drm/amd/display: Initialize writeback connector (a2830b9e) · Commits · git / linux-net

drivers/gpu/drm/amd/display/amdgpu_dm/Makefile

+2 −1

Original line number	Diff line number	Diff line
		@@ -37,7 +37,8 @@ AMDGPUDM = \
		amdgpu_dm_helpers.o \
		amdgpu_dm_pp_smu.o \
		amdgpu_dm_psr.o \
		amdgpu_dm_replay.o
		amdgpu_dm_replay.o \
		amdgpu_dm_wb.o

		ifdef CONFIG_DRM_AMD_DC_FP
		AMDGPUDM += dc_fpu.o

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

+19 −1

Original line number	Diff line number	Diff line
		@@ -54,6 +54,7 @@
		#include "amdgpu_dm_crtc.h"
		#include "amdgpu_dm_hdcp.h"
		#include <drm/display/drm_hdcp_helper.h>
		#include "amdgpu_dm_wb.h"
		#include "amdgpu_pm.h"
		#include "amdgpu_atombios.h"

		@@ -4511,8 +4512,25 @@ static int amdgpu_dm_initialize_drm_device(struct amdgpu_device *adev)

		link = dc_get_link_at_index(dm->dc, i);

		if (link->connector_signal == SIGNAL_TYPE_VIRTUAL)
		if (link->connector_signal == SIGNAL_TYPE_VIRTUAL) {
		struct drm_writeback_connector wbcon = kzalloc(sizeof(wbcon), GFP_KERNEL);

		if (!wbcon) {
		DRM_ERROR("KMS: Failed to allocate writeback connector\n");
		continue;
		}

		if (amdgpu_dm_wb_connector_init(dm, wbcon)) {
		DRM_ERROR("KMS: Failed to initialize writeback connector\n");
		kfree(wbcon);
		continue;
		}

		link->psr_settings.psr_feature_enabled = false;
		link->psr_settings.psr_version = DC_PSR_VERSION_UNSUPPORTED;

		continue;
		}

		aconnector = kzalloc(sizeof(*aconnector), GFP_KERNEL);
		if (!aconnector)

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_wb.c

0 → 100644

+209 −0

Original line number	Diff line number	Diff line
		// SPDX-License-Identifier: MIT
		/*
		* Copyright 2022 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 "dm_services_types.h"

		#include "amdgpu.h"
		#include "amdgpu_dm.h"
		#include "amdgpu_dm_wb.h"
		#include "amdgpu_display.h"

		#include <drm/drm_atomic_state_helper.h>
		#include <drm/drm_modeset_helper_vtables.h>

		static const u32 amdgpu_dm_wb_formats[] = {
		DRM_FORMAT_XRGB2101010,
		};

		static int amdgpu_dm_wb_encoder_atomic_check(struct drm_encoder *encoder,
		struct drm_crtc_state *crtc_state,
		struct drm_connector_state *conn_state)
		{
		struct drm_framebuffer *fb;
		const struct drm_display_mode *mode = &crtc_state->mode;
		bool found = false;
		uint8_t i;

		if (!conn_state->writeback_job \|\| !conn_state->writeback_job->fb)
		return 0;

		fb = conn_state->writeback_job->fb;
		if (fb->width != mode->hdisplay \|\| fb->height != mode->vdisplay) {
		DRM_DEBUG_KMS("Invalid framebuffer size %ux%u\n",
		fb->width, fb->height);
		return -EINVAL;
		}

		for (i = 0; i < sizeof(amdgpu_dm_wb_formats) / sizeof(u32); i++) {
		if (fb->format->format == amdgpu_dm_wb_formats[i])
		found = true;
		}

		if (!found) {
		DRM_DEBUG_KMS("Invalid pixel format %p4cc\n",
		&fb->format->format);
		return -EINVAL;
		}

		return 0;
		}


		static int amdgpu_dm_wb_connector_get_modes(struct drm_connector *connector)
		{
		struct drm_device *dev = connector->dev;

		return drm_add_modes_noedid(connector, dev->mode_config.max_width,
		dev->mode_config.max_height);
		}

		static int amdgpu_dm_wb_prepare_job(struct drm_writeback_connector *wb_connector,
		struct drm_writeback_job *job)
		{
		struct amdgpu_framebuffer *afb;
		struct drm_gem_object *obj;
		struct amdgpu_device *adev;
		struct amdgpu_bo *rbo;
		uint32_t domain;
		int r;

		if (!job->fb) {
		DRM_DEBUG_KMS("No FB bound\n");
		return 0;
		}

		afb = to_amdgpu_framebuffer(job->fb);
		obj = job->fb->obj[0];
		rbo = gem_to_amdgpu_bo(obj);
		adev = amdgpu_ttm_adev(rbo->tbo.bdev);

		r = amdgpu_bo_reserve(rbo, true);
		if (r) {
		dev_err(adev->dev, "fail to reserve bo (%d)\n", r);
		return r;
		}

		r = dma_resv_reserve_fences(rbo->tbo.base.resv, 1);
		if (r) {
		dev_err(adev->dev, "reserving fence slot failed (%d)\n", r);
		goto error_unlock;
		}

		domain = amdgpu_display_supported_domains(adev, rbo->flags);

		r = amdgpu_bo_pin(rbo, domain);
		if (unlikely(r != 0)) {
		if (r != -ERESTARTSYS)
		DRM_ERROR("Failed to pin framebuffer with error %d\n", r);
		goto error_unlock;
		}

		r = amdgpu_ttm_alloc_gart(&rbo->tbo);
		if (unlikely(r != 0)) {
		DRM_ERROR("%p bind failed\n", rbo);
		goto error_unpin;
		}

		amdgpu_bo_unreserve(rbo);

		afb->address = amdgpu_bo_gpu_offset(rbo);

		amdgpu_bo_ref(rbo);

		return 0;

		error_unpin:
		amdgpu_bo_unpin(rbo);

		error_unlock:
		amdgpu_bo_unreserve(rbo);
		return r;
		}

		static void amdgpu_dm_wb_cleanup_job(struct drm_writeback_connector *connector,
		struct drm_writeback_job *job)
		{
		struct amdgpu_bo *rbo;
		int r;

		if (!job->fb)
		return;

		rbo = gem_to_amdgpu_bo(job->fb->obj[0]);
		r = amdgpu_bo_reserve(rbo, false);
		if (unlikely(r)) {
		DRM_ERROR("failed to reserve rbo before unpin\n");
		return;
		}

		amdgpu_bo_unpin(rbo);
		amdgpu_bo_unreserve(rbo);
		amdgpu_bo_unref(&rbo);
		}

		static const struct drm_encoder_helper_funcs amdgpu_dm_wb_encoder_helper_funcs = {
		.atomic_check = amdgpu_dm_wb_encoder_atomic_check,
		};

		static const struct drm_connector_funcs amdgpu_dm_wb_connector_funcs = {
		.fill_modes = drm_helper_probe_single_connector_modes,
		.destroy = drm_connector_cleanup,
		.reset = amdgpu_dm_connector_funcs_reset,
		.atomic_duplicate_state = amdgpu_dm_connector_atomic_duplicate_state,
		.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
		};

		static const struct drm_connector_helper_funcs amdgpu_dm_wb_conn_helper_funcs = {
		.get_modes = amdgpu_dm_wb_connector_get_modes,
		.prepare_writeback_job = amdgpu_dm_wb_prepare_job,
		.cleanup_writeback_job = amdgpu_dm_wb_cleanup_job,
		};

		int amdgpu_dm_wb_connector_init(struct amdgpu_display_manager *dm,
		struct drm_writeback_connector *wbcon)
		{
		int res = 0;

		drm_connector_helper_add(&wbcon->base, &amdgpu_dm_wb_conn_helper_funcs);

		res = drm_writeback_connector_init(&dm->adev->ddev, wbcon,
		&amdgpu_dm_wb_connector_funcs,
		&amdgpu_dm_wb_encoder_helper_funcs,
		amdgpu_dm_wb_formats,
		ARRAY_SIZE(amdgpu_dm_wb_formats),
		amdgpu_dm_get_encoder_crtc_mask(dm->adev));

		if (res)
		return res;
		/*
		* Some of the properties below require access to state, like bpc.
		* Allocate some default initial connector state with our reset helper.
		*/
		if (wbcon->base.funcs->reset)
		wbcon->base.funcs->reset(&wbcon->base);

		return 0;
		}

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_wb.h

0 → 100644

+35 −0

Original line number	Diff line number	Diff line
		/* SPDX-License-Identifier: MIT */
		/*
		* Copyright 2022 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
		*
		*/

		#ifndef __AMDGPU_DM_WB_H__
		#define __AMDGPU_DM_WB_H__

		#include <drm/drm_writeback.h>

		int amdgpu_dm_wb_connector_init(struct amdgpu_display_manager *dm,
		struct drm_writeback_connector *wbcon);

		#endif