Hi,
On Fri, Nov 22, 2024 at 05:35:11PM +0100, Louis Chauvet wrote:
> 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>
This one should probably be split further, there's several things going
on right now.
> ---
> drivers/gpu/drm/vkms/vkms_crtc.c | 32 +++++++++++++++++---------------
> drivers/gpu/drm/vkms/vkms_drv.h | 9 +++++----
> drivers/gpu/drm/vkms/vkms_output.c | 26 +++++++++++++++-----------
> drivers/gpu/drm/vkms/vkms_writeback.c | 17 +++++++++--------
> 4 files changed, 46 insertions(+), 38 deletions(-)
>
> diff --git a/drivers/gpu/drm/vkms/vkms_crtc.c b/drivers/gpu/drm/vkms/vkms_crtc.c
> index ace8d293f7da611110c1e117b6cf2f3c9e9b4381..d014dec117e7d4ec7e9e38037a4a4cb4bc6be4ca 100644
> --- a/drivers/gpu/drm/vkms/vkms_crtc.c
> +++ b/drivers/gpu/drm/vkms/vkms_crtc.c
> @@ -84,9 +84,7 @@ static bool vkms_get_vblank_timestamp(struct drm_crtc *crtc,
> int *max_error, ktime_t *vblank_time,
> bool in_vblank_irq)
> {
> - 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)) {
> @@ -279,25 +277,29 @@ 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);
>
> ret = drm_mode_crtc_set_gamma_size(crtc, VKMS_LUT_SIZE);
> if (ret) {
> DRM_ERROR("Failed to set gamma size\n");
> - return ret;
> + return ERR_PTR(ret);
> }
>
> drm_crtc_enable_color_mgmt(crtc, 0, false, VKMS_LUT_SIZE);
> @@ -307,12 +309,12 @@ 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 19fd99b8e506c4454d7878b67f692a0441c22665..fbe7de67fb9c6a6a6964d71b452b9a3ce573e0f8 100644
> --- a/drivers/gpu/drm/vkms/vkms_drv.h
> +++ b/drivers/gpu/drm/vkms/vkms_drv.h
> @@ -214,7 +214,6 @@ struct vkms_config {
> struct vkms_device {
> struct drm_device drm;
> struct platform_device *platform;
> - struct vkms_output output;
> const struct vkms_config *config;
> };
>
> @@ -241,8 +240,9 @@ struct vkms_device {
> * @primary: primary plane to attach to the CRTC
> * @cursor: plane to attach to the 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);
You also need to update the doc.
Maxime
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