95 lines
2.5 KiB
C
95 lines
2.5 KiB
C
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/*
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* dp_auto.c: dp auto functions definitions.
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*
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* Copyright (c) 2016-2017, NVIDIA CORPORATION, All rights reserved.
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* Author: Animesh Kishore <ankishore@nvidia.com>
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include "dp.h"
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#include "dc_priv_defs.h"
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#include "dp_auto.h"
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bool tegra_dp_auto_is_rq(struct tegra_dc_dp_data *dp)
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{
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u8 data = 0;
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tegra_dc_dp_dpcd_read(dp, NV_DPCD_DEVICE_SERVICE_IRQ_VECTOR, &data);
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return !!(data & NV_DPCD_DEVICE_SERVICE_IRQ_VECTOR_AUTO_TEST_YES);
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}
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bool tegra_dp_auto_is_test_supported(enum auto_test_requests test_rq)
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{
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return test_rq == TEST_LINK_TRAINING ||
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test_rq == TEST_PATTERN ||
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test_rq == TEST_EDID_READ;
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}
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enum auto_test_requests tegra_dp_auto_get_test_rq(struct tegra_dc_dp_data *dp)
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{
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u8 test_rq_bitmap;
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if (tegra_dc_dp_dpcd_read(dp, NV_DPCD_TEST_REQUEST, &test_rq_bitmap)) {
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dev_warn(&dp->dc->ndev->dev, "dp: error retriving test requested\n");
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return -EIO;
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}
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if (test_rq_bitmap & NV_DPCD_TEST_REQUEST_TEST_LT)
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return TEST_LINK_TRAINING;
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else if (test_rq_bitmap & NV_DPCD_TEST_REQUEST_TEST_PATTERN)
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return TEST_PATTERN;
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else if (test_rq_bitmap & NV_DPCD_TEST_REQUEST_TEST_EDID_READ)
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return TEST_EDID_READ;
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dev_info(&dp->dc->ndev->dev, "dp: unsupported test requested\n");
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return -EINVAL;
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}
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static void clear_test_rq(struct tegra_dc_dp_data *dp)
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{
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tegra_dc_dp_dpcd_write(dp, NV_DPCD_DEVICE_SERVICE_IRQ_VECTOR,
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NV_DPCD_DEVICE_SERVICE_IRQ_VECTOR_AUTO_TEST_YES);
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}
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void tegra_dp_auto_ack_test_rq(struct tegra_dc_dp_data *dp)
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{
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clear_test_rq(dp);
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tegra_dc_dp_dpcd_write(dp, NV_DPCD_TEST_RESPONSE,
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NV_DPCD_TEST_RESPONSE_ACK);
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}
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void tegra_dp_auto_nack_test_rq(struct tegra_dc_dp_data *dp)
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{
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clear_test_rq(dp);
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tegra_dc_dp_dpcd_write(dp, NV_DPCD_TEST_RESPONSE,
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NV_DPCD_TEST_RESPONSE_NACK);
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}
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void tegra_dp_auto_set_edid_checksum(struct tegra_dc_dp_data *dp)
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{
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struct tegra_dc *dc = dp->dc;
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struct tegra_dc_edid *edid = tegra_dc_get_edid(dc);
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if (edid) {
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if (edid->len) {
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tegra_dc_dp_dpcd_write(dp, NV_DPCD_TEST_EDID_CHECKSUM,
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edid->buf[edid->len - 1]);
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tegra_dc_dp_dpcd_write(dp, NV_DPCD_TEST_RESPONSE,
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NV_DPCD_TEST_EDID_CHECKSUM_WR);
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}
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tegra_dc_put_edid(edid);
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}
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}
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