On 10/24/25 3:16 PM, Rob Clark wrote: > On Fri, Oct 24, 2025 at 12:55 AM Konrad Dybcio > <[email protected]> wrote: >> >> On 10/24/25 12:57 AM, Akhil P Oommen wrote: >>> On 10/22/2025 8:43 PM, Konrad Dybcio wrote: >>>> On 10/17/25 7:08 PM, Akhil P Oommen wrote: >>>>> From: Jie Zhang <[email protected]> >>>>> >>>>> Add support for Adreno 612 GPU found in SM6150/QCS615 chipsets. >>>>> A612 falls under ADRENO_6XX_GEN1 family and is a cut down version >>>>> of A615 GPU. >>>>> >>>>> A612 has a new IP called Reduced Graphics Management Unit or RGMU >>>>> which is a small state machine which helps to toggle GX GDSC >>>>> (connected to CX rail) to implement IFPC feature. It doesn't support >>>>> any other features of a full fledged GMU like clock control, resource >>>>> voting to rpmh etc. So we need linux clock driver support like other >>>>> gmu-wrapper implementations to control gpu core clock and gpu GX gdsc. >>>>> This patch skips RGMU core initialization and act more like a >>>>> gmu-wrapper case. >>>>> >>>>> Co-developed-by: Akhil P Oommen <[email protected]> >>>>> Signed-off-by: Jie Zhang <[email protected]> >>>>> Signed-off-by: Akhil P Oommen <[email protected]> >>>>> --- >>>> >>>> [...] >>>> >>>>> @@ -350,12 +350,18 @@ static const struct a6xx_gmu_oob_bits >>>>> a6xx_gmu_oob_bits[] = { >>>>> /* Trigger a OOB (out of band) request to the GMU */ >>>>> int a6xx_gmu_set_oob(struct a6xx_gmu *gmu, enum a6xx_gmu_oob_state state) >>>>> { >>>>> + struct a6xx_gpu *a6xx_gpu = container_of(gmu, struct a6xx_gpu, gmu); >>>>> + struct adreno_gpu *adreno_gpu = &a6xx_gpu->base; >>>>> int ret; >>>>> u32 val; >>>>> int request, ack; >>>>> >>>>> WARN_ON_ONCE(!mutex_is_locked(&gmu->lock)); >>>>> >>>>> + /* Skip OOB calls since RGMU is not enabled */ >>>> >>>> "RGMU doesn't handle OOB calls" >>> >>> Technically RGMU can handle OOB calls. But we are not initializing rgmu. >> >> Oh, I glossed over that.. >> >> IIRC the reason we delayed 612 support in the past was to make sure >> that the RGMU FW is consumed, so that runtime requirements don't >> suddenly change one day. >> >> If you have no interest/way in getting it wholly supported right now, >> can you at least make sure that the driver requests the firmware and >> exits if it's absent? > > adreno_load_gpu() calls adreno_load_fw() first thing, and will bail if > gmu fw is missing. (zap fw is a bit more awkward since that could > come from dt or device table.)
Indeed you're right Konrad
