On 8/24/2022 1:29 AM, Dmitry Baryshkov wrote:
On Wed, 24 Aug 2022 at 04:25, Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx> wrote:
On 6/20/2022 2:30 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@xxxxxxxxxx>
Is this just for consistency across mdp5/dpu drivers?
What issue was seen if mdp5's platform data is overwritten?
I think there was a crash in mdp5_destroy, but I did not capture the
log at the moment.
As you can see, the mdp5_destroy() expects to get mdp5_kms pointer
from the drvdata. However the msm_drv_probe sets the drvdata to
msm_drm_private instance. Boom.
Yes, I see that msm_drv_probe sets the drvdata to msm_drm_private.
But I also see that mdp5_init then sets it to
platform_set_drvdata(pdev, mdp5_kms);
Does this not override it then?
Also seems like the commit which introduced it is present since april,
this should have happened even earlier then right?
---
drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c | 19 +++++++++----------
1 file changed, 9 insertions(+), 10 deletions(-)
diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
index c668a4b27cc6..daf5b5ca7233 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
@@ -651,9 +651,8 @@ 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)
@@ -667,7 +666,7 @@ 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);
@@ -816,8 +815,6 @@ 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;
@@ -915,7 +912,7 @@ static int mdp5_init(struct platform_device *pdev, struct drm_device *dev)
return 0;
fail:
if (mdp5_kms)
- mdp5_destroy(pdev);
+ mdp5_destroy(mdp5_kms);
return ret;
}
@@ -975,7 +972,8 @@ 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("");
@@ -985,7 +983,8 @@ 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("");
