Date:   Tue, 1 Sep 2020 08:53:50 -0700
From:   Rob Clark <robdclark@...il.com>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     dri-devel <dri-devel@...ts.freedesktop.org>,
        "list@....net:IOMMU DRIVERS <iommu@...ts.linux-foundation.org>, Joerg
        Roedel <joro@...tes.org>," <iommu@...ts.linux-foundation.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>,
        Will Deacon <will@...nel.org>,
        freedreno <freedreno@...ts.freedesktop.org>,
        Sibi Sankar <sibis@...eaurora.org>,
        Vivek Gautam <vivek.gautam@...eaurora.org>,
        Stephen Boyd <swboyd@...omium.org>,
        Robin Murphy <robin.murphy@....com>,
        Joerg Roedel <joro@...tes.org>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        Rob Clark <robdclark@...omium.org>,
        Sean Paul <sean@...rly.run>, David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Jordan Crouse <jcrouse@...eaurora.org>,
        Jonathan Marek <jonathan@...ek.ca>,
        Sharat Masetty <smasetty@...eaurora.org>,
        Shawn Guo <shawn.guo@...aro.org>,
        AngeloGioacchino Del Regno <kholk11@...il.com>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 06/19] drm/msm/gpu: add dev_to_gpu() helper

On Mon, Aug 31, 2020 at 9:32 PM Bjorn Andersson
<bjorn.andersson@...aro.org> wrote:
>
> On Thu 13 Aug 21:41 CDT 2020, Rob Clark wrote:
>
> > From: Rob Clark <robdclark@...omium.org>
> >
> > In a later patch, the drvdata will not directly be 'struct msm_gpu *',
> > so add a helper to reduce the churn.
> >
> > Signed-off-by: Rob Clark <robdclark@...omium.org>
> > ---
> >  drivers/gpu/drm/msm/adreno/adreno_device.c | 10 ++++------
> >  drivers/gpu/drm/msm/msm_gpu.c              |  6 +++---
> >  drivers/gpu/drm/msm/msm_gpu.h              |  5 +++++
> >  3 files changed, 12 insertions(+), 9 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/msm/adreno/adreno_device.c b/drivers/gpu/drm/msm/adreno/adreno_device.c
> > index 9eeb46bf2a5d..26664e1b30c0 100644
> > --- a/drivers/gpu/drm/msm/adreno/adreno_device.c
> > +++ b/drivers/gpu/drm/msm/adreno/adreno_device.c
> > @@ -282,7 +282,7 @@ struct msm_gpu *adreno_load_gpu(struct drm_device *dev)
> >       int ret;
> >
> >       if (pdev)
> > -             gpu = platform_get_drvdata(pdev);
> > +             gpu = dev_to_gpu(&pdev->dev);
> >
> >       if (!gpu) {
> >               dev_err_once(dev->dev, "no GPU device was found\n");
> > @@ -425,7 +425,7 @@ static int adreno_bind(struct device *dev, struct device *master, void *data)
> >  static void adreno_unbind(struct device *dev, struct device *master,
> >               void *data)
> >  {
> > -     struct msm_gpu *gpu = dev_get_drvdata(dev);
> > +     struct msm_gpu *gpu = dev_to_gpu(dev);
> >
> >       pm_runtime_force_suspend(dev);
> >       gpu->funcs->destroy(gpu);
> > @@ -490,16 +490,14 @@ static const struct of_device_id dt_match[] = {
> >  #ifdef CONFIG_PM
> >  static int adreno_resume(struct device *dev)
> >  {
> > -     struct platform_device *pdev = to_platform_device(dev);
> > -     struct msm_gpu *gpu = platform_get_drvdata(pdev);
> > +     struct msm_gpu *gpu = dev_to_gpu(dev);
> >
> >       return gpu->funcs->pm_resume(gpu);
> >  }
> >
> >  static int adreno_suspend(struct device *dev)
> >  {
> > -     struct platform_device *pdev = to_platform_device(dev);
> > -     struct msm_gpu *gpu = platform_get_drvdata(pdev);
> > +     struct msm_gpu *gpu = dev_to_gpu(dev);
> >
> >       return gpu->funcs->pm_suspend(gpu);
> >  }
> > diff --git a/drivers/gpu/drm/msm/msm_gpu.c b/drivers/gpu/drm/msm/msm_gpu.c
> > index d5645472b25d..6aa9e04e52e7 100644
> > --- a/drivers/gpu/drm/msm/msm_gpu.c
> > +++ b/drivers/gpu/drm/msm/msm_gpu.c
> > @@ -24,7 +24,7 @@
> >  static int msm_devfreq_target(struct device *dev, unsigned long *freq,
> >               u32 flags)
> >  {
> > -     struct msm_gpu *gpu = platform_get_drvdata(to_platform_device(dev));
> > +     struct msm_gpu *gpu = dev_to_gpu(dev);
> >       struct dev_pm_opp *opp;
> >
> >       opp = devfreq_recommended_opp(dev, freq, flags);
> > @@ -45,7 +45,7 @@ static int msm_devfreq_target(struct device *dev, unsigned long *freq,
> >  static int msm_devfreq_get_dev_status(struct device *dev,
> >               struct devfreq_dev_status *status)
> >  {
> > -     struct msm_gpu *gpu = platform_get_drvdata(to_platform_device(dev));
> > +     struct msm_gpu *gpu = dev_to_gpu(dev);
> >       ktime_t time;
> >
> >       if (gpu->funcs->gpu_get_freq)
> > @@ -64,7 +64,7 @@ static int msm_devfreq_get_dev_status(struct device *dev,
> >
> >  static int msm_devfreq_get_cur_freq(struct device *dev, unsigned long *freq)
> >  {
> > -     struct msm_gpu *gpu = platform_get_drvdata(to_platform_device(dev));
> > +     struct msm_gpu *gpu = dev_to_gpu(dev);
> >
> >       if (gpu->funcs->gpu_get_freq)
> >               *freq = gpu->funcs->gpu_get_freq(gpu);
> > diff --git a/drivers/gpu/drm/msm/msm_gpu.h b/drivers/gpu/drm/msm/msm_gpu.h
> > index 0db117a7339b..8bda7beaed4b 100644
> > --- a/drivers/gpu/drm/msm/msm_gpu.h
> > +++ b/drivers/gpu/drm/msm/msm_gpu.h
> > @@ -141,6 +141,11 @@ struct msm_gpu {
> >       struct msm_gpu_state *crashstate;
> >  };
> >
> > +static inline struct msm_gpu *dev_to_gpu(struct device *dev)
>
> That's a fairly generic name for a driver-global helper :)

tbf, it is only global to the gpu part of the driver..

thanks for the review

BR,
-R

> Reviewed-by: Bjorn Andersson <bjorn.andersson@...aro.org>
>
> Regards,
> Bjorn
>
> > +{
> > +     return dev_get_drvdata(dev);
> > +}
> > +
> >  /* It turns out that all targets use the same ringbuffer size */
> >  #define MSM_GPU_RINGBUFFER_SZ SZ_32K
> >  #define MSM_GPU_RINGBUFFER_BLKSIZE 32
> > --
> > 2.26.2
> >

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