| Message ID | 20230222-konrad-longbois-next-v1-5-01021425781b@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | OPP and devfreq for all Adrenos | expand |
On 22/02/2023 23:47, Konrad Dybcio wrote: > Add the dev_pm_opp_of_find_icc_paths() call to let the OPP framework > handle bus voting as part of power level setting. This can probably go to the generic code path rather than sticking it into a5xx only. > > Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org> > --- > drivers/gpu/drm/msm/adreno/a5xx_gpu.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c > index d09221f97f71..a33af0cc27b6 100644 > --- a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c > +++ b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c > @@ -1775,5 +1775,9 @@ struct msm_gpu *a5xx_gpu_init(struct drm_device *dev) > /* Set up the preemption specific bits and pieces for each ringbuffer */ > a5xx_preempt_init(gpu); > > + ret = dev_pm_opp_of_find_icc_paths(&pdev->dev, NULL); > + if (ret) > + return ERR_PTR(ret); > + > return gpu; > } >
On 22.02.2023 23:12, Dmitry Baryshkov wrote: > On 22/02/2023 23:47, Konrad Dybcio wrote: >> Add the dev_pm_opp_of_find_icc_paths() call to let the OPP framework >> handle bus voting as part of power level setting. > > This can probably go to the generic code path rather than sticking it into a5xx only. The reasoning is explained in the cover letter, a3xx/a4xx already have "raw" icc set calls which would require more work (and above all, testing) to untangle while keeping backwards compat, this is a midterm solution that would allow getting scaling to work earlier. Konrad > >> >> Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org> >> --- >> drivers/gpu/drm/msm/adreno/a5xx_gpu.c | 4 ++++ >> 1 file changed, 4 insertions(+) >> >> diff --git a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c >> index d09221f97f71..a33af0cc27b6 100644 >> --- a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c >> +++ b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c >> @@ -1775,5 +1775,9 @@ struct msm_gpu *a5xx_gpu_init(struct drm_device *dev) >> /* Set up the preemption specific bits and pieces for each ringbuffer */ >> a5xx_preempt_init(gpu); >> + ret = dev_pm_opp_of_find_icc_paths(&pdev->dev, NULL); >> + if (ret) >> + return ERR_PTR(ret); >> + >> return gpu; >> } >> >
On 23/02/2023 00:14, Konrad Dybcio wrote: > > > On 22.02.2023 23:12, Dmitry Baryshkov wrote: >> On 22/02/2023 23:47, Konrad Dybcio wrote: >>> Add the dev_pm_opp_of_find_icc_paths() call to let the OPP framework >>> handle bus voting as part of power level setting. >> >> This can probably go to the generic code path rather than sticking it into a5xx only. > The reasoning is explained in the cover letter, a3xx/a4xx already > have "raw" icc set calls which would require more work (and above > all, testing) to untangle while keeping backwards compat, this is > a midterm solution that would allow getting scaling to work earlier. Those two platforms call icc_set_bw() during setup, however their opp tables do not contain BW settings, making dev_pm_opp_of_find_icc_paths() nop. So, I think, we might as well call this function on a3xx/a4xx, making the code future proof. > > Konrad >> >>> >>> Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org> >>> --- >>> drivers/gpu/drm/msm/adreno/a5xx_gpu.c | 4 ++++ >>> 1 file changed, 4 insertions(+) >>> >>> diff --git a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c >>> index d09221f97f71..a33af0cc27b6 100644 >>> --- a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c >>> +++ b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c >>> @@ -1775,5 +1775,9 @@ struct msm_gpu *a5xx_gpu_init(struct drm_device *dev) >>> /* Set up the preemption specific bits and pieces for each ringbuffer */ >>> a5xx_preempt_init(gpu); >>> + ret = dev_pm_opp_of_find_icc_paths(&pdev->dev, NULL); >>> + if (ret) >>> + return ERR_PTR(ret); >>> + >>> return gpu; >>> } >>> >>
diff --git a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c index d09221f97f71..a33af0cc27b6 100644 --- a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c +++ b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c @@ -1775,5 +1775,9 @@ struct msm_gpu *a5xx_gpu_init(struct drm_device *dev) /* Set up the preemption specific bits and pieces for each ringbuffer */ a5xx_preempt_init(gpu); + ret = dev_pm_opp_of_find_icc_paths(&pdev->dev, NULL); + if (ret) + return ERR_PTR(ret); + return gpu; }
Add the dev_pm_opp_of_find_icc_paths() call to let the OPP framework handle bus voting as part of power level setting. Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org> --- drivers/gpu/drm/msm/adreno/a5xx_gpu.c | 4 ++++ 1 file changed, 4 insertions(+)