32dd923669
And use it to bail early in DP detection and avoid futile AUX transactions. This could be used on other connector types too in theory, but it's not something we've ever done before and I'd rather not risk breaking working systems without looking into it more closely. It's safe for DP though. We already do this by checking an AUX register that contains HPD status and aborting the transaction. However, this is much deeper in the stack - after taking various mutexes, poking HW for no good reason, and making a mess in debug logs. Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
62 lines
2 KiB
C
62 lines
2 KiB
C
/*
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* Copyright 2021 Red Hat Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <nvif/conn.h>
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#include <nvif/disp.h>
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#include <nvif/printf.h>
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#include <nvif/class.h>
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#include <nvif/if0011.h>
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int
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nvif_conn_hpd_status(struct nvif_conn *conn)
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{
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struct nvif_conn_hpd_status_v0 args;
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int ret;
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args.version = 0;
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ret = nvif_mthd(&conn->object, NVIF_CONN_V0_HPD_STATUS, &args, sizeof(args));
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NVIF_ERRON(ret, &conn->object, "[HPD_STATUS] support:%d present:%d",
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args.support, args.present);
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return ret ? ret : !!args.support + !!args.present;
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}
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void
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nvif_conn_dtor(struct nvif_conn *conn)
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{
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nvif_object_dtor(&conn->object);
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}
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int
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nvif_conn_ctor(struct nvif_disp *disp, const char *name, int id, struct nvif_conn *conn)
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{
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struct nvif_conn_v0 args;
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int ret;
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args.version = 0;
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args.id = id;
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ret = nvif_object_ctor(&disp->object, name ?: "nvifConn", id, NVIF_CLASS_CONN,
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&args, sizeof(args), &conn->object);
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NVIF_ERRON(ret, &disp->object, "[NEW conn id:%d]", id);
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return ret;
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}
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