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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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d6aed57481
Commit917de18037("drm: rcar-du: Implement universal plane support") made the number of planes per group dynamic, but didn't update all loops over the planes array, resulting in out-of-bound accesses on DU instances that have an odd number of CRTCs (such as the R8A7790). Fix it. Fixes:917de18037("drm: rcar-du: Implement universal plane support") Cc: stable@vger.kernel.org Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
62 lines
1.9 KiB
C
62 lines
1.9 KiB
C
/*
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* rcar_du_group.c -- R-Car Display Unit Planes and CRTCs Group
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*
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* Copyright (C) 2013-2014 Renesas Electronics Corporation
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*
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* Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#ifndef __RCAR_DU_GROUP_H__
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#define __RCAR_DU_GROUP_H__
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#include <linux/mutex.h>
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#include "rcar_du_plane.h"
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struct rcar_du_device;
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/*
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* struct rcar_du_group - CRTCs and planes group
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* @dev: the DU device
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* @mmio_offset: registers offset in the device memory map
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* @index: group index
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* @num_crtcs: number of CRTCs in this group (1 or 2)
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* @use_count: number of users of the group (rcar_du_group_(get|put))
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* @used_crtcs: number of CRTCs currently in use
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* @lock: protects the dptsr_planes field and the DPTSR register
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* @dptsr_planes: bitmask of planes driven by dot-clock and timing generator 1
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* @num_planes: number of planes in the group
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* @planes: planes handled by the group
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*/
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struct rcar_du_group {
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struct rcar_du_device *dev;
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unsigned int mmio_offset;
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unsigned int index;
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unsigned int num_crtcs;
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unsigned int use_count;
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unsigned int used_crtcs;
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struct mutex lock;
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unsigned int dptsr_planes;
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unsigned int num_planes;
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struct rcar_du_plane planes[RCAR_DU_NUM_KMS_PLANES];
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};
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u32 rcar_du_group_read(struct rcar_du_group *rgrp, u32 reg);
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void rcar_du_group_write(struct rcar_du_group *rgrp, u32 reg, u32 data);
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int rcar_du_group_get(struct rcar_du_group *rgrp);
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void rcar_du_group_put(struct rcar_du_group *rgrp);
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void rcar_du_group_start_stop(struct rcar_du_group *rgrp, bool start);
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void rcar_du_group_restart(struct rcar_du_group *rgrp);
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int rcar_du_group_set_routing(struct rcar_du_group *rgrp);
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#endif /* __RCAR_DU_GROUP_H__ */
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