Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 175 insertions, 0 deletions

diff --git a/drivers/gpu/drm/vkms/vkms_writeback.c b/drivers/gpu/drm/vkms/vkms_writeback.c
new file mode 100644
index 000000000..84a51cd28
--- /dev/null
+++ b/drivers/gpu/drm/vkms/vkms_writeback.c
@@ -0,0 +1,175 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+#include <linux/iosys-map.h>
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_fourcc.h>
+#include <drm/drm_writeback.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_gem_shmem_helper.h>
+
+#include "vkms_drv.h"
+#include "vkms_formats.h"
+
+static const u32 vkms_wb_formats[] = {
+	DRM_FORMAT_XRGB8888,
+	DRM_FORMAT_XRGB16161616,
+	DRM_FORMAT_ARGB16161616,
+	DRM_FORMAT_RGB565
+};
+
+static const struct drm_connector_funcs vkms_wb_connector_funcs = {
+	.fill_modes = drm_helper_probe_single_connector_modes,
+	.destroy = drm_connector_cleanup,
+	.reset = drm_atomic_helper_connector_reset,
+	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+static int vkms_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;
+	int ret;
+
+	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;
+	}
+
+	ret = drm_atomic_helper_check_wb_encoder_state(encoder, conn_state);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static const struct drm_encoder_helper_funcs vkms_wb_encoder_helper_funcs = {
+	.atomic_check = vkms_wb_encoder_atomic_check,
+};
+
+static int vkms_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 vkms_wb_prepare_job(struct drm_writeback_connector *wb_connector,
+			       struct drm_writeback_job *job)
+{
+	struct vkms_writeback_job *vkmsjob;
+	int ret;
+
+	if (!job->fb)
+		return 0;
+
+	vkmsjob = kzalloc(sizeof(*vkmsjob), GFP_KERNEL);
+	if (!vkmsjob)
+		return -ENOMEM;
+
+	ret = drm_gem_fb_vmap(job->fb, vkmsjob->wb_frame_info.map, vkmsjob->data);
+	if (ret) {
+		DRM_ERROR("vmap failed: %d\n", ret);
+		goto err_kfree;
+	}
+
+	vkmsjob->wb_frame_info.fb = job->fb;
+	drm_framebuffer_get(vkmsjob->wb_frame_info.fb);
+
+	job->priv = vkmsjob;
+
+	return 0;
+
+err_kfree:
+	kfree(vkmsjob);
+	return ret;
+}
+
+static void vkms_wb_cleanup_job(struct drm_writeback_connector *connector,
+				struct drm_writeback_job *job)
+{
+	struct vkms_writeback_job *vkmsjob = job->priv;
+	struct vkms_device *vkmsdev;
+
+	if (!job->fb)
+		return;
+
+	drm_gem_fb_vunmap(job->fb, vkmsjob->wb_frame_info.map);
+
+	drm_framebuffer_put(vkmsjob->wb_frame_info.fb);
+
+	vkmsdev = drm_device_to_vkms_device(job->fb->dev);
+	vkms_set_composer(&vkmsdev->output, false);
+	kfree(vkmsjob);
+}
+
+static void vkms_wb_atomic_commit(struct drm_connector *conn,
+				  struct drm_atomic_state *state)
+{
+	struct drm_connector_state *connector_state = drm_atomic_get_new_connector_state(state,
+											 conn);
+	struct vkms_device *vkmsdev = drm_device_to_vkms_device(conn->dev);
+	struct vkms_output *output = &vkmsdev->output;
+	struct drm_writeback_connector *wb_conn = &output->wb_connector;
+	struct drm_connector_state *conn_state = wb_conn->base.state;
+	struct vkms_crtc_state *crtc_state = output->composer_state;
+	struct drm_framebuffer *fb = connector_state->writeback_job->fb;
+	u16 crtc_height = crtc_state->base.crtc->mode.vdisplay;
+	u16 crtc_width = crtc_state->base.crtc->mode.hdisplay;
+	struct vkms_writeback_job *active_wb;
+	struct vkms_frame_info *wb_frame_info;
+	u32 wb_format = fb->format->format;
+
+	if (!conn_state)
+		return;
+
+	vkms_set_composer(&vkmsdev->output, true);
+
+	active_wb = conn_state->writeback_job->priv;
+	wb_frame_info = &active_wb->wb_frame_info;
+
+	spin_lock_irq(&output->composer_lock);
+	crtc_state->active_writeback = active_wb;
+	wb_frame_info->offset = fb->offsets[0];
+	wb_frame_info->pitch = fb->pitches[0];
+	wb_frame_info->cpp = fb->format->cpp[0];
+	crtc_state->wb_pending = true;
+	spin_unlock_irq(&output->composer_lock);
+	drm_writeback_queue_job(wb_conn, connector_state);
+	active_wb->wb_write = get_line_to_frame_function(wb_format);
+	drm_rect_init(&wb_frame_info->src, 0, 0, crtc_width, crtc_height);
+	drm_rect_init(&wb_frame_info->dst, 0, 0, crtc_width, crtc_height);
+}
+
+static const struct drm_connector_helper_funcs vkms_wb_conn_helper_funcs = {
+	.get_modes = vkms_wb_connector_get_modes,
+	.prepare_writeback_job = vkms_wb_prepare_job,
+	.cleanup_writeback_job = vkms_wb_cleanup_job,
+	.atomic_commit = vkms_wb_atomic_commit,
+};
+
+int vkms_enable_writeback_connector(struct vkms_device *vkmsdev)
+{
+	struct drm_writeback_connector *wb = &vkmsdev->output.wb_connector;
+
+	drm_connector_helper_add(&wb->base, &vkms_wb_conn_helper_funcs);
+
+	return drm_writeback_connector_init(&vkmsdev->drm, wb,
+					    &vkms_wb_connector_funcs,
+					    &vkms_wb_encoder_helper_funcs,
+					    vkms_wb_formats,
+					    ARRAY_SIZE(vkms_wb_formats),
+					    1);
+}