mirror of
https://github.com/raspberrypi/linux.git
synced 2025-12-15 14:32:06 +00:00
ed6941b632
[why] We mistakenly toggle dpms state for non master pipe when handling link lost. A non master pipe doesn't connect to a backend. So it is toggling dpms for non master is undefined and caused NULL pointer dereference. [how] Add helper functions to find an array of active master pipes for current link and only toggle DPMS for active master pipes connected to the link. Add assert in case we get called to program dpms with non master pipe. Reviewed-by: Alvin Lee <Alvin.Lee2@amd.com> Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com> Signed-off-by: Wenjing Liu <wenjing.liu@amd.com> Tested-by: Daniel Wheeler <daniel.wheeler@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
41 lines
1.7 KiB
C
41 lines
1.7 KiB
C
/*
|
|
* Copyright 2023 Advanced Micro Devices, Inc.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
|
|
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
|
|
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
|
|
* OTHER DEALINGS IN THE SOFTWARE.
|
|
*
|
|
* Authors: AMD
|
|
*
|
|
*/
|
|
|
|
#ifndef __DC_LINK_DPMS_H__
|
|
#define __DC_LINK_DPMS_H__
|
|
|
|
#include "link.h"
|
|
bool link_set_dsc_pps_packet(struct pipe_ctx *pipe_ctx,
|
|
bool enable, bool immediate_update);
|
|
struct fixed31_32 link_calculate_sst_avg_time_slots_per_mtp(
|
|
const struct dc_stream_state *stream,
|
|
const struct dc_link *link);
|
|
void link_set_all_streams_dpms_off_for_link(struct dc_link *link);
|
|
void link_get_master_pipes_with_dpms_on(const struct dc_link *link,
|
|
struct dc_state *state,
|
|
uint8_t *count,
|
|
struct pipe_ctx *pipes[MAX_PIPES]);
|
|
#endif /* __DC_LINK_DPMS_H__ */
|