/* * Copyright 2015 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 * */ #include <linux/string.h>#include <linux/acpi.h>#include <linux/version.h>#include <linux/i2c.h> #include <drm/drmP.h>#include <drm/drm_probe_helper.h>#include <drm/amdgpu_drm.h>#include <drm/drm_edid.h> #include "dm_services.h"#include "amdgpu.h"#include "dc.h"#include "amdgpu_dm.h"#include "amdgpu_dm_irq.h" #include "dm_helpers.h" /* dm_helpers_parse_edid_caps * * Parse edid caps * * @edid:	[in] pointer to edid *  edid_caps:	[in] pointer to edid caps * @return *	void * */enum dc_edid_status dm_helpers_parse_edid_caps(		struct dc_context *ctx,		const struct dc_edid *edid,		struct dc_edid_caps *edid_caps){	struct edid *edid_buf = (struct edid *) edid->raw_edid;	struct cea_sad *sads;	int sad_count = -1;	int sadb_count = -1;	int i = 0;	int j = 0;	uint8_t *sadb = NULL; 	enum dc_edid_status result = EDID_OK; 	if (!edid_caps || !edid)		return EDID_BAD_INPUT; 	if (!drm_edid_is_valid(edid_buf))		result = EDID_BAD_CHECKSUM; 	edid_caps->manufacturer_id = (uint16_t) edid_buf->mfg_id[0] |					((uint16_t) edid_buf->mfg_id[1])<<8;	edid_caps->product_id = (uint16_t) edid_buf->prod_code[0] |					((uint16_t) edid_buf->prod_code[1])<<8;	edid_caps->serial_number = edid_buf->serial;	edid_caps->manufacture_week = edid_buf->mfg_week;	edid_caps->manufacture_year = edid_buf->mfg_year; 	/* One of the four detailed_timings stores the monitor name. It's	 * stored in an array of length 13. */	for (i = 0; i < 4; i++) {		if (edid_buf->detailed_timings[i].data.other_data.type == 0xfc) {			while (j < 13 && edid_buf->detailed_timings[i].data.other_data.data.str.str[j]) {				if (edid_buf->detailed_timings[i].data.other_data.data.str.str[j] == '\n')					break; 				edid_caps->display_name[j] =					edid_buf->detailed_timings[i].data.other_data.data.str.str[j];				j++;			}		}	} 	edid_caps->edid_hdmi = drm_detect_hdmi_monitor(			(struct edid *) edid->raw_edid); 	sad_count = drm_edid_to_sad((struct edid *) edid->raw_edid, &sads);	if (sad_count <= 0) {		DRM_INFO("SADs count is: %d, don't need to read it\n",				sad_count);		return result;	} 	edid_caps->audio_mode_count = sad_count < DC_MAX_AUDIO_DESC_COUNT ? sad_count : DC_MAX_AUDIO_DESC_COUNT;	for (i = 0; i < edid_caps->audio_mode_count; ++i) {		struct cea_sad *sad = &sads[i]; 		edid_caps->audio_modes[i].format_code = sad->format;		edid_caps->audio_modes[i].channel_count = sad->channels + 1;		edid_caps->audio_modes[i].sample_rate = sad->freq;		edid_caps->audio_modes[i].sample_size = sad->byte2;	} 	sadb_count = drm_edid_to_speaker_allocation((struct edid *) edid->raw_edid, &sadb); 	if (sadb_count < 0) {		DRM_ERROR("Couldn't read Speaker Allocation Data Block: %d\n", sadb_count);		sadb_count = 0;	} 	if (sadb_count)		edid_caps->speaker_flags = sadb[0];	else		edid_caps->speaker_flags = DEFAULT_SPEAKER_LOCATION; 	kfree(sads);	kfree(sadb); 	return result;} static void get_payload_table(		struct amdgpu_dm_connector *aconnector,		struct dp_mst_stream_allocation_table *proposed_table){	int i;	struct drm_dp_mst_topology_mgr *mst_mgr =			&aconnector->mst_port->mst_mgr; 	mutex_lock(&mst_mgr->payload_lock); 	proposed_table->stream_count = 0; 	/* number of active streams */	for (i = 0; i < mst_mgr->max_payloads; i++) {		if (mst_mgr->payloads[i].num_slots == 0)			break; /* end of vcp_id table */ 		ASSERT(mst_mgr->payloads[i].payload_state !=				DP_PAYLOAD_DELETE_LOCAL); 		if (mst_mgr->payloads[i].payload_state == DP_PAYLOAD_LOCAL ||			mst_mgr->payloads[i].payload_state ==					DP_PAYLOAD_REMOTE) { 			struct dp_mst_stream_allocation *sa =					&proposed_table->stream_allocations[						proposed_table->stream_count]; 			sa->slot_count = mst_mgr->payloads[i].num_slots;			sa->vcp_id = mst_mgr->proposed_vcpis[i]->vcpi;			proposed_table->stream_count++;		}	} 	mutex_unlock(&mst_mgr->payload_lock);} void dm_helpers_dp_update_branch_info(	struct dc_context *ctx,	const struct dc_link *link){} /* * Writes payload allocation table in immediate downstream device. */bool dm_helpers_dp_mst_write_payload_allocation_table(		struct dc_context *ctx,		const struct dc_stream_state *stream,		struct dp_mst_stream_allocation_table *proposed_table,		bool enable){	struct amdgpu_dm_connector *aconnector;	struct drm_dp_mst_topology_mgr *mst_mgr;	struct drm_dp_mst_port *mst_port;	int slots = 0;	bool ret;	int clock;	int bpp = 0;	int pbn = 0; 	aconnector = (struct amdgpu_dm_connector *)stream->dm_stream_context; 	if (!aconnector || !aconnector->mst_port)		return false; 	mst_mgr = &aconnector->mst_port->mst_mgr; 	if (!mst_mgr->mst_state)		return false; 	mst_port = aconnector->port; 	if (enable) {		clock = stream->timing.pix_clk_100hz / 10; 		switch (stream->timing.display_color_depth) { 		case COLOR_DEPTH_666:			bpp = 6;			break;		case COLOR_DEPTH_888:			bpp = 8;			break;		case COLOR_DEPTH_101010:			bpp = 10;			break;		case COLOR_DEPTH_121212:			bpp = 12;			break;		case COLOR_DEPTH_141414:			bpp = 14;			break;		case COLOR_DEPTH_161616:			bpp = 16;			break;		default:			ASSERT(bpp != 0);			break;		} 		bpp = bpp * 3; 		/* TODO need to know link rate */ 		pbn = drm_dp_calc_pbn_mode(clock, bpp); 		slots = drm_dp_find_vcpi_slots(mst_mgr, pbn);		ret = drm_dp_mst_allocate_vcpi(mst_mgr, mst_port, pbn, slots); 		if (!ret)			return false; 	} else {		drm_dp_mst_reset_vcpi_slots(mst_mgr, mst_port);	} 	ret = drm_dp_update_payload_part1(mst_mgr); 	/* mst_mgr->->payloads are VC payload notify MST branch using DPCD or	 * AUX message. The sequence is slot 1-63 allocated sequence for each	 * stream. AMD ASIC stream slot allocation should follow the same	 * sequence. copy DRM MST allocation to dc */ 	get_payload_table(aconnector, proposed_table); 	if (ret)		return false; 	return true;} /* * poll pending down reply */void dm_helpers_dp_mst_poll_pending_down_reply(	struct dc_context *ctx,	const struct dc_link *link){} /* * Clear payload allocation table before enable MST DP link. */void dm_helpers_dp_mst_clear_payload_allocation_table(	struct dc_context *ctx,	const struct dc_link *link){} /* * Polls for ACT (allocation change trigger) handled and sends * ALLOCATE_PAYLOAD message. */bool dm_helpers_dp_mst_poll_for_allocation_change_trigger(		struct dc_context *ctx,		const struct dc_stream_state *stream){	struct amdgpu_dm_connector *aconnector;	struct drm_dp_mst_topology_mgr *mst_mgr;	int ret; 	aconnector = (struct amdgpu_dm_connector *)stream->dm_stream_context; 	if (!aconnector || !aconnector->mst_port)		return false; 	mst_mgr = &aconnector->mst_port->mst_mgr; 	if (!mst_mgr->mst_state)		return false; 	ret = drm_dp_check_act_status(mst_mgr); 	if (ret)		return false; 	return true;} bool dm_helpers_dp_mst_send_payload_allocation(		struct dc_context *ctx,		const struct dc_stream_state *stream,		bool enable){	struct amdgpu_dm_connector *aconnector;	struct drm_dp_mst_topology_mgr *mst_mgr;	struct drm_dp_mst_port *mst_port;	int ret; 	aconnector = (struct amdgpu_dm_connector *)stream->dm_stream_context; 	if (!aconnector || !aconnector->mst_port)		return false; 	mst_port = aconnector->port; 	mst_mgr = &aconnector->mst_port->mst_mgr; 	if (!mst_mgr->mst_state)		return false; 	ret = drm_dp_update_payload_part2(mst_mgr); 	if (ret)		return false; 	if (!enable)		drm_dp_mst_deallocate_vcpi(mst_mgr, mst_port); 	return true;} void dm_dtn_log_begin(struct dc_context *ctx,	struct dc_log_buffer_ctx *log_ctx){	static const char msg[] = "[dtn begin]\n"; 	if (!log_ctx) {		pr_info("%s", msg);		return;	} 	dm_dtn_log_append_v(ctx, log_ctx, "%s", msg);} void dm_dtn_log_append_v(struct dc_context *ctx,	struct dc_log_buffer_ctx *log_ctx,	const char *msg, ...){	va_list args;	size_t total;	int n; 	if (!log_ctx) {		/* No context, redirect to dmesg. */		struct va_format vaf; 		vaf.fmt = msg;		vaf.va = &args; 		va_start(args, msg);		pr_info("%pV", &vaf);		va_end(args); 		return;	} 	/* Measure the output. */	va_start(args, msg);	n = vsnprintf(NULL, 0, msg, args);	va_end(args); 	if (n <= 0)		return; 	/* Reallocate the string buffer as needed. */	total = log_ctx->pos + n + 1; 	if (total > log_ctx->size) {		char *buf = (char *)kvcalloc(total, sizeof(char), GFP_KERNEL); 		if (buf) {			memcpy(buf, log_ctx->buf, log_ctx->pos);			kfree(log_ctx->buf); 			log_ctx->buf = buf;			log_ctx->size = total;		}	} 	if (!log_ctx->buf)		return; 	/* Write the formatted string to the log buffer. */	va_start(args, msg);	n = vscnprintf(		log_ctx->buf + log_ctx->pos,		log_ctx->size - log_ctx->pos,		msg,		args);	va_end(args); 	if (n > 0)		log_ctx->pos += n;} void dm_dtn_log_end(struct dc_context *ctx,	struct dc_log_buffer_ctx *log_ctx){	static const char msg[] = "[dtn end]\n"; 	if (!log_ctx) {		pr_info("%s", msg);		return;	} 	dm_dtn_log_append_v(ctx, log_ctx, "%s", msg);} bool dm_helpers_dp_mst_start_top_mgr(		struct dc_context *ctx,		const struct dc_link *link,		bool boot){	struct amdgpu_dm_connector *aconnector = link->priv; 	if (!aconnector) {			DRM_ERROR("Failed to found connector for link!");			return false;	} 	if (boot) {		DRM_INFO("DM_MST: Differing MST start on aconnector: %p [id: %d]\n",					aconnector, aconnector->base.base.id);		return true;	} 	DRM_INFO("DM_MST: starting TM on aconnector: %p [id: %d]\n",			aconnector, aconnector->base.base.id); 	return (drm_dp_mst_topology_mgr_set_mst(&aconnector->mst_mgr, true) == 0);} void dm_helpers_dp_mst_stop_top_mgr(		struct dc_context *ctx,		const struct dc_link *link){	struct amdgpu_dm_connector *aconnector = link->priv; 	if (!aconnector) {			DRM_ERROR("Failed to found connector for link!");			return;	} 	DRM_INFO("DM_MST: stopping TM on aconnector: %p [id: %d]\n",			aconnector, aconnector->base.base.id); 	if (aconnector->mst_mgr.mst_state == true)		drm_dp_mst_topology_mgr_set_mst(&aconnector->mst_mgr, false);} bool dm_helpers_dp_read_dpcd(		struct dc_context *ctx,		const struct dc_link *link,		uint32_t address,		uint8_t *data,		uint32_t size){ 	struct amdgpu_dm_connector *aconnector = link->priv; 	if (!aconnector) {		DRM_ERROR("Failed to found connector for link!");		return false;	} 	return drm_dp_dpcd_read(&aconnector->dm_dp_aux.aux, address,			data, size) > 0;} bool dm_helpers_dp_write_dpcd(		struct dc_context *ctx,		const struct dc_link *link,		uint32_t address,		const uint8_t *data,		uint32_t size){	struct amdgpu_dm_connector *aconnector = link->priv;

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