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clk: qcom: gdsc: Enable supply reglator in GPU GX handler

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The GX GDSC is modelled to aid the GMU in powering down the GPU in the
event that the GPU crashes, so that it can be restarted again. But in
the event that the power-domain is supplied through a dedicated
regulator (in contrast to being a subdomin of another power-domain),
something needs to turn that regulator on, both to make sure things are
powered and to match the operation in gdsc_disable().

Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <quic_bjorande@quicinc.com>
Link: https://lore.kernel.org/r/20240125-sa8295p-gpu-v4-2-7011c2a63037@quicinc.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
This commit is contained in:
Bjorn Andersson 2024-01-25 13:05:08 -08:00 committed by Bjorn Andersson
parent e60b95d2b6
commit 9187ebb954
1 changed files with 10 additions and 2 deletions
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12
drivers/clk/qcom/gdsc.c
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@ -557,7 +557,15 @@ void gdsc_unregister(struct gdsc_desc *desc)
*/
int gdsc_gx_do_nothing_enable(struct generic_pm_domain *domain)
{
/* Do nothing but give genpd the impression that we were successful */
return 0;
struct gdsc *sc = domain_to_gdsc(domain);
int ret = 0;
/* Enable the parent supply, when controlled through the regulator framework. */
if (sc->rsupply)
ret = regulator_enable(sc->rsupply);
/* Do nothing with the GDSC itself */
return ret;
}
EXPORT_SYMBOL_GPL(gdsc_gx_do_nothing_enable);