On Thu, 5 May 2022 at 01:49, Douglas Anderson dianders@chromium.org wrote:
When rebooting on my sc7280-herobrine based device, I got a crash. Upon debugging, I found that I was in msm_drv_shutdown() and my "pdev" was the one associated with mdss_probe().
From source, I found that mdss_probe() has the line: platform_set_drvdata(pdev, mdss); ...where "mdss" is of type "struct msm_mdss *".
Also from source, I saw that in msm_drv_shutdown() we have the line: struct msm_drm_private *priv = platform_get_drvdata(pdev);
This is a mismatch and is the root of the problem.
Further digging made it apparent that msm_drv_shutdown() is only supposed to be used for parts of the msm display framework that also call msm_drv_probe() but mdss_probe() doesn't call msm_drv_probe(). Let's remove the shutdown functon from msm_mdss.c.
Digging a little further, code inspection found that two drivers that use msm_drv_probe() weren't calling msm_drv_shutdown(). Let's add it to them.
Fixes: ecb23f2e3009 ("drm/msm: split the main platform driver")
More likely: Fixes: 6874f48bb8b0 ("drm/msm: make mdp5/dpu devices master components")
With that fixed: Reviewed-by: Dmitry Baryshkov dmitry.baryshkov@linaro.org
Signed-off-by: Douglas Anderson dianders@chromium.org
drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 1 + drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c | 1 + drivers/gpu/drm/msm/msm_mdss.c | 1 - 3 files changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c index 143d6643be53..2b9d931474e0 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c @@ -1350,6 +1350,7 @@ MODULE_DEVICE_TABLE(of, dpu_dt_match); static struct platform_driver dpu_driver = { .probe = dpu_dev_probe, .remove = dpu_dev_remove,
.shutdown = msm_drv_shutdown, .driver = { .name = "msm_dpu", .of_match_table = dpu_dt_match,diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c index 9b7bbc3adb97..3d5621a68f85 100644 --- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c +++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c @@ -1009,6 +1009,7 @@ MODULE_DEVICE_TABLE(of, mdp5_dt_match); static struct platform_driver mdp5_driver = { .probe = mdp5_dev_probe, .remove = mdp5_dev_remove,
.shutdown = msm_drv_shutdown, .driver = { .name = "msm_mdp", .of_match_table = mdp5_dt_match,diff --git a/drivers/gpu/drm/msm/msm_mdss.c b/drivers/gpu/drm/msm/msm_mdss.c index 20f154dda9cf..0454a571adf7 100644 --- a/drivers/gpu/drm/msm/msm_mdss.c +++ b/drivers/gpu/drm/msm/msm_mdss.c @@ -397,7 +397,6 @@ MODULE_DEVICE_TABLE(of, mdss_dt_match); static struct platform_driver mdss_platform_driver = { .probe = mdss_probe, .remove = mdss_remove,
.shutdown = msm_drv_shutdown, .driver = { .name = "msm-mdss", .of_match_table = mdss_dt_match,-- 2.36.0.464.gb9c8b46e94-goog