Messages in this thread | | | Date | Sun, 14 Apr 2024 13:39:59 +0100 | Subject | Re: [PATCH V5 RESEND 5/5] venus: pm_helpers: Use dev_pm_genpd_set_hwmode to switch GDSC mode on V6 | From | Bryan O'Donoghue <> |
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On 13/04/2024 16:20, Jagadeesh Kona wrote: > The Venus driver requires vcodec GDSC to be ON in SW mode for clock > operations and move it back to HW mode to gain power benefits. Earlier, > as there is no interface to switch the GDSC mode from GenPD framework, > the GDSC is moved to HW control mode as part of GDSC enable callback and > venus driver is writing to its POWER_CONTROL register to keep the GDSC ON > from SW whereever required. But the POWER_CONTROL register addresses > are not constant and can vary across the variants. > > Also as per the HW recommendation, the GDSC mode switching needs to be > controlled from respective GDSC register and this is a uniform approach > across all the targets. Hence use dev_pm_genpd_set_hwmode() API which > controls GDSC mode switching using its respective GDSC register. > > In venus V6 variants, the vcodec gdsc gets enabled in SW mode by default > with new HW_CTRL_TRIGGER flag and there is no need to switch it to SW > mode again after enable, hence add check to avoid switching gdsc to SW mode > again after gdsc enable. Similarly add check to avoid switching GDSC to HW > mode before disabling the GDSC, so GDSC gets enabled in SW mode in the next > enable. > > Signed-off-by: Jagadeesh Kona <quic_jkona@quicinc.com> > Signed-off-by: Abel Vesa <abel.vesa@linaro.org> > ---
When I tested this out on sm8250 a few months ago it was broken.
I don't quite see in your commit logs, how the breakage was addressed.
Can you provide some details ?
--- bod
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