[PATCH v3] drm/vkms: Add overlay plane support
Rodrigo Siqueira
rodrigosiqueiramelo at gmail.com
Sun Mar 10 15:29:54 UTC 2019
Hi,
Thanks for your patch.
You can see my comments inline.
On 03/09, Mamta Shukla wrote:
> Add overlay plane support in vkms aligned with cursor and primary
> plane with module option 'enable_overlay' to enable/disable overlay
> plane while testing.
>
> This currently passes plane-position-covered-pipe-A-plane subtest
> from IGT kms_plane test.
What the difference of running this test with and without your patch?
This test pass without your patch as well. Additionally, I briefly
looked at the test, and l could not get confident that
"plane-position-covered-pipe-A-plane" validate overlays. Did I miss
something?
> Signed-off-by: Mamta Shukla <mamtashukla555 at gmail.com>
> ---
> changes in v3:
> -Fix spelling mistake 'palne'->'plane'
> -Use switch case
> -Use logical operator '||' in place of '|'
>
> change in v2:
> -Fix warning: return makes pointer from integer without a cast using
> ERR_PTR
>
> drivers/gpu/drm/vkms/vkms_crc.c | 42 +++++++++++++++++++++++++++----
> drivers/gpu/drm/vkms/vkms_drv.c | 4 +++
> drivers/gpu/drm/vkms/vkms_drv.h | 8 ++++++
> drivers/gpu/drm/vkms/vkms_plane.c | 36 +++++++++++++++++++++++++-
> 4 files changed, 84 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/gpu/drm/vkms/vkms_crc.c b/drivers/gpu/drm/vkms/vkms_crc.c
> index 4dd6c155363d..82bfee7c79b5 100644
> --- a/drivers/gpu/drm/vkms/vkms_crc.c
> +++ b/drivers/gpu/drm/vkms/vkms_crc.c
> @@ -109,6 +109,26 @@ static void blend(void *vaddr_dst, void *vaddr_src,
> }
> }
>
> +static void compose_overlay(struct vkms_crc_data *overlay_crc,
> + struct vkms_crc_data *primary_crc, void *vaddr_out)
> +{
> + struct drm_gem_object *overlay_obj;
> + struct vkms_gem_object *overlay_vkms_obj;
> +
> + overlay_obj = drm_gem_fb_get_obj(&overlay_crc->fb, 0);
> + overlay_vkms_obj = drm_gem_to_vkms_gem(overlay_obj);
> + mutex_lock(&overlay_vkms_obj->pages_lock);
> + if (!overlay_vkms_obj->vaddr) {
> + DRM_WARN("overlay plane vaddr is NULL");
> + goto out;
> + }
> +
> + blend(vaddr_out, overlay_vkms_obj->vaddr, primary_crc, overlay_crc);
> +
> +out:
> + mutex_unlock(&overlay_vkms_obj->pages_lock);
> +}
> +
> static void compose_cursor(struct vkms_crc_data *cursor_crc,
> struct vkms_crc_data *primary_crc, void *vaddr_out)
> {
> @@ -131,7 +151,8 @@ static void compose_cursor(struct vkms_crc_data *cursor_crc,
> }
>
> static uint32_t _vkms_get_crc(struct vkms_crc_data *primary_crc,
> - struct vkms_crc_data *cursor_crc)
> + struct vkms_crc_data *cursor_crc,
> + struct vkms_crc_data *overlay_crc)
> {
> struct drm_framebuffer *fb = &primary_crc->fb;
> struct drm_gem_object *gem_obj = drm_gem_fb_get_obj(fb, 0);
> @@ -154,6 +175,8 @@ static uint32_t _vkms_get_crc(struct vkms_crc_data *primary_crc,
> memcpy(vaddr_out, vkms_obj->vaddr, vkms_obj->gem.size);
> mutex_unlock(&vkms_obj->pages_lock);
>
> + if (overlay_crc)
> + compose_overlay(overlay_crc, primary_crc, vaddr_out);
> if (cursor_crc)
> compose_cursor(cursor_crc, primary_crc, vaddr_out);
>
> @@ -184,6 +207,7 @@ void vkms_crc_work_handle(struct work_struct *work)
> output);
> struct vkms_crc_data *primary_crc = NULL;
> struct vkms_crc_data *cursor_crc = NULL;
> + struct vkms_crc_data *overlay_crc = NULL;
> struct drm_plane *plane;
> u32 crc32 = 0;
> u64 frame_start, frame_end;
> @@ -208,14 +232,22 @@ void vkms_crc_work_handle(struct work_struct *work)
> if (drm_framebuffer_read_refcount(&crc_data->fb) == 0)
> continue;
>
> - if (plane->type == DRM_PLANE_TYPE_PRIMARY)
> + switch (plane->type) {
> + case DRM_PLANE_TYPE_PRIMARY:
> primary_crc = crc_data;
> - else
> + break;
> + case DRM_PLANE_TYPE_CURSOR:
> cursor_crc = crc_data;
> + break;
> + case DRM_PLANE_TYPE_OVERLAY:
> + overlay_crc = crc_data;
> + break;
> + }
> }
>
> - if (primary_crc)
> - crc32 = _vkms_get_crc(primary_crc, cursor_crc);
> + if (primary_crc) {
> + crc32 = _vkms_get_crc(primary_crc, cursor_crc, overlay_crc);
> + }
Please, remember to use checkpatch in your patches before sending them.
> frame_end = drm_crtc_accurate_vblank_count(crtc);
>
> diff --git a/drivers/gpu/drm/vkms/vkms_drv.c b/drivers/gpu/drm/vkms/vkms_drv.c
> index 738dd6206d85..b08ad6f95675 100644
> --- a/drivers/gpu/drm/vkms/vkms_drv.c
> +++ b/drivers/gpu/drm/vkms/vkms_drv.c
> @@ -29,6 +29,10 @@ bool enable_cursor;
> module_param_named(enable_cursor, enable_cursor, bool, 0444);
> MODULE_PARM_DESC(enable_cursor, "Enable/Disable cursor support");
>
> +bool enable_overlay;
> +module_param_named(enable_overlay, enable_overlay, bool, 0444);
> +MODULE_PARM_DESC(enable_overlay, "Enable/Disable overlay support");
> +
> static const struct file_operations vkms_driver_fops = {
> .owner = THIS_MODULE,
> .open = drm_open,
> diff --git a/drivers/gpu/drm/vkms/vkms_drv.h b/drivers/gpu/drm/vkms/vkms_drv.h
> index 81f1cfbeb936..6861dbee01fd 100644
> --- a/drivers/gpu/drm/vkms/vkms_drv.h
> +++ b/drivers/gpu/drm/vkms/vkms_drv.h
> @@ -20,6 +20,8 @@
>
> extern bool enable_cursor;
>
> +extern bool enable_overlay;
> +
> static const u32 vkms_formats[] = {
> DRM_FORMAT_XRGB8888,
> };
> @@ -28,6 +30,10 @@ static const u32 vkms_cursor_formats[] = {
> DRM_FORMAT_ARGB8888,
> };
>
> +static const u32 vkms_overlay_formats[] = {
> + DRM_FORMAT_ARGB8888,
> +};
> +
> struct vkms_crc_data {
> struct drm_framebuffer fb;
> struct drm_rect src, dst;
> @@ -118,6 +124,8 @@ int vkms_output_init(struct vkms_device *vkmsdev);
> struct drm_plane *vkms_plane_init(struct vkms_device *vkmsdev,
> enum drm_plane_type type);
>
> +struct drm_plane *vkms_overlay_init(struct vkms_device *vkmsdev);
> +
> /* Gem stuff */
> struct drm_gem_object *vkms_gem_create(struct drm_device *dev,
> struct drm_file *file,
> diff --git a/drivers/gpu/drm/vkms/vkms_plane.c b/drivers/gpu/drm/vkms/vkms_plane.c
> index 0e67d2d42f0c..090b21a2afab 100644
> --- a/drivers/gpu/drm/vkms/vkms_plane.c
> +++ b/drivers/gpu/drm/vkms/vkms_plane.c
> @@ -114,7 +114,7 @@ static int vkms_plane_atomic_check(struct drm_plane *plane,
> if (IS_ERR(crtc_state))
> return PTR_ERR(crtc_state);
>
> - if (plane->type == DRM_PLANE_TYPE_CURSOR)
> + if ((plane->type == DRM_PLANE_TYPE_CURSOR) || (plane->type == DRM_PLANE_TYPE_OVERLAY))
> can_position = true;
>
> ret = drm_atomic_helper_check_plane_state(state, crtc_state,
> @@ -167,6 +167,40 @@ static const struct drm_plane_helper_funcs vkms_primary_helper_funcs = {
> .cleanup_fb = vkms_cleanup_fb,
> };
>
> +struct drm_plane *vkms_overlay_init(struct vkms_device *vkmsdev)
> +{
> + struct drm_device *dev = &vkmsdev->drm;
> + const struct drm_plane_helper_funcs *funcs;
> + struct drm_plane *overlay;
> + const u32 *formats;
> + int ret, nformats;
> + unsigned int blend_caps = BIT(DRM_MODE_BLEND_PIXEL_NONE) |
> + BIT(DRM_MODE_BLEND_PREMULTI);
> +
> + overlay = kzalloc(sizeof(*overlay), GFP_KERNEL);
> + if (!overlay)
> + return ERR_PTR(-ENOMEM);
> +
> + formats = vkms_overlay_formats;
> + nformats = ARRAY_SIZE(vkms_overlay_formats);
> + funcs = &vkms_primary_helper_funcs;
> + drm_plane_helper_add(overlay, funcs);
> + drm_plane_create_alpha_property(overlay);
> + drm_plane_create_blend_mode_property(overlay, blend_caps);
> +
> + ret = drm_universal_plane_init(dev, overlay, 0,
> + &vkms_plane_funcs,
> + formats, nformats,
> + NULL,
> + DRM_PLANE_TYPE_OVERLAY, NULL);
> + if (ret) {
> + kfree(overlay);
> + return ERR_PTR(ret);
> + }
> +
IMHO you don't need to create a new function just for overlays
initialization, because we already have a function named
vkms_plane_init() that centralizes the responsibility of initializing
planes. It could be better if you extend vkms_plane_init() to make it
handle overlays.
Additionally, I think you never initialized overlays in your patch. You
have the initialization function, but no ones invoke it. Am I right or I
missed something?
Best Regards
> + return overlay;
> +}
> +
> struct drm_plane *vkms_plane_init(struct vkms_device *vkmsdev,
> enum drm_plane_type type)
> {
> --
> 2.17.1
>
--
Rodrigo Siqueira
https://siqueira.tech
Graduate Student
Department of Computer Science
University of São Paulo
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