[PATCH 03/18] drm/amd/display: Initialize writeback connector
Alex Hung
alex.hung at amd.com
Wed Aug 16 21:26:11 UTC 2023
[WHAT]
Create a drm_writeback_connector when connector signal equals
SIGNAL_TYPE_VIRTUAL.
Signed-off-by: Alex Hung <alex.hung at amd.com>
---
.../gpu/drm/amd/display/amdgpu_dm/Makefile | 3 +-
.../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 20 +-
.../drm/amd/display/amdgpu_dm/amdgpu_dm_wb.c | 209 ++++++++++++++++++
.../drm/amd/display/amdgpu_dm/amdgpu_dm_wb.h | 35 +++
4 files changed, 265 insertions(+), 2 deletions(-)
create mode 100644 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_wb.c
create mode 100644 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_wb.h
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/Makefile b/drivers/gpu/drm/amd/display/amdgpu_dm/Makefile
index 063205ecb137..ab2a97e354da 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/Makefile
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/Makefile
@@ -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
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 00254fdfa1f7..445369afcead 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -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"
@@ -4391,8 +4392,25 @@ 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)
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 000000000000..74e656696d8e
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_wb.c
@@ -0,0 +1,209 @@
+// 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;
+}
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_wb.h b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_wb.h
new file mode 100644
index 000000000000..0bc9df7e7ee1
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_wb.h
@@ -0,0 +1,35 @@
+/* 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
--
2.41.0
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