On Mon, May 29, 2023 at 03:52:29PM +0200, Konrad Dybcio wrote: > > Some (particularly SMD_RPM, a.k.a non-RPMh) SoCs implement A6XX GPUs > but don't implement the associated GMUs. This is due to the fact that > the GMU directly pokes at RPMh. Sadly, this means we have to take care > of enabling & scaling power rails, clocks and bandwidth ourselves. > > Reuse existing Adreno-common code and modify the deeply-GMU-infused > A6XX code to facilitate these GPUs. This involves if-ing out lots > of GMU callbacks and introducing a new type of GMU - GMU wrapper (it's > the actual name that Qualcomm uses in their downstream kernels). > > This is essentially a register region which is convenient to model > as a device. We'll use it for managing the GDSCs. The register > layout matches the actual GMU_CX/GX regions on the "real GMU" devices > and lets us reuse quite a bit of gmu_read/write/rmw calls. > > Signed-off-by: Konrad Dybcio <konrad.dyb...@linaro.org> > --- > drivers/gpu/drm/msm/adreno/a6xx_gmu.c | 72 +++++++++- > drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 211 > ++++++++++++++++++++++++---- > drivers/gpu/drm/msm/adreno/a6xx_gpu.h | 1 + > drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c | 14 +- > drivers/gpu/drm/msm/adreno/adreno_gpu.c | 8 +- > drivers/gpu/drm/msm/adreno/adreno_gpu.h | 6 + > 6 files changed, 277 insertions(+), 35 deletions(-) > > diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c > b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c > index 5ba8cba69383..385ca3a12462 100644 > --- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c > +++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c > @@ -1437,6 +1437,7 @@ static int a6xx_gmu_get_irq(struct a6xx_gmu *gmu, > struct platform_device *pdev, > > void a6xx_gmu_remove(struct a6xx_gpu *a6xx_gpu) > { > + struct adreno_gpu *adreno_gpu = &a6xx_gpu->base; > struct a6xx_gmu *gmu = &a6xx_gpu->gmu; > struct platform_device *pdev = to_platform_device(gmu->dev); > > @@ -1462,10 +1463,12 @@ void a6xx_gmu_remove(struct a6xx_gpu *a6xx_gpu) > gmu->mmio = NULL; > gmu->rscc = NULL; > > - a6xx_gmu_memory_free(gmu); > + if (!adreno_has_gmu_wrapper(adreno_gpu)) { > + a6xx_gmu_memory_free(gmu); > > - free_irq(gmu->gmu_irq, gmu); > - free_irq(gmu->hfi_irq, gmu); > + free_irq(gmu->gmu_irq, gmu); > + free_irq(gmu->hfi_irq, gmu); > + } > > /* Drop reference taken in of_find_device_by_node */ > put_device(gmu->dev); > @@ -1484,6 +1487,69 @@ static int cxpd_notifier_cb(struct notifier_block *nb, > return 0; > } > > +int a6xx_gmu_wrapper_init(struct a6xx_gpu *a6xx_gpu, struct device_node > *node) > +{ > + struct platform_device *pdev = of_find_device_by_node(node); > + struct a6xx_gmu *gmu = &a6xx_gpu->gmu; > + int ret; > + > + if (!pdev) > + return -ENODEV; > + > + gmu->dev = &pdev->dev; > + > + of_dma_configure(gmu->dev, node, true); > + > + pm_runtime_enable(gmu->dev); > + > + /* Mark legacy for manual SPTPRAC control */ > + gmu->legacy = true; > + > + /* Map the GMU registers */ > + gmu->mmio = a6xx_gmu_get_mmio(pdev, "gmu"); > + if (IS_ERR(gmu->mmio)) { > + ret = PTR_ERR(gmu->mmio); > + goto err_mmio; > + } > + > + gmu->cxpd = dev_pm_domain_attach_by_name(gmu->dev, "cx"); > + if (IS_ERR(gmu->cxpd)) { > + ret = PTR_ERR(gmu->cxpd); > + goto err_mmio; > + } > + > + if (!device_link_add(gmu->dev, gmu->cxpd, DL_FLAG_PM_RUNTIME)) { > + ret = -ENODEV; > + goto detach_cxpd; > + } > + > + init_completion(&gmu->pd_gate); > + complete_all(&gmu->pd_gate); > + gmu->pd_nb.notifier_call = cxpd_notifier_cb; > + > + /* Get a link to the GX power domain to reset the GPU */ > + gmu->gxpd = dev_pm_domain_attach_by_name(gmu->dev, "gx"); > + if (IS_ERR(gmu->gxpd)) { > + ret = PTR_ERR(gmu->gxpd); > + goto err_mmio; > + } > + > + gmu->initialized = true; > + > + return 0; > + > +detach_cxpd: > + dev_pm_domain_detach(gmu->cxpd, false); > + > +err_mmio: > + iounmap(gmu->mmio); > + > + /* Drop reference taken in of_find_device_by_node */ > + put_device(gmu->dev); > + > + return ret; > +} > + > int a6xx_gmu_init(struct a6xx_gpu *a6xx_gpu, struct device_node *node) > { > struct adreno_gpu *adreno_gpu = &a6xx_gpu->base; > diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c > b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c > index 58bf405b85d8..0a44762dbb6d 100644 > --- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c > +++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c > @@ -21,7 +21,7 @@ static inline bool _a6xx_check_idle(struct msm_gpu *gpu) > struct a6xx_gpu *a6xx_gpu = to_a6xx_gpu(adreno_gpu); > > /* Check that the GMU is idle */ > - if (!a6xx_gmu_isidle(&a6xx_gpu->gmu)) > + if (!adreno_has_gmu_wrapper(adreno_gpu) && > !a6xx_gmu_isidle(&a6xx_gpu->gmu)) > return false; > > /* Check tha the CX master is idle */ > @@ -1018,10 +1018,13 @@ static int hw_init(struct msm_gpu *gpu) > { > struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu); > struct a6xx_gpu *a6xx_gpu = to_a6xx_gpu(adreno_gpu); > + struct a6xx_gmu *gmu = &a6xx_gpu->gmu; > int ret; > > - /* Make sure the GMU keeps the GPU on while we set it up */ > - a6xx_gmu_set_oob(&a6xx_gpu->gmu, GMU_OOB_GPU_SET); > + if (!adreno_has_gmu_wrapper(adreno_gpu)) { > + /* Make sure the GMU keeps the GPU on while we set it up */ > + a6xx_gmu_set_oob(&a6xx_gpu->gmu, GMU_OOB_GPU_SET); > + } > > /* Clear GBIF halt in case GX domain was not collapsed */ > if (a6xx_has_gbif(adreno_gpu)) { > @@ -1148,6 +1151,17 @@ static int hw_init(struct msm_gpu *gpu) > 0x3f0243f0); > } > > + if (adreno_has_gmu_wrapper(adreno_gpu)) { > + /* Do it here, as GMU wrapper only inits the GMU for memory > reservation etc. */ > + > + /* Set up the CX GMU counter 0 to count busy ticks */ > + gmu_write(gmu, REG_A6XX_GPU_GMU_AO_GPU_CX_BUSY_MASK, > 0xff000000); > + > + /* Enable power counter 0 */ > + gmu_rmw(gmu, REG_A6XX_GMU_CX_GMU_POWER_COUNTER_SELECT_0, 0xff, > BIT(5)); > + gmu_write(gmu, REG_A6XX_GMU_CX_GMU_POWER_COUNTER_ENABLE, 1); > + }
nit: For gmu targets, we do this at a6xx_rpmh_start() which is an odd place to keep this. But I don't know the reason why it was decided to keep it there. I don't see any reason why we cannot keep it here for both gmu/gmu-wrapper like in the downstream driver. > + > /* Protect registers from the CP */ > a6xx_set_cp_protect(gpu); > > @@ -1237,6 +1251,8 @@ static int hw_init(struct msm_gpu *gpu) > } > > out: > + if (adreno_has_gmu_wrapper(adreno_gpu)) > + return ret; > /* > * Tell the GMU that we are done touching the GPU and it can start power > * management > @@ -1271,9 +1287,6 @@ static void a6xx_dump(struct msm_gpu *gpu) > adreno_dump(gpu); > } > > -#define VBIF_RESET_ACK_TIMEOUT 100 > -#define VBIF_RESET_ACK_MASK 0x00f0 > - > static void a6xx_recover(struct msm_gpu *gpu) > { > struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu); > @@ -1311,6 +1324,15 @@ static void a6xx_recover(struct msm_gpu *gpu) > */ > gpu->active_submits = 0; > > + if (adreno_has_gmu_wrapper(adreno_gpu)) { > + /* Drain the outstanding traffic on memory buses */ > + a6xx_bus_clear_pending_transactions(adreno_gpu, true); > + > + /* Reset the GPU to a clean state */ > + a6xx_gpu_sw_reset(gpu, true); > + a6xx_gpu_sw_reset(gpu, false); > + } > + > reinit_completion(&gmu->pd_gate); > dev_pm_genpd_add_notifier(gmu->cxpd, &gmu->pd_nb); > dev_pm_genpd_synced_poweroff(gmu->cxpd); > @@ -1461,7 +1483,8 @@ static void a6xx_fault_detect_irq(struct msm_gpu *gpu) > * Force the GPU to stay on until after we finish > * collecting information > */ > - gmu_write(&a6xx_gpu->gmu, REG_A6XX_GMU_GMU_PWR_COL_KEEPALIVE, 1); > + if (!adreno_has_gmu_wrapper(adreno_gpu)) > + gmu_write(&a6xx_gpu->gmu, REG_A6XX_GMU_GMU_PWR_COL_KEEPALIVE, > 1); > > DRM_DEV_ERROR(&gpu->pdev->dev, > "gpu fault ring %d fence %x status %8.8X rb %4.4x/%4.4x ib1 > %16.16llX/%4.4x ib2 %16.16llX/%4.4x\n", > @@ -1592,6 +1615,10 @@ static void a6xx_llc_activate(struct a6xx_gpu > *a6xx_gpu) > > static void a6xx_llc_slices_destroy(struct a6xx_gpu *a6xx_gpu) > { > + /* No LLCC on non-RPMh (and by extension, non-GMU) SoCs */ > + if (adreno_has_gmu_wrapper(&a6xx_gpu->base)) > + return; > + > llcc_slice_putd(a6xx_gpu->llc_slice); > llcc_slice_putd(a6xx_gpu->htw_llc_slice); > } > @@ -1601,6 +1628,10 @@ static void a6xx_llc_slices_init(struct > platform_device *pdev, > { > struct device_node *phandle; > > + /* No LLCC on non-RPMh (and by extension, non-GMU) SoCs */ > + if (adreno_has_gmu_wrapper(&a6xx_gpu->base)) > + return; > + > /* > * There is a different programming path for targets with an mmu500 > * attached, so detect if that is the case > @@ -1670,7 +1701,7 @@ void a6xx_gpu_sw_reset(struct msm_gpu *gpu, bool assert) > udelay(100); > } > > -static int a6xx_pm_resume(struct msm_gpu *gpu) > +static int a6xx_gmu_pm_resume(struct msm_gpu *gpu) > { > struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu); > struct a6xx_gpu *a6xx_gpu = to_a6xx_gpu(adreno_gpu); > @@ -1690,10 +1721,58 @@ static int a6xx_pm_resume(struct msm_gpu *gpu) > > a6xx_llc_activate(a6xx_gpu); > > - return 0; > + return ret; > } > > -static int a6xx_pm_suspend(struct msm_gpu *gpu) > +static int a6xx_pm_resume(struct msm_gpu *gpu) > +{ > + struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu); > + struct a6xx_gpu *a6xx_gpu = to_a6xx_gpu(adreno_gpu); > + struct a6xx_gmu *gmu = &a6xx_gpu->gmu; > + unsigned long freq = gpu->fast_rate; > + struct dev_pm_opp *opp; > + int ret; > + > + gpu->needs_hw_init = true; > + > + trace_msm_gpu_resume(0); > + > + mutex_lock(&a6xx_gpu->gmu.lock); Where is this lock initialized? If the init was moved out of a6xx_gmu_init(), can you please share that patch? > + > + opp = dev_pm_opp_find_freq_ceil(&gpu->pdev->dev, &freq); > + if (IS_ERR(opp)) { > + ret = PTR_ERR(opp); > + goto err_set_opp; > + } > + dev_pm_opp_put(opp); > + > + /* Set the core clock and bus bw, having VDD scaling in mind */ > + dev_pm_opp_set_opp(&gpu->pdev->dev, opp); > + > + pm_runtime_resume_and_get(gmu->dev); > + pm_runtime_resume_and_get(gmu->gxpd); > + > + ret = clk_bulk_prepare_enable(gpu->nr_clocks, gpu->grp_clks); > + if (ret) > + goto err_bulk_clk; > + > + /* If anything goes south, tear the GPU down piece by piece.. */ > + if (ret) { > +err_bulk_clk: Goto jump directly to another block looks odd to me. Why do you need this label anyway? > + pm_runtime_put(gmu->gxpd); > + pm_runtime_put(gmu->dev); > + dev_pm_opp_set_opp(&gpu->pdev->dev, NULL); > + } > +err_set_opp: Generally, it is better to name the label based on what you do here. For eg: "unlock_lock:". Also, this function is small enough that it is better to return directly in case of error. I think that would be more readable. > + mutex_unlock(&a6xx_gpu->gmu.lock); > + > + if (!ret) > + msm_devfreq_resume(gpu); > + > + return ret; > +} > + > +static int a6xx_gmu_pm_suspend(struct msm_gpu *gpu) > { > struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu); > struct a6xx_gpu *a6xx_gpu = to_a6xx_gpu(adreno_gpu); > @@ -1720,7 +1799,40 @@ static int a6xx_pm_suspend(struct msm_gpu *gpu) > return 0; > } > > -static int a6xx_get_timestamp(struct msm_gpu *gpu, uint64_t *value) > +static int a6xx_pm_suspend(struct msm_gpu *gpu) > +{ > + struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu); > + struct a6xx_gpu *a6xx_gpu = to_a6xx_gpu(adreno_gpu); > + struct a6xx_gmu *gmu = &a6xx_gpu->gmu; > + int i; > + > + trace_msm_gpu_suspend(0); > + > + msm_devfreq_suspend(gpu); > + > + mutex_lock(&a6xx_gpu->gmu.lock); Again, is this initialized somewhere? > + > + /* Drain the outstanding traffic on memory buses */ > + a6xx_bus_clear_pending_transactions(adreno_gpu, true); > + > + clk_bulk_disable_unprepare(gpu->nr_clocks, gpu->grp_clks); > + > + pm_runtime_put_sync(gmu->gxpd); > + dev_pm_opp_set_opp(&gpu->pdev->dev, NULL); > + pm_runtime_put_sync(gmu->dev); > + > + mutex_unlock(&a6xx_gpu->gmu.lock); > + > + if (a6xx_gpu->shadow_bo) > + for (i = 0; i < gpu->nr_rings; i++) > + a6xx_gpu->shadow[i] = 0; > + > + gpu->suspend_count++; > + > + return 0; > +} > + > +static int a6xx_gmu_get_timestamp(struct msm_gpu *gpu, uint64_t *value) > { > struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu); > struct a6xx_gpu *a6xx_gpu = to_a6xx_gpu(adreno_gpu); > @@ -1739,6 +1851,12 @@ static int a6xx_get_timestamp(struct msm_gpu *gpu, > uint64_t *value) > return 0; > } > > +static int a6xx_get_timestamp(struct msm_gpu *gpu, uint64_t *value) > +{ > + *value = gpu_read64(gpu, REG_A6XX_CP_ALWAYS_ON_COUNTER); > + return 0; > +} > + > static struct msm_ringbuffer *a6xx_active_ring(struct msm_gpu *gpu) > { > struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu); > @@ -2004,8 +2122,8 @@ static const struct adreno_gpu_funcs funcs = { > .set_param = adreno_set_param, > .hw_init = a6xx_hw_init, > .ucode_load = a6xx_ucode_load, > - .pm_suspend = a6xx_pm_suspend, > - .pm_resume = a6xx_pm_resume, > + .pm_suspend = a6xx_gmu_pm_suspend, > + .pm_resume = a6xx_gmu_pm_resume, > .recover = a6xx_recover, > .submit = a6xx_submit, > .active_ring = a6xx_active_ring, > @@ -2020,6 +2138,35 @@ static const struct adreno_gpu_funcs funcs = { > #if defined(CONFIG_DRM_MSM_GPU_STATE) > .gpu_state_get = a6xx_gpu_state_get, > .gpu_state_put = a6xx_gpu_state_put, > +#endif > + .create_address_space = a6xx_create_address_space, > + .create_private_address_space = > a6xx_create_private_address_space, > + .get_rptr = a6xx_get_rptr, > + .progress = a6xx_progress, > + }, > + .get_timestamp = a6xx_gmu_get_timestamp, > +}; > + > +static const struct adreno_gpu_funcs funcs_gmuwrapper = { > + .base = { > + .get_param = adreno_get_param, > + .set_param = adreno_set_param, > + .hw_init = a6xx_hw_init, > + .ucode_load = a6xx_ucode_load, > + .pm_suspend = a6xx_pm_suspend, > + .pm_resume = a6xx_pm_resume, > + .recover = a6xx_recover, > + .submit = a6xx_submit, > + .active_ring = a6xx_active_ring, > + .irq = a6xx_irq, > + .destroy = a6xx_destroy, > +#if defined(CONFIG_DRM_MSM_GPU_STATE) > + .show = a6xx_show, > +#endif > + .gpu_busy = a6xx_gpu_busy, > +#if defined(CONFIG_DRM_MSM_GPU_STATE) > + .gpu_state_get = a6xx_gpu_state_get, > + .gpu_state_put = a6xx_gpu_state_put, > #endif > .create_address_space = a6xx_create_address_space, > .create_private_address_space = > a6xx_create_private_address_space, > @@ -2050,15 +2197,31 @@ struct msm_gpu *a6xx_gpu_init(struct drm_device *dev) > > adreno_gpu->registers = NULL; > > + /* Check if there is a GMU phandle and set it up */ > + node = of_parse_phandle(pdev->dev.of_node, "qcom,gmu", 0); > + /* FIXME: How do we gracefully handle this? */ > + BUG_ON(!node); > + > + adreno_gpu->gmu_is_wrapper = of_device_is_compatible(node, > "qcom,adreno-gmu-wrapper"); > + > /* > * We need to know the platform type before calling into adreno_gpu_init > * so that the hw_apriv flag can be correctly set. Snoop into the info > * and grab the revision number > */ > info = adreno_info(config->rev); > - > - if (info && (info->revn == 650 || info->revn == 660 || > - adreno_cmp_rev(ADRENO_REV(6, 3, 5, ANY_ID), info->rev))) > + if (!info) > + return ERR_PTR(-EINVAL); > + > + /* Assign these early so that we can use the is_aXYZ helpers */ > + /* Numeric revision IDs (e.g. 630) */ > + adreno_gpu->revn = info->revn; > + /* New-style ADRENO_REV()-only */ > + adreno_gpu->rev = info->rev; > + /* Quirk data */ > + adreno_gpu->info = info; > + > + if (adreno_is_a650(adreno_gpu) || adreno_is_a660_family(adreno_gpu)) > adreno_gpu->base.hw_apriv = true; > > a6xx_llc_slices_init(pdev, a6xx_gpu); > @@ -2069,7 +2232,10 @@ struct msm_gpu *a6xx_gpu_init(struct drm_device *dev) > return ERR_PTR(ret); > } > > - ret = adreno_gpu_init(dev, pdev, adreno_gpu, &funcs, 1); > + if (adreno_has_gmu_wrapper(adreno_gpu)) > + ret = adreno_gpu_init(dev, pdev, adreno_gpu, &funcs_gmuwrapper, > 1); > + else > + ret = adreno_gpu_init(dev, pdev, adreno_gpu, &funcs, 1); > if (ret) { > a6xx_destroy(&(a6xx_gpu->base.base)); > return ERR_PTR(ret); > @@ -2082,13 +2248,10 @@ struct msm_gpu *a6xx_gpu_init(struct drm_device *dev) > if (adreno_is_a618(adreno_gpu) || adreno_is_7c3(adreno_gpu)) > priv->gpu_clamp_to_idle = true; > > - /* Check if there is a GMU phandle and set it up */ > - node = of_parse_phandle(pdev->dev.of_node, "qcom,gmu", 0); > - > - /* FIXME: How do we gracefully handle this? */ > - BUG_ON(!node); > - > - ret = a6xx_gmu_init(a6xx_gpu, node); > + if (adreno_has_gmu_wrapper(adreno_gpu)) > + ret = a6xx_gmu_wrapper_init(a6xx_gpu, node); > + else > + ret = a6xx_gmu_init(a6xx_gpu, node); > of_node_put(node); > if (ret) { > a6xx_destroy(&(a6xx_gpu->base.base)); > diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.h > b/drivers/gpu/drm/msm/adreno/a6xx_gpu.h > index aa70390ee1c6..c788b06e72da 100644 > --- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.h > +++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.h > @@ -76,6 +76,7 @@ int a6xx_gmu_set_oob(struct a6xx_gmu *gmu, enum > a6xx_gmu_oob_state state); > void a6xx_gmu_clear_oob(struct a6xx_gmu *gmu, enum a6xx_gmu_oob_state state); > > int a6xx_gmu_init(struct a6xx_gpu *a6xx_gpu, struct device_node *node); > +int a6xx_gmu_wrapper_init(struct a6xx_gpu *a6xx_gpu, struct device_node > *node); > void a6xx_gmu_remove(struct a6xx_gpu *a6xx_gpu); > > void a6xx_gmu_set_freq(struct msm_gpu *gpu, struct dev_pm_opp *opp, > diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c > b/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c > index 30ecdff363e7..4e5d650578c6 100644 > --- a/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c > +++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c > @@ -1041,16 +1041,18 @@ struct msm_gpu_state *a6xx_gpu_state_get(struct > msm_gpu *gpu) > /* Get the generic state from the adreno core */ > adreno_gpu_state_get(gpu, &a6xx_state->base); > > - a6xx_get_gmu_registers(gpu, a6xx_state); > + if (!adreno_has_gmu_wrapper(adreno_gpu)) { > + a6xx_get_gmu_registers(gpu, a6xx_state); > > - a6xx_state->gmu_log = a6xx_snapshot_gmu_bo(a6xx_state, > &a6xx_gpu->gmu.log); > - a6xx_state->gmu_hfi = a6xx_snapshot_gmu_bo(a6xx_state, > &a6xx_gpu->gmu.hfi); > - a6xx_state->gmu_debug = a6xx_snapshot_gmu_bo(a6xx_state, > &a6xx_gpu->gmu.debug); > + a6xx_state->gmu_log = a6xx_snapshot_gmu_bo(a6xx_state, > &a6xx_gpu->gmu.log); > + a6xx_state->gmu_hfi = a6xx_snapshot_gmu_bo(a6xx_state, > &a6xx_gpu->gmu.hfi); > + a6xx_state->gmu_debug = a6xx_snapshot_gmu_bo(a6xx_state, > &a6xx_gpu->gmu.debug); > / > - a6xx_snapshot_gmu_hfi_history(gpu, a6xx_state); > + a6xx_snapshot_gmu_hfi_history(gpu, a6xx_state); > + } > > /* If GX isn't on the rest of the data isn't going to be accessible */ > - if (!a6xx_gmu_gx_is_on(&a6xx_gpu->gmu)) > + if (!adreno_has_gmu_wrapper(adreno_gpu) && > !a6xx_gmu_gx_is_on(&a6xx_gpu->gmu)) > return &a6xx_state->base; > > /* Get the banks of indexed registers */ > diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c > b/drivers/gpu/drm/msm/adreno/adreno_gpu.c > index 6934cee07d42..5c5901d65950 100644 > --- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c > +++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c > @@ -528,6 +528,10 @@ int adreno_load_fw(struct adreno_gpu *adreno_gpu) > if (!adreno_gpu->info->fw[i]) > continue; > > + /* Skip loading GMU firwmare with GMU Wrapper */ > + if (adreno_has_gmu_wrapper(adreno_gpu) && i == ADRENO_FW_GMU) > + continue; > + > /* Skip if the firmware has already been loaded */ > if (adreno_gpu->fw[i]) > continue; > @@ -1074,8 +1078,8 @@ int adreno_gpu_init(struct drm_device *drm, struct > platform_device *pdev, > u32 speedbin; > int ret; > > - /* Only handle the core clock when GMU is not in use */ > - if (config->rev.core < 6) { > + /* Only handle the core clock when GMU is not in use (or is absent). */ > + if (adreno_has_gmu_wrapper(adreno_gpu) || config->rev.core < 6) { > /* > * This can only be done before devm_pm_opp_of_add_table(), or > * dev_pm_opp_set_config() will WARN_ON() > diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.h > b/drivers/gpu/drm/msm/adreno/adreno_gpu.h > index f62612a5c70f..ee5352bc5329 100644 > --- a/drivers/gpu/drm/msm/adreno/adreno_gpu.h > +++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.h > @@ -115,6 +115,7 @@ struct adreno_gpu { > * code (a3xx_gpu.c) and stored in this common location. > */ > const unsigned int *reg_offsets; > + bool gmu_is_wrapper; > }; > #define to_adreno_gpu(x) container_of(x, struct adreno_gpu, base) > > @@ -145,6 +146,11 @@ struct adreno_platform_config { > > bool adreno_cmp_rev(struct adreno_rev rev1, struct adreno_rev rev2); > > +static inline bool adreno_has_gmu_wrapper(struct adreno_gpu *gpu) > +{ > + return gpu->gmu_is_wrapper; > +} > + > static inline bool adreno_is_a2xx(struct adreno_gpu *gpu) > { > return (gpu->revn < 300); > > -- > 2.40.1 > I am still not fully onboard with the idea of gmu_wrapper node in devicetree. Aside from that, I don't see any other issue. Please check the few comments I left. -Akhil.