[PATCH v2] drm/msm/mdp5: stop overriding drvdata
Abhinav Kumar
quic_abhinavk at quicinc.com
Fri Oct 21 21:58:31 UTC 2022
Hi Dmitry
A couple of comments below.
On 10/21/2022 12:26 PM, Dmitry Baryshkov wrote:
> The rest of the code expects that master's device drvdata is the
> struct msm_drm_private instance. Do not override the mdp5's drvdata.
>
> Fixes: 6874f48bb8b0 ("drm/msm: make mdp5/dpu devices master components")
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov at linaro.org>
> Reviewed-by: Abhinav Kumar <quic_abhinavk at quicinc.com>
> ---
> Abhinav, Rob, please pick this for -fixes.
>
> This is an updated version of [1]. Fixed the read_mdp_hw_revision()
> function. PM runtime isn't available at the moment, as priv->kms is not
> set.
Can you split them into two changes?
Any reason fixing the read_mdp_hw_revision() needs to be in this?
>
> [1] https://patchwork.freedesktop.org/patch/490326/?series=105392&rev=1
>
> ---
> drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c | 37 ++++++++++++++----------
> 1 file changed, 22 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
> index b0d21838a134..506c64940972 100644
> --- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
> +++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
> @@ -203,7 +203,7 @@ static int mdp5_set_split_display(struct msm_kms *kms,
> slave_encoder);
> }
>
> -static void mdp5_destroy(struct platform_device *pdev);
> +static void mdp5_destroy(struct mdp5_kms *mdp5_kms);
>
> static void mdp5_kms_destroy(struct msm_kms *kms)
> {
> @@ -223,7 +223,7 @@ static void mdp5_kms_destroy(struct msm_kms *kms)
> }
>
> mdp_kms_destroy(&mdp5_kms->base);
> - mdp5_destroy(mdp5_kms->pdev);
> + mdp5_destroy(mdp5_kms);
> }
>
> #ifdef CONFIG_DEBUG_FS
> @@ -519,9 +519,15 @@ static void read_mdp_hw_revision(struct mdp5_kms *mdp5_kms,
> struct device *dev = &mdp5_kms->pdev->dev;
> u32 version;
>
> - pm_runtime_get_sync(dev);
> + /* Manually enable the MDP5, as pm runtime isn't usable yet */
> + if (mdp5_enable(mdp5_kms)) {
mdp5_enable() always seems to return 0 so do we need this if block?
> + *major = 0;
> + *minor = 0;
> + return;
> + }
> +
> version = mdp5_read(mdp5_kms, REG_MDP5_HW_VERSION);
> - pm_runtime_put_sync(dev);
> + mdp5_disable(mdp5_kms);
>
> *major = FIELD(version, MDP5_HW_VERSION_MAJOR);
> *minor = FIELD(version, MDP5_HW_VERSION_MINOR);
> @@ -559,6 +565,8 @@ static int mdp5_kms_init(struct drm_device *dev)
> int irq, i, ret;
>
> ret = mdp5_init(to_platform_device(dev->dev), dev);
> + if (ret)
> + return ret;
>
> /* priv->kms would have been populated by the MDP5 driver */
> kms = priv->kms;
> @@ -632,9 +640,8 @@ static int mdp5_kms_init(struct drm_device *dev)
> return ret;
> }
>
> -static void mdp5_destroy(struct platform_device *pdev)
> +static void mdp5_destroy(struct mdp5_kms *mdp5_kms)
> {
> - struct mdp5_kms *mdp5_kms = platform_get_drvdata(pdev);
> int i;
>
> if (mdp5_kms->ctlm)
> @@ -648,7 +655,7 @@ static void mdp5_destroy(struct platform_device *pdev)
> kfree(mdp5_kms->intfs[i]);
>
> if (mdp5_kms->rpm_enabled)
> - pm_runtime_disable(&pdev->dev);
> + pm_runtime_disable(&mdp5_kms->pdev->dev);
>
> drm_atomic_private_obj_fini(&mdp5_kms->glob_state);
> drm_modeset_lock_fini(&mdp5_kms->glob_state_lock);
> @@ -797,8 +804,6 @@ static int mdp5_init(struct platform_device *pdev, struct drm_device *dev)
> goto fail;
> }
>
> - platform_set_drvdata(pdev, mdp5_kms);
> -
> spin_lock_init(&mdp5_kms->resource_lock);
>
> mdp5_kms->dev = dev;
> @@ -839,9 +844,6 @@ static int mdp5_init(struct platform_device *pdev, struct drm_device *dev)
> */
> clk_set_rate(mdp5_kms->core_clk, 200000000);
>
> - pm_runtime_enable(&pdev->dev);
> - mdp5_kms->rpm_enabled = true;
> -
> read_mdp_hw_revision(mdp5_kms, &major, &minor);
>
> mdp5_kms->cfg = mdp5_cfg_init(mdp5_kms, major, minor);
> @@ -893,10 +895,13 @@ static int mdp5_init(struct platform_device *pdev, struct drm_device *dev)
> /* set uninit-ed kms */
> priv->kms = &mdp5_kms->base.base;
>
> + pm_runtime_enable(&pdev->dev);
> + mdp5_kms->rpm_enabled = true;
> +
> return 0;
> fail:
> if (mdp5_kms)
> - mdp5_destroy(pdev);
> + mdp5_destroy(mdp5_kms);
> return ret;
> }
>
> @@ -953,7 +958,8 @@ static int mdp5_dev_remove(struct platform_device *pdev)
> static __maybe_unused int mdp5_runtime_suspend(struct device *dev)
> {
> struct platform_device *pdev = to_platform_device(dev);
> - struct mdp5_kms *mdp5_kms = platform_get_drvdata(pdev);
> + struct msm_drm_private *priv = platform_get_drvdata(pdev);
> + struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(priv->kms));
>
> DBG("");
>
> @@ -963,7 +969,8 @@ static __maybe_unused int mdp5_runtime_suspend(struct device *dev)
> static __maybe_unused int mdp5_runtime_resume(struct device *dev)
> {
> struct platform_device *pdev = to_platform_device(dev);
> - struct mdp5_kms *mdp5_kms = platform_get_drvdata(pdev);
> + struct msm_drm_private *priv = platform_get_drvdata(pdev);
> + struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(priv->kms));
>
> DBG("");
>
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