[PATCH 3/3] drm/vkms: Switch to dynamic allocation for CRTC
From: Louis Chauvet
Date: Thu Sep 12 2024 - 10:46:30 EST
specific allocation for the CRTC is not strictly necessary at this point,
but in order to implement dynamic configuration of VKMS (configFS), it
will be easier to have one allocation per CRTC.
Signed-off-by: Louis Chauvet <louis.chauvet@xxxxxxxxxxx>
---
drivers/gpu/drm/vkms/vkms_crtc.c | 28 ++++++++++++++-----------
drivers/gpu/drm/vkms/vkms_drv.h | 9 ++++----
drivers/gpu/drm/vkms/vkms_output.c | 39 ++++++++++++++++++-----------------
drivers/gpu/drm/vkms/vkms_writeback.c | 17 ++++++++-------
4 files changed, 50 insertions(+), 43 deletions(-)
diff --git a/drivers/gpu/drm/vkms/vkms_crtc.c b/drivers/gpu/drm/vkms/vkms_crtc.c
index 821b9ac746083630116e05c1cf8e3dc2424ac66a..1169eb5a5e521fb42b1af85082425cd71aa2be4d 100644
--- a/drivers/gpu/drm/vkms/vkms_crtc.c
+++ b/drivers/gpu/drm/vkms/vkms_crtc.c
@@ -88,7 +88,7 @@ static bool vkms_get_vblank_timestamp(struct drm_crtc *crtc,
{
struct drm_device *dev = crtc->dev;
struct vkms_device *vkmsdev = drm_device_to_vkms_device(dev);
- struct vkms_output *output = &vkmsdev->output;
+ struct vkms_output *output = drm_crtc_to_vkms_output(crtc);
struct drm_vblank_crtc *vblank = drm_crtc_vblank_crtc(crtc);
if (!READ_ONCE(vblank->enabled)) {
@@ -281,19 +281,23 @@ static void vkms_crtc_destroy_workqueue(struct drm_device *dev,
destroy_workqueue(vkms_out->composer_workq);
}
-int vkms_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
- struct drm_plane *primary, struct drm_plane *cursor)
+struct vkms_output *vkms_crtc_init(struct drm_device *dev, struct drm_plane *primary,
+ struct drm_plane *cursor)
{
- struct vkms_output *vkms_out = drm_crtc_to_vkms_output(crtc);
+ struct vkms_output *vkms_out;
+ struct drm_crtc *crtc;
int ret;
- ret = drmm_crtc_init_with_planes(dev, crtc, primary, cursor,
- &vkms_crtc_funcs, NULL);
- if (ret) {
- DRM_ERROR("Failed to init CRTC\n");
- return ret;
+ vkms_out = drmm_crtc_alloc_with_planes(dev, struct vkms_output, crtc,
+ primary, cursor,
+ &vkms_crtc_funcs, NULL);
+ if (IS_ERR(vkms_out)) {
+ DRM_DEV_ERROR(dev->dev, "Failed to init CRTC\n");
+ return vkms_out;
}
+ crtc = &vkms_out->crtc;
+
drm_crtc_helper_add(crtc, &vkms_crtc_helper_funcs);
drm_mode_crtc_set_gamma_size(crtc, VKMS_LUT_SIZE);
@@ -304,12 +308,12 @@ int vkms_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
vkms_out->composer_workq = alloc_ordered_workqueue("vkms_composer", 0);
if (!vkms_out->composer_workq)
- return -ENOMEM;
+ return ERR_PTR(-ENOMEM);
ret = drmm_add_action_or_reset(dev, vkms_crtc_destroy_workqueue,
vkms_out);
if (ret)
- return ret;
+ return ERR_PTR(ret);
- return ret;
+ return vkms_out;
}
diff --git a/drivers/gpu/drm/vkms/vkms_drv.h b/drivers/gpu/drm/vkms/vkms_drv.h
index 972aee6853f2b29909291e33652f68740fdc9dbc..a97164c0c2d62c4b6bb5641d09b3607a742cf585 100644
--- a/drivers/gpu/drm/vkms/vkms_drv.h
+++ b/drivers/gpu/drm/vkms/vkms_drv.h
@@ -126,7 +126,6 @@ struct vkms_config {
struct vkms_device {
struct drm_device drm;
struct platform_device *platform;
- struct vkms_output output;
const struct vkms_config *config;
};
@@ -143,8 +142,9 @@ struct vkms_device {
container_of(target, struct vkms_plane_state, base.base)
/* CRTC */
-int vkms_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
- struct drm_plane *primary, struct drm_plane *cursor);
+struct vkms_output *vkms_crtc_init(struct drm_device *dev,
+ struct drm_plane *primary,
+ struct drm_plane *cursor);
int vkms_output_init(struct vkms_device *vkmsdev);
@@ -165,6 +165,7 @@ void vkms_compose_row(struct line_buffer *stage_buffer, struct vkms_plane_state
void vkms_writeback_row(struct vkms_writeback_job *wb, const struct line_buffer *src_buffer, int y);
/* Writeback */
-int vkms_enable_writeback_connector(struct vkms_device *vkmsdev);
+int vkms_enable_writeback_connector(struct vkms_device *vkmsdev,
+ struct vkms_output *vkms_out);
#endif /* _VKMS_DRV_H_ */
diff --git a/drivers/gpu/drm/vkms/vkms_output.c b/drivers/gpu/drm/vkms/vkms_output.c
index 60d5365f8d41b8f20da489cfb9dbc85eb9df4916..a57a0cfa21964577f98e564acf87711b2e85fa67 100644
--- a/drivers/gpu/drm/vkms/vkms_output.c
+++ b/drivers/gpu/drm/vkms/vkms_output.c
@@ -29,11 +29,11 @@ static const struct drm_connector_helper_funcs vkms_conn_helper_funcs = {
int vkms_output_init(struct vkms_device *vkmsdev)
{
- struct vkms_output *output = &vkmsdev->output;
+
struct drm_device *dev = &vkmsdev->drm;
struct drm_connector *connector;
struct drm_encoder *encoder;
- struct drm_crtc *crtc = &output->crtc;
+ struct vkms_output *output;
struct vkms_plane *primary, *overlay, *cursor = NULL;
int ret;
int writeback;
@@ -49,31 +49,33 @@ int vkms_output_init(struct vkms_device *vkmsdev)
return PTR_ERR(cursor);
}
- ret = vkms_crtc_init(dev, crtc, &primary->base, &cursor->base);
- if (ret)
- return ret;
+ output = vkms_crtc_init(dev, &primary->base,
+ cursor ? &cursor->base : NULL);
+ if (IS_ERR(output)) {
+ DRM_ERROR("Failed to allocate CRTC\n");
+ return PTR_ERR(output);
+ }
if (vkmsdev->config->overlay) {
for (n = 0; n < NUM_OVERLAY_PLANES; n++) {
overlay = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_OVERLAY);
if (IS_ERR(overlay))
return PTR_ERR(overlay);
- overlay->base.possible_crtcs = drm_crtc_mask(crtc);
+ overlay->base.possible_crtcs = drm_crtc_mask(&output->crtc);
}
}
connector = drmm_kzalloc(dev, sizeof(*connector), GFP_KERNEL);
if (!connector) {
DRM_ERROR("Failed to allocate connector\n");
- ret = -ENOMEM;
- goto err_connector;
+ return -ENOMEM;
}
ret = drmm_connector_init(dev, connector, &vkms_connector_funcs,
DRM_MODE_CONNECTOR_VIRTUAL, NULL);
if (ret) {
DRM_ERROR("Failed to init connector\n");
- goto err_connector;
+ return ret;
}
drm_connector_helper_add(connector, &vkms_conn_helper_funcs);
@@ -81,34 +83,33 @@ int vkms_output_init(struct vkms_device *vkmsdev)
encoder = drmm_kzalloc(dev, sizeof(*encoder), GFP_KERNEL);
if (!encoder) {
DRM_ERROR("Failed to allocate encoder\n");
- ret = -ENOMEM;
- goto err_connector;
+ return -ENOMEM;
}
ret = drmm_encoder_init(dev, encoder, NULL,
DRM_MODE_ENCODER_VIRTUAL, NULL);
if (ret) {
DRM_ERROR("Failed to init encoder\n");
- goto err_connector;
+ return ret;
}
- encoder->possible_crtcs = drm_crtc_mask(crtc);
+ encoder->possible_crtcs = drm_crtc_mask(&output->crtc);
+ /* Attach the encoder and the connector */
ret = drm_connector_attach_encoder(connector, encoder);
if (ret) {
DRM_ERROR("Failed to attach connector to encoder\n");
return ret;
}
+ /* Initialize the writeback component */
if (vkmsdev->config->writeback) {
- writeback = vkms_enable_writeback_connector(vkmsdev);
- if (writeback)
+ writeback = vkms_enable_writeback_connector(vkmsdev, output);
+ if (writeback) {
DRM_ERROR("Failed to init writeback connector\n");
+ return ret;
+ }
}
drm_mode_config_reset(dev);
return 0;
-
-err_connector:
- drm_crtc_cleanup(crtc);
- return ret;
}
diff --git a/drivers/gpu/drm/vkms/vkms_writeback.c b/drivers/gpu/drm/vkms/vkms_writeback.c
index a948f4598764efef971f76e1016fc1a963fbbba7..f91c6418480f71ab3ec9989ea85814460e10d231 100644
--- a/drivers/gpu/drm/vkms/vkms_writeback.c
+++ b/drivers/gpu/drm/vkms/vkms_writeback.c
@@ -105,7 +105,9 @@ 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;
+ struct vkms_output *vkms_output = container_of(connector,
+ struct vkms_output,
+ wb_connector);
if (!job->fb)
return;
@@ -114,8 +116,7 @@ static void vkms_wb_cleanup_job(struct drm_writeback_connector *connector,
drm_framebuffer_put(vkmsjob->wb_frame_info.fb);
- vkmsdev = drm_device_to_vkms_device(job->fb->dev);
- vkms_set_composer(&vkmsdev->output, false);
+ vkms_set_composer(vkms_output, false);
kfree(vkmsjob);
}
@@ -124,8 +125,7 @@ static void vkms_wb_atomic_commit(struct drm_connector *conn,
{
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 vkms_output *output = drm_crtc_to_vkms_output(connector_state->crtc);
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;
@@ -139,7 +139,7 @@ static void vkms_wb_atomic_commit(struct drm_connector *conn,
if (!conn_state)
return;
- vkms_set_composer(&vkmsdev->output, true);
+ vkms_set_composer(output, true);
active_wb = conn_state->writeback_job->priv;
wb_frame_info = &active_wb->wb_frame_info;
@@ -167,9 +167,10 @@ static const struct drm_connector_helper_funcs vkms_wb_conn_helper_funcs = {
.atomic_check = vkms_wb_atomic_check,
};
-int vkms_enable_writeback_connector(struct vkms_device *vkmsdev)
+int vkms_enable_writeback_connector(struct vkms_device *vkmsdev,
+ struct vkms_output *vkms_output)
{
- struct drm_writeback_connector *wb = &vkmsdev->output.wb_connector;
+ struct drm_writeback_connector *wb = &vkms_output->wb_connector;
drm_connector_helper_add(&wb->base, &vkms_wb_conn_helper_funcs);
--
2.44.2