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@xxxxxxxxxx>
Reviewed-by: Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx>
---
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("");
