drm/amd/display: don't clean-up bottom pipe plane_state

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In the scenario of setting underlay, dc_validate_global_state()
is called after constructing the context with all
relevant bottom_pipe related configurations in dm_update_planes_state().

Currently, in dc_validate_global_state(), without checking for bottom_pipe's
existence, the pipe_ctx structure is initialised to 0, hence
nullyfying the plane_state of bottom_pipe which shall be accessed
in populate_initial_data() called from bw_calcs().

Due to this null pointer access kernel panics and leads to reboot
when underlay is tried to set.

This patch fixes the issue by no longer clearing the top_pipe. This
workaround is no longer required.

Signed-off-by: Shirish S <shirish.s@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Shirish S 2017-09-26 12:26:41 +05:30 • committed by Alex Deucher

parent 4a6cee2ca1

commit 2c8f195adf

1 changed files with 0 additions and 8 deletions

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drivers/gpu/drm/amd/display/dc/core/dc_resource.c

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