| Message ID | 1603113558-23330-2-git-send-email-akhilpo@codeaurora.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [1/2] drm/msm: Implement shutdown callback for adreno | expand |
On 10/19/2020 8:29 PM, Jordan Crouse wrote: > On Mon, Oct 19, 2020 at 06:49:18PM +0530, Akhil P Oommen wrote: >> On targets with a6xx gpu, there is a duplicate gpu icc node listed in >> the interconnect summary. On these targets, calling > > This first sentence is confusing to me. I think the following few sentences do > a better job of explaining what you are trying to do. I can just remove that line. > >> dev_pm_opp_of_add_table() api initializes the icc nodes for gpu indirectly. >> So we should avoid using of_icc_get() api in the common probe path. To fix >> this, we can move of_icc_get() to target specific code where it is >> required. > >> Signed-off-by: Akhil P Oommen <akhilpo@codeaurora.org> >> --- >> drivers/gpu/drm/msm/adreno/a3xx_gpu.c | 21 +++++++++++++++++++-- >> drivers/gpu/drm/msm/adreno/a4xx_gpu.c | 20 ++++++++++++++++++-- >> drivers/gpu/drm/msm/adreno/adreno_gpu.c | 29 +---------------------------- >> 3 files changed, 38 insertions(+), 32 deletions(-) >> >> diff --git a/drivers/gpu/drm/msm/adreno/a3xx_gpu.c b/drivers/gpu/drm/msm/adreno/a3xx_gpu.c >> index f29c77d..93da668 100644 >> --- a/drivers/gpu/drm/msm/adreno/a3xx_gpu.c >> +++ b/drivers/gpu/drm/msm/adreno/a3xx_gpu.c >> @@ -519,6 +519,8 @@ struct msm_gpu *a3xx_gpu_init(struct drm_device *dev) >> struct msm_gpu *gpu; >> struct msm_drm_private *priv = dev->dev_private; >> struct platform_device *pdev = priv->gpu_pdev; >> + struct icc_path *ocmem_icc_path; >> + struct icc_path *icc_path; >> int ret; >> >> if (!pdev) { >> @@ -566,13 +568,28 @@ struct msm_gpu *a3xx_gpu_init(struct drm_device *dev) >> goto fail; >> } >> >> + icc_path = devm_of_icc_get(&pdev->dev, "gfx-mem"); >> + ret = IS_ERR(icc_path); >> + if (ret) >> + goto fail; >> + >> + ocmem_icc_path = devm_of_icc_get(&pdev->dev, "ocmem"); >> + ret = IS_ERR(ocmem_icc_path); >> + if (ret) { >> + /* allow -ENODATA, ocmem icc is optional */ >> + if (ret != -ENODATA) >> + goto fail; >> + ocmem_icc_path = NULL; >> + } >> + >> + >> /* >> * Set the ICC path to maximum speed for now by multiplying the fastest >> * frequency by the bus width (8). We'll want to scale this later on to >> * improve battery life. >> */ >> - icc_set_bw(gpu->icc_path, 0, Bps_to_icc(gpu->fast_rate) * 8); >> - icc_set_bw(gpu->ocmem_icc_path, 0, Bps_to_icc(gpu->fast_rate) * 8); >> + icc_set_bw(icc_path, 0, Bps_to_icc(gpu->fast_rate) * 8); >> + icc_set_bw(ocmem_icc_path, 0, Bps_to_icc(gpu->fast_rate) * 8); > > This seems reasonable but I hope we can get somebody to sign off on a real a3xx > part. > >> >> return gpu; >> >> diff --git a/drivers/gpu/drm/msm/adreno/a4xx_gpu.c b/drivers/gpu/drm/msm/adreno/a4xx_gpu.c >> index 2b93b33..c0be3a0 100644 >> --- a/drivers/gpu/drm/msm/adreno/a4xx_gpu.c >> +++ b/drivers/gpu/drm/msm/adreno/a4xx_gpu.c >> @@ -648,6 +648,8 @@ struct msm_gpu *a4xx_gpu_init(struct drm_device *dev) >> struct msm_gpu *gpu; >> struct msm_drm_private *priv = dev->dev_private; >> struct platform_device *pdev = priv->gpu_pdev; >> + struct icc_path *ocmem_icc_path; >> + struct icc_path *icc_path; >> int ret; >> >> if (!pdev) { >> @@ -694,13 +696,27 @@ struct msm_gpu *a4xx_gpu_init(struct drm_device *dev) >> goto fail; >> } >> >> + icc_path = devm_of_icc_get(&pdev->dev, "gfx-mem"); >> + ret = IS_ERR(icc_path); >> + if (ret) >> + goto fail; >> + >> + ocmem_icc_path = devm_of_icc_get(&pdev->dev, "ocmem"); >> + ret = IS_ERR(ocmem_icc_path); >> + if (ret) { >> + /* allow -ENODATA, ocmem icc is optional */ >> + if (ret != -ENODATA) >> + goto fail; >> + ocmem_icc_path = NULL; >> + } >> + >> /* >> * Set the ICC path to maximum speed for now by multiplying the fastest >> * frequency by the bus width (8). We'll want to scale this later on to >> * improve battery life. >> */ >> - icc_set_bw(gpu->icc_path, 0, Bps_to_icc(gpu->fast_rate) * 8); >> - icc_set_bw(gpu->ocmem_icc_path, 0, Bps_to_icc(gpu->fast_rate) * 8); >> + icc_set_bw(icc_path, 0, Bps_to_icc(gpu->fast_rate) * 8); >> + icc_set_bw(ocmem_icc_path, 0, Bps_to_icc(gpu->fast_rate) * 8); > > Less confident we can find any 4xx fans to test this, but if a3xx works then so > should this (in theory). > >> return gpu; >> >> diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c >> index fd8f491..6e3b820 100644 >> --- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c >> +++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c >> @@ -920,35 +920,8 @@ int adreno_gpu_init(struct drm_device *drm, struct platform_device *pdev, >> >> ret = msm_gpu_init(drm, pdev, &adreno_gpu->base, &funcs->base, >> adreno_gpu->info->name, &adreno_gpu_config); >> - if (ret) >> - return ret; >> - >> - /* >> - * The legacy case, before "interconnect-names", only has a >> - * single interconnect path which is equivalent to "gfx-mem" >> - */ >> - if (!of_find_property(dev->of_node, "interconnect-names", NULL)) { >> - gpu->icc_path = of_icc_get(dev, NULL); >> - } else { >> - gpu->icc_path = of_icc_get(dev, "gfx-mem"); >> - gpu->ocmem_icc_path = of_icc_get(dev, "ocmem"); >> - } >> >> - if (IS_ERR(gpu->icc_path)) { >> - ret = PTR_ERR(gpu->icc_path); >> - gpu->icc_path = NULL; >> - return ret; >> - } >> - >> - if (IS_ERR(gpu->ocmem_icc_path)) { >> - ret = PTR_ERR(gpu->ocmem_icc_path); >> - gpu->ocmem_icc_path = NULL; >> - /* allow -ENODATA, ocmem icc is optional */ >> - if (ret != -ENODATA) >> - return ret; >> - } >> - >> - return 0; >> + return ret; > > This could go even further: > > return msm_gpu_init(...); > Yep, we can do that. Thanks for the feedback. --Akhil >> } >> >> void adreno_gpu_cleanup(struct adreno_gpu *adreno_gpu) >> -- >> 2.7.4 >> >
diff --git a/drivers/gpu/drm/msm/adreno/a3xx_gpu.c b/drivers/gpu/drm/msm/adreno/a3xx_gpu.c index f29c77d..93da668 100644 --- a/drivers/gpu/drm/msm/adreno/a3xx_gpu.c +++ b/drivers/gpu/drm/msm/adreno/a3xx_gpu.c @@ -519,6 +519,8 @@ struct msm_gpu *a3xx_gpu_init(struct drm_device *dev) struct msm_gpu *gpu; struct msm_drm_private *priv = dev->dev_private; struct platform_device *pdev = priv->gpu_pdev; + struct icc_path *ocmem_icc_path; + struct icc_path *icc_path; int ret; if (!pdev) { @@ -566,13 +568,28 @@ struct msm_gpu *a3xx_gpu_init(struct drm_device *dev) goto fail; } + icc_path = devm_of_icc_get(&pdev->dev, "gfx-mem"); + ret = IS_ERR(icc_path); + if (ret) + goto fail; + + ocmem_icc_path = devm_of_icc_get(&pdev->dev, "ocmem"); + ret = IS_ERR(ocmem_icc_path); + if (ret) { + /* allow -ENODATA, ocmem icc is optional */ + if (ret != -ENODATA) + goto fail; + ocmem_icc_path = NULL; + } + + /* * Set the ICC path to maximum speed for now by multiplying the fastest * frequency by the bus width (8). We'll want to scale this later on to * improve battery life. */ - icc_set_bw(gpu->icc_path, 0, Bps_to_icc(gpu->fast_rate) * 8); - icc_set_bw(gpu->ocmem_icc_path, 0, Bps_to_icc(gpu->fast_rate) * 8); + icc_set_bw(icc_path, 0, Bps_to_icc(gpu->fast_rate) * 8); + icc_set_bw(ocmem_icc_path, 0, Bps_to_icc(gpu->fast_rate) * 8); return gpu; diff --git a/drivers/gpu/drm/msm/adreno/a4xx_gpu.c b/drivers/gpu/drm/msm/adreno/a4xx_gpu.c index 2b93b33..c0be3a0 100644 --- a/drivers/gpu/drm/msm/adreno/a4xx_gpu.c +++ b/drivers/gpu/drm/msm/adreno/a4xx_gpu.c @@ -648,6 +648,8 @@ struct msm_gpu *a4xx_gpu_init(struct drm_device *dev) struct msm_gpu *gpu; struct msm_drm_private *priv = dev->dev_private; struct platform_device *pdev = priv->gpu_pdev; + struct icc_path *ocmem_icc_path; + struct icc_path *icc_path; int ret; if (!pdev) { @@ -694,13 +696,27 @@ struct msm_gpu *a4xx_gpu_init(struct drm_device *dev) goto fail; } + icc_path = devm_of_icc_get(&pdev->dev, "gfx-mem"); + ret = IS_ERR(icc_path); + if (ret) + goto fail; + + ocmem_icc_path = devm_of_icc_get(&pdev->dev, "ocmem"); + ret = IS_ERR(ocmem_icc_path); + if (ret) { + /* allow -ENODATA, ocmem icc is optional */ + if (ret != -ENODATA) + goto fail; + ocmem_icc_path = NULL; + } + /* * Set the ICC path to maximum speed for now by multiplying the fastest * frequency by the bus width (8). We'll want to scale this later on to * improve battery life. */ - icc_set_bw(gpu->icc_path, 0, Bps_to_icc(gpu->fast_rate) * 8); - icc_set_bw(gpu->ocmem_icc_path, 0, Bps_to_icc(gpu->fast_rate) * 8); + icc_set_bw(icc_path, 0, Bps_to_icc(gpu->fast_rate) * 8); + icc_set_bw(ocmem_icc_path, 0, Bps_to_icc(gpu->fast_rate) * 8); return gpu; diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c index fd8f491..6e3b820 100644 --- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c +++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c @@ -920,35 +920,8 @@ int adreno_gpu_init(struct drm_device *drm, struct platform_device *pdev, ret = msm_gpu_init(drm, pdev, &adreno_gpu->base, &funcs->base, adreno_gpu->info->name, &adreno_gpu_config); - if (ret) - return ret; - - /* - * The legacy case, before "interconnect-names", only has a - * single interconnect path which is equivalent to "gfx-mem" - */ - if (!of_find_property(dev->of_node, "interconnect-names", NULL)) { - gpu->icc_path = of_icc_get(dev, NULL); - } else { - gpu->icc_path = of_icc_get(dev, "gfx-mem"); - gpu->ocmem_icc_path = of_icc_get(dev, "ocmem"); - } - if (IS_ERR(gpu->icc_path)) { - ret = PTR_ERR(gpu->icc_path); - gpu->icc_path = NULL; - return ret; - } - - if (IS_ERR(gpu->ocmem_icc_path)) { - ret = PTR_ERR(gpu->ocmem_icc_path); - gpu->ocmem_icc_path = NULL; - /* allow -ENODATA, ocmem icc is optional */ - if (ret != -ENODATA) - return ret; - } - - return 0; + return ret; } void adreno_gpu_cleanup(struct adreno_gpu *adreno_gpu)
On targets with a6xx gpu, there is a duplicate gpu icc node listed in the interconnect summary. On these targets, calling dev_pm_opp_of_add_table() api initializes the icc nodes for gpu indirectly. So we should avoid using of_icc_get() api in the common probe path. To fix this, we can move of_icc_get() to target specific code where it is required. Signed-off-by: Akhil P Oommen <akhilpo@codeaurora.org> --- drivers/gpu/drm/msm/adreno/a3xx_gpu.c | 21 +++++++++++++++++++-- drivers/gpu/drm/msm/adreno/a4xx_gpu.c | 20 ++++++++++++++++++-- drivers/gpu/drm/msm/adreno/adreno_gpu.c | 29 +---------------------------- 3 files changed, 38 insertions(+), 32 deletions(-)