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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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056f2821b6
Add support for the Extron DA HD 4K Plus series of 4K HDMI Distrubution Amplifiers (aka HDMI Splitters). These devices support CEC and this driver adds support for the CEC protocol for both the input and all outputs (2, 4 or 6 outputs, depending on the model). It also exports the EDID from the outputs and allows reading and setting the EDID of the input. Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
52 lines
1.4 KiB
C
52 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright 2021-2024 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
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*/
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#ifndef _CEC_SPLITTER_H_
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#define _CEC_SPLITTER_H_
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struct cec_splitter;
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#define STATE_CHANGE_MAX_REPEATS 2
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struct cec_splitter_port {
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struct cec_splitter *splitter;
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struct cec_adapter *adap;
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unsigned int port;
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bool is_active_source;
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bool found_sink;
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ktime_t lost_sink_ts;
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u32 out_request_current_latency_seq;
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ktime_t out_request_current_latency_ts;
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u8 video_latency;
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u32 out_give_device_power_status_seq;
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ktime_t out_give_device_power_status_ts;
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u8 power_status;
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};
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struct cec_splitter {
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struct device *dev;
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unsigned int num_out_ports;
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struct cec_splitter_port **ports;
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/* High-level splitter state */
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u8 request_current_latency_dest;
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u8 give_device_power_status_dest;
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bool is_standby;
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};
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void cec_splitter_unconfigured_output(struct cec_splitter_port *port);
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void cec_splitter_configured_output(struct cec_splitter_port *port);
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int cec_splitter_received_input(struct cec_splitter_port *port, struct cec_msg *msg);
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int cec_splitter_received_output(struct cec_splitter_port *port, struct cec_msg *msg,
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struct cec_adapter *input_adap);
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void cec_splitter_nb_transmit_canceled_output(struct cec_splitter_port *port,
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const struct cec_msg *msg,
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struct cec_adapter *input_adap);
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bool cec_splitter_poll(struct cec_splitter *splitter,
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struct cec_adapter *input_adap, bool debug);
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#endif
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