eb2b2ee09f5 100644 >> > > --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_vbif.c >> > > +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_vbif.c >> > > @@ -245,9 +245,6 @@ void dpu_vbif_set_qos_remap(struct dpu_kms >> > > *dpu_kms, >> > > forced_on = mdp->ops.setup_clk_force_ctrl(mdp, params->clk_ctrl, >> > > true); >> > > >> > > for (i = 0; i < qos_tbl->npriority_lvl; i++) { >> > > - DPU_DEBUG("vbif:%d xin:%d lvl:%d/%d\n", >> > > - params->vbif_idx, params->xin_id, i, >> > > - qos_tbl->priority_lvl[i]); >> > >> > Instead of getting rid of this print, we should optimize the caller of >> > this. >> >> Does the print tell us anything? Right now it prints 8 lines where it >> feels like it could be trimmed down: >> >> [drm:dpu_vbif_set_qos_remap] vbif:0 xin:0 lvl:0/3 >> [drm:dpu_vbif_set_qos_remap] vbif:0 xin:0 lvl:1/3 >> [drm:dpu_vbif_set_qos_remap] vbif:0 xin:0 lvl:2/4 >> [drm:dpu_vbif_set_qos_remap] vbif:0 xin:0 lvl:3/4 >> [drm:dpu_vbif_set_qos_remap] vbif:0 xin:0 lvl:4/5 >> [drm:dpu_vbif_set_qos_remap] vbif:0 xin:0 lvl:5/5 >> [drm:dpu_vbif_set_qos_remap] vbif:0 xin:0 lvl:6/6 >> [drm:dpu_vbif_set_qos_remap] vbif:0 xin:0 lvl:7/6 >> >> maybe one line that combines the index into values? >> >> [drm:dpu_vbif_set_qos_remap] vbif:0 xin:0 [3 3 4 4 5 5 6 6] >> > > or possibly convert to a tracepoint (so it doesn't spam the drm_trace > buffer) > > BR, > -R > >> But again I have no idea if this print is really useful. Maybe we can >> print it only if the value changes from what was already there? >> Basically move the print into dpu_hw_set_qos_remap() and then skip out >> early if nothing changed or print and modify the register. >> >> > This is what >> > we are doing in downstream. So we need to update the property only if we >> > are switching from a RT client >> > to non-RT client for the plane and vice-versa. So we should try to do >> > the same thing here. >> > >> > is_rt = sde_crtc_is_rt_client(crtc, crtc->state); >> > if (is_rt != psde->is_rt_pipe) { >> > psde->is_rt_pipe = is_rt; >> > pstate->dirty |= SDE_PLANE_DIRTY_QOS; >> > } >> > >> > >> > if (pstate->dirty & DPU_PLANE_DIRTY_QOS) >> > _dpu_plane_set_qos_remap(plane); >> > >> >> Sounds great! Can you send the patch? Will finalize approach and send the patch in a day or two. Thanks Abhinav
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_vbif.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_vbif.c index 5e8c3f3e6625..5eb2b2ee09f5 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_vbif.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_vbif.c @@ -245,9 +245,6 @@ void dpu_vbif_set_qos_remap(struct dpu_kms *dpu_kms, forced_on = mdp->ops.setup_clk_force_ctrl(mdp, params->clk_ctrl, true); for (i = 0; i < qos_tbl->npriority_lvl; i++) { - DPU_DEBUG("vbif:%d xin:%d lvl:%d/%d\n", - params->vbif_idx, params->xin_id, i, - qos_tbl->priority_lvl[i]); vbif->ops.set_qos_remap(vbif, params->xin_id, i, qos_tbl->priority_lvl[i]); }
I don't know what this debug print is for but it is super chatty, throwing 8 lines of debug prints in the logs every time we update a plane. It looks like it has no value. Let's nuke it so we can get better logs. Cc: Sean Paul <sean@poorly.run> Cc: Abhinav Kumar <abhinavk@codeaurora.org> Signed-off-by: Stephen Boyd <swboyd@chromium.org> --- drivers/gpu/drm/msm/disp/dpu1/dpu_vbif.c | 3 --- 1 file changed, 3 deletions(-)