[RFC PATCH 3/3] drm/vkms: add overlay support
Melissa Wen
melissa.srw at gmail.com
Sat Feb 20 14:42:12 UTC 2021
Add support to overlay plane, in addition to primary and cursor
planes. In this approach, the plane composition still requires an
active primary plane and planes are composed associatively in the
order: (primary <- overlay) <- cursor
It enables to run the following IGT tests successfully:
- kms_plane_cursor:
- pipe-A-[overlay, primary, viewport]-size-[64, 128, 256]
- kms_atomic:
- plane-overlay-legacy
and preserves the successful execution of kms_cursor_crc,
kms_writeback and kms_flip
Signed-off-by: Melissa Wen <melissa.srw at gmail.com>
---
drivers/gpu/drm/vkms/vkms_composer.c | 27 +++++++++++++++++----------
drivers/gpu/drm/vkms/vkms_drv.c | 5 +++++
drivers/gpu/drm/vkms/vkms_drv.h | 1 +
drivers/gpu/drm/vkms/vkms_output.c | 17 +++++++++++++++--
drivers/gpu/drm/vkms/vkms_plane.c | 20 +++++++++++++++-----
5 files changed, 53 insertions(+), 17 deletions(-)
diff --git a/drivers/gpu/drm/vkms/vkms_composer.c b/drivers/gpu/drm/vkms/vkms_composer.c
index be8f1d33c645..2116da9b5a43 100644
--- a/drivers/gpu/drm/vkms/vkms_composer.c
+++ b/drivers/gpu/drm/vkms/vkms_composer.c
@@ -144,11 +144,12 @@ static void compose_planes(struct vkms_composer *primary_composer,
static int composite(void **vaddr_out,
struct vkms_composer *primary_composer,
- struct vkms_composer *cursor_composer)
+ struct vkms_crtc_state *crtc_state)
{
struct drm_framebuffer *fb = &primary_composer->fb;
struct drm_gem_object *gem_obj = drm_gem_fb_get_obj(fb, 0);
struct drm_gem_shmem_object *shmem_obj = to_drm_gem_shmem_obj(gem_obj);
+ int i;
if (!*vaddr_out) {
*vaddr_out = kzalloc(shmem_obj->base.size, GFP_KERNEL);
@@ -163,8 +164,14 @@ static int composite(void **vaddr_out,
memcpy(*vaddr_out, shmem_obj->vaddr, shmem_obj->base.size);
- if (cursor_composer)
- compose_planes(primary_composer, cursor_composer, *vaddr_out);
+ /* If there are other planes besides primary, we consider the active
+ * planes should be in z-order and compose them associatively:
+ * ((primary <- overlay) <- cursor)
+ */
+ for (i = 1; i < crtc_state->num_active_planes; i++)
+ compose_planes(primary_composer,
+ crtc_state->active_planes[i]->composer,
+ *vaddr_out);
return 0;
}
@@ -186,7 +193,7 @@ void vkms_composer_worker(struct work_struct *work)
struct drm_crtc *crtc = crtc_state->base.crtc;
struct vkms_output *out = drm_crtc_to_vkms_output(crtc);
struct vkms_composer *primary_composer = NULL;
- struct vkms_composer *cursor_composer = NULL;
+ struct vkms_plane_state *act_plane = NULL;
bool crc_pending, wb_pending;
void *vaddr_out = NULL;
u32 crc32 = 0;
@@ -210,11 +217,11 @@ void vkms_composer_worker(struct work_struct *work)
if (!crc_pending)
return;
- if (crtc_state->num_active_planes >= 1)
- primary_composer = crtc_state->active_planes[0]->composer;
-
- if (crtc_state->num_active_planes == 2)
- cursor_composer = crtc_state->active_planes[1]->composer;
+ if (crtc_state->num_active_planes >= 1) {
+ act_plane = crtc_state->active_planes[0];
+ if (act_plane->base.plane->type == DRM_PLANE_TYPE_PRIMARY)
+ primary_composer = act_plane->composer;
+ }
if (!primary_composer)
return;
@@ -222,7 +229,7 @@ void vkms_composer_worker(struct work_struct *work)
if (wb_pending)
vaddr_out = crtc_state->active_writeback;
- ret = composite(&vaddr_out, primary_composer, cursor_composer);
+ ret = composite(&vaddr_out, primary_composer, crtc_state);
if (ret) {
if (ret == -EINVAL && !wb_pending)
kfree(vaddr_out);
diff --git a/drivers/gpu/drm/vkms/vkms_drv.c b/drivers/gpu/drm/vkms/vkms_drv.c
index 2173b82606f6..027ffe759440 100644
--- a/drivers/gpu/drm/vkms/vkms_drv.c
+++ b/drivers/gpu/drm/vkms/vkms_drv.c
@@ -44,6 +44,10 @@ static bool enable_writeback = true;
module_param_named(enable_writeback, enable_writeback, bool, 0444);
MODULE_PARM_DESC(enable_writeback, "Enable/Disable writeback connector support");
+static bool enable_overlay;
+module_param_named(enable_overlay, enable_overlay, bool, 0444);
+MODULE_PARM_DESC(enable_overlay, "Enable/Disable overlay support");
+
DEFINE_DRM_GEM_FOPS(vkms_driver_fops);
static void vkms_release(struct drm_device *dev)
@@ -198,6 +202,7 @@ static int __init vkms_init(void)
config->cursor = enable_cursor;
config->writeback = enable_writeback;
+ config->overlay = enable_overlay;
return vkms_create(config);
}
diff --git a/drivers/gpu/drm/vkms/vkms_drv.h b/drivers/gpu/drm/vkms/vkms_drv.h
index 9ad5ad8b7737..784219da8df0 100644
--- a/drivers/gpu/drm/vkms/vkms_drv.h
+++ b/drivers/gpu/drm/vkms/vkms_drv.h
@@ -85,6 +85,7 @@ struct vkms_device;
struct vkms_config {
bool writeback;
bool cursor;
+ bool overlay;
/* only set when instantiated */
struct vkms_device *dev;
};
diff --git a/drivers/gpu/drm/vkms/vkms_output.c b/drivers/gpu/drm/vkms/vkms_output.c
index 05d3bb45e6c1..c60d0f2e7a37 100644
--- a/drivers/gpu/drm/vkms/vkms_output.c
+++ b/drivers/gpu/drm/vkms/vkms_output.c
@@ -39,7 +39,7 @@ int vkms_output_init(struct vkms_device *vkmsdev, int index)
struct drm_connector *connector = &output->connector;
struct drm_encoder *encoder = &output->encoder;
struct drm_crtc *crtc = &output->crtc;
- struct drm_plane *primary, *cursor = NULL;
+ struct drm_plane *primary, *cursor = NULL, *overlay = NULL;
int ret;
int writeback;
@@ -51,6 +51,16 @@ int vkms_output_init(struct vkms_device *vkmsdev, int index)
if (ret)
goto err_crtc;
+ if (vkmsdev->config->overlay) {
+ overlay = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_OVERLAY, index);
+ if (IS_ERR(overlay)) {
+ ret = PTR_ERR(overlay);
+ goto err_overlay;
+ }
+ if (overlay && !overlay->possible_crtcs)
+ overlay->possible_crtcs = drm_crtc_mask(crtc);
+ }
+
if (vkmsdev->config->cursor) {
cursor = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_CURSOR, index);
if (IS_ERR(cursor)) {
@@ -58,7 +68,6 @@ int vkms_output_init(struct vkms_device *vkmsdev, int index)
goto err_cursor;
}
}
-
crtc->cursor = cursor;
if (cursor && !cursor->possible_crtcs)
cursor->possible_crtcs = drm_crtc_mask(crtc);
@@ -108,6 +117,10 @@ int vkms_output_init(struct vkms_device *vkmsdev, int index)
if (vkmsdev->config->cursor)
drm_plane_cleanup(cursor);
+err_overlay:
+ if (vkmsdev->config->overlay)
+ drm_plane_cleanup(overlay);
+
err_crtc:
drm_plane_cleanup(primary);
diff --git a/drivers/gpu/drm/vkms/vkms_plane.c b/drivers/gpu/drm/vkms/vkms_plane.c
index 0824327cc860..8e7bb84bc894 100644
--- a/drivers/gpu/drm/vkms/vkms_plane.c
+++ b/drivers/gpu/drm/vkms/vkms_plane.c
@@ -19,6 +19,11 @@ static const u32 vkms_cursor_formats[] = {
DRM_FORMAT_ARGB8888,
};
+static const u32 vkms_overlay_formats[] = {
+ DRM_FORMAT_ARGB8888,
+ DRM_FORMAT_XRGB8888,
+};
+
static struct drm_plane_state *
vkms_plane_duplicate_state(struct drm_plane *plane)
{
@@ -127,7 +132,7 @@ 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_PRIMARY)
can_position = true;
ret = drm_atomic_helper_check_plane_state(state, crtc_state,
@@ -195,14 +200,19 @@ struct drm_plane *vkms_plane_init(struct vkms_device *vkmsdev,
int ret, nformats;
plane = kzalloc(sizeof(*plane), GFP_KERNEL);
- if (!plane)
- return ERR_PTR(-ENOMEM);
- if (type == DRM_PLANE_TYPE_CURSOR) {
+ switch (type) {
+ case DRM_PLANE_TYPE_CURSOR:
formats = vkms_cursor_formats;
nformats = ARRAY_SIZE(vkms_cursor_formats);
funcs = &vkms_primary_helper_funcs;
- } else {
+ break;
+ case DRM_PLANE_TYPE_OVERLAY:
+ formats = vkms_overlay_formats;
+ nformats = ARRAY_SIZE(vkms_overlay_formats);
+ funcs = &vkms_primary_helper_funcs;
+ break;
+ default:
formats = vkms_formats;
nformats = ARRAY_SIZE(vkms_formats);
funcs = &vkms_primary_helper_funcs;
--
2.30.0
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