diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_wb.c')
-rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_wb.c | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_wb.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_wb.c new file mode 100644 index 0000000000..08c494a7a2 --- /dev/null +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_wb.c @@ -0,0 +1,214 @@ +// 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 "dc.h" + +#include <drm/drm_edid.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) +{ + /* Maximum resolution supported by DWB */ + return drm_add_modes_noedid(connector, 3840, 2160); +} + +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 amdgpu_dm_wb_connector *wbcon, + uint32_t link_index) +{ + struct dc *dc = dm->dc; + struct dc_link *link = dc_get_link_at_index(dc, link_index); + int res = 0; + + wbcon->link = link; + + drm_connector_helper_add(&wbcon->base.base, &amdgpu_dm_wb_conn_helper_funcs); + + res = drm_writeback_connector_init(&dm->adev->ddev, &wbcon->base, + &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.base.funcs->reset) + wbcon->base.base.funcs->reset(&wbcon->base.base); + + return 0; +} |