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Message-Id: <20241119-vkms-remove-index-v3-1-976321a3f801@bootlin.com>
Date: Tue, 19 Nov 2024 14:34:04 +0100
From: Louis Chauvet <louis.chauvet@...tlin.com>
To: Rodrigo Siqueira <rodrigosiqueiramelo@...il.com>,
Maíra Canal <mairacanal@...eup.net>,
Haneen Mohammed <hamohammed.sa@...il.com>,
Melissa Wen <melissa.srw@...il.com>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,
David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
Simona Vetter <simona.vetter@...ll.ch>
Cc: thomas.petazzoni@...tlin.com, dri-devel@...ts.freedesktop.org,
linux-kernel@...r.kernel.org,
José Expósito <jose.exposito89@...il.com>,
Louis Chauvet <louis.chauvet@...tlin.com>
Subject: [PATCH v3] drm/vkms: Remove index parameter from init_vkms_output
VKMS currently supports only one CRTC, so it make no sense to have this
index configurable. To avoid issues, replace this hardcoded index by
drm_crtc_mask when applicable.
There is no need to manually set a crtc mask on primary and cursor plane
as it is automatically set by drmm_crtc_alloc_with_planes.
In addition, this will remove the use of an uninitialized structure in
vkms_add_overlay_plane. This currently works by chance because two things:
- vkms_plane_init always set a possible_crtcs value, so the problematic
branch is never used;
- drm_crtc_mask on an kzalloc'd drm_crtc returns BIT(0), and the VKMS CRTC
always have this id.
Signed-off-by: Louis Chauvet <louis.chauvet@...tlin.com>
---
Changes in v3:
- Rebased on drm-misc-next
- Link to v2: https://lore.kernel.org/r/20241010-vkms-remove-index-v2-1-6b8d6cfd5a15@bootlin.com
Changes in v2:
- Applied comments from José
- Link to v1: https://lore.kernel.org/r/20240906-vkms-remove-index-v1-1-3cfedd8ccb2f@bootlin.com
---
drivers/gpu/drm/vkms/vkms_drv.c | 2 +-
drivers/gpu/drm/vkms/vkms_drv.h | 8 ++-----
drivers/gpu/drm/vkms/vkms_output.c | 49 +++++++++++++-------------------------
drivers/gpu/drm/vkms/vkms_plane.c | 4 ++--
4 files changed, 21 insertions(+), 42 deletions(-)
diff --git a/drivers/gpu/drm/vkms/vkms_drv.c b/drivers/gpu/drm/vkms/vkms_drv.c
index bab13943d8e0085bed85092d7bc8727d834768a9..e4ae69d9ef871c9ce436ad0bd8c6551d8fe7f55c 100644
--- a/drivers/gpu/drm/vkms/vkms_drv.c
+++ b/drivers/gpu/drm/vkms/vkms_drv.c
@@ -174,7 +174,7 @@ static int vkms_modeset_init(struct vkms_device *vkmsdev)
dev->mode_config.preferred_depth = 0;
dev->mode_config.helper_private = &vkms_mode_config_helpers;
- return vkms_output_init(vkmsdev, 0);
+ return vkms_output_init(vkmsdev);
}
static int vkms_create(struct vkms_config *config)
diff --git a/drivers/gpu/drm/vkms/vkms_drv.h b/drivers/gpu/drm/vkms/vkms_drv.h
index 672fe191e239c03e7358d43eb19215361417a781..036101ee4ea1cb0a335cd2ea78a8ca9da87fbe93 100644
--- a/drivers/gpu/drm/vkms/vkms_drv.h
+++ b/drivers/gpu/drm/vkms/vkms_drv.h
@@ -212,21 +212,17 @@ int vkms_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
* vkms_output_init() - Initialize all sub-components needed for a VKMS device.
*
* @vkmsdev: VKMS device to initialize
- * @index: CRTC which can be attached to the planes. The caller must ensure that
- * @index is positive and less or equals to 31.
*/
-int vkms_output_init(struct vkms_device *vkmsdev, int index);
+int vkms_output_init(struct vkms_device *vkmsdev);
/**
* vkms_plane_init() - Initialize a plane
*
* @vkmsdev: VKMS device containing the plane
* @type: type of plane to initialize
- * @index: CRTC which can be attached to the plane. The caller must ensure that
- * @index is positive and less or equals to 31.
*/
struct vkms_plane *vkms_plane_init(struct vkms_device *vkmsdev,
- enum drm_plane_type type, int index);
+ enum drm_plane_type type);
/* CRC Support */
const char *const *vkms_get_crc_sources(struct drm_crtc *crtc,
diff --git a/drivers/gpu/drm/vkms/vkms_output.c b/drivers/gpu/drm/vkms/vkms_output.c
index 25a99fde126c7402941954015287ab0887484139..8f4bd5aef087b459d37d0cbbf90fe0145090917a 100644
--- a/drivers/gpu/drm/vkms/vkms_output.c
+++ b/drivers/gpu/drm/vkms/vkms_output.c
@@ -32,29 +32,14 @@ static const struct drm_connector_helper_funcs vkms_conn_helper_funcs = {
.get_modes = vkms_conn_get_modes,
};
-static int vkms_add_overlay_plane(struct vkms_device *vkmsdev, int index,
- struct drm_crtc *crtc)
-{
- struct vkms_plane *overlay;
-
- overlay = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_OVERLAY, index);
- if (IS_ERR(overlay))
- return PTR_ERR(overlay);
-
- if (!overlay->base.possible_crtcs)
- overlay->base.possible_crtcs = drm_crtc_mask(crtc);
-
- return 0;
-}
-
-int vkms_output_init(struct vkms_device *vkmsdev, int index)
+int vkms_output_init(struct vkms_device *vkmsdev)
{
struct vkms_output *output = &vkmsdev->output;
struct drm_device *dev = &vkmsdev->drm;
struct drm_connector *connector = &output->connector;
struct drm_encoder *encoder = &output->encoder;
struct drm_crtc *crtc = &output->crtc;
- struct vkms_plane *primary, *cursor = NULL;
+ struct vkms_plane *primary, *overlay, *cursor = NULL;
int ret;
int writeback;
unsigned int n;
@@ -65,29 +50,31 @@ int vkms_output_init(struct vkms_device *vkmsdev, int index)
* The overlay and cursor planes are not mandatory, but can be used to perform complex
* composition.
*/
- primary = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_PRIMARY, index);
+ primary = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_PRIMARY);
if (IS_ERR(primary))
return PTR_ERR(primary);
- if (vkmsdev->config->overlay) {
- for (n = 0; n < NUM_OVERLAY_PLANES; n++) {
- ret = vkms_add_overlay_plane(vkmsdev, index, crtc);
- if (ret)
- return ret;
- }
- }
-
if (vkmsdev->config->cursor) {
- cursor = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_CURSOR, index);
+ cursor = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_CURSOR);
if (IS_ERR(cursor))
return PTR_ERR(cursor);
}
- /* [1]: Allocation of a CRTC, its index will be BIT(0) = 1 */
ret = vkms_crtc_init(dev, crtc, &primary->base, &cursor->base);
if (ret)
return ret;
+ 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)) {
+ DRM_DEV_ERROR(dev->dev, "Failed to init vkms plane\n");
+ return PTR_ERR(overlay);
+ }
+ overlay->base.possible_crtcs = drm_crtc_mask(crtc);
+ }
+ }
+
ret = drm_connector_init(dev, connector, &vkms_connector_funcs,
DRM_MODE_CONNECTOR_VIRTUAL);
if (ret) {
@@ -103,11 +90,7 @@ int vkms_output_init(struct vkms_device *vkmsdev, int index)
DRM_ERROR("Failed to init encoder\n");
goto err_encoder;
}
- /*
- * This is a hardcoded value to select crtc for the encoder.
- * BIT(0) here designate the first registered CRTC, the one allocated in [1]
- */
- encoder->possible_crtcs = BIT(0);
+ encoder->possible_crtcs = drm_crtc_mask(crtc);
ret = drm_connector_attach_encoder(connector, encoder);
if (ret) {
diff --git a/drivers/gpu/drm/vkms/vkms_plane.c b/drivers/gpu/drm/vkms/vkms_plane.c
index e5c625ab8e3e06cb95f468c59bc3b06ef85eab6f..ad137c9a75f5e9ee3bb62e7bb2c5e3684a6ecbb6 100644
--- a/drivers/gpu/drm/vkms/vkms_plane.c
+++ b/drivers/gpu/drm/vkms/vkms_plane.c
@@ -198,12 +198,12 @@ static const struct drm_plane_helper_funcs vkms_plane_helper_funcs = {
};
struct vkms_plane *vkms_plane_init(struct vkms_device *vkmsdev,
- enum drm_plane_type type, int index)
+ enum drm_plane_type type)
{
struct drm_device *dev = &vkmsdev->drm;
struct vkms_plane *plane;
- plane = drmm_universal_plane_alloc(dev, struct vkms_plane, base, 1 << index,
+ plane = drmm_universal_plane_alloc(dev, struct vkms_plane, base, 0,
&vkms_plane_funcs,
vkms_formats, ARRAY_SIZE(vkms_formats),
NULL, type, NULL);
---
base-commit: 7d2faa8dbb7055a115fe0cd6068d7090094a573d
change-id: 20240906-vkms-remove-index-3a6e04c38e02
Best regards,
--
Louis Chauvet <louis.chauvet@...tlin.com>
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