drm/msm/dsi: free TX buffer in unbind

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If the drm/msm init code gets an error during output modeset
initialisation, the kernel will report an error regarding DRM memory
manager not being clean during shutdown. This is because
msm_dsi_modeset_init() allocates a piece of GEM memory for the TX
buffer, but destruction of the buffer happens only at
msm_dsi_host_destroy(), which is called during DSI driver's remove()
time, much later than the DRM MM shutdown.

To solve this issue, move the TX buffer destruction to dsi_unbind(), so
that the buffer is destructed at the correct time. Note, we also have to
store a reference to the address space, because priv->kms->aspace is
cleared before components are unbound.

Reported-by: Bjorn Andersson <andersson@kernel.org>
Fixes: 8f59ee9a57 ("drm/msm/dsi: Adjust probe order")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/562238/
Signed-off-by: Rob Clark <robdclark@chromium.org>

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This commit is contained in:

Dmitry Baryshkov 2023-10-12 04:29:09 +03:00 • committed by Rob Clark

parent 69b321b2c3

commit 5e05be7826

3 changed files with 11 additions and 6 deletions

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1

drivers/gpu/drm/msm/dsi/dsi.c

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1

drivers/gpu/drm/msm/dsi/dsi.h

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15

drivers/gpu/drm/msm/dsi/dsi_host.c

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