On 09/10/2023 21:39, Abhinav Kumar wrote:
On 10/9/2023 11:10 AM, Dmitry Baryshkov wrote:
Make MSM DSI driver use devm_drm_bridge_add() instead of plain
drm_bridge_add(). As the driver doesn't require any additional cleanup,
stop adding created bridge to the priv->bridges array.
Reviewed-by: Rob Clark <robdclark@xxxxxxxxx>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
---
drivers/gpu/drm/msm/dsi/dsi.c | 28 +++++--------------------
drivers/gpu/drm/msm/dsi/dsi.h | 3 +--
drivers/gpu/drm/msm/dsi/dsi_manager.c | 30 +++++++++------------------
3 files changed, 16 insertions(+), 45 deletions(-)
diff --git a/drivers/gpu/drm/msm/dsi/dsi.c
b/drivers/gpu/drm/msm/dsi/dsi.c
index d45e43024802..47f327e68471 100644
--- a/drivers/gpu/drm/msm/dsi/dsi.c
+++ b/drivers/gpu/drm/msm/dsi/dsi.c
@@ -215,20 +215,14 @@ void __exit msm_dsi_unregister(void)
int msm_dsi_modeset_init(struct msm_dsi *msm_dsi, struct drm_device
*dev,
struct drm_encoder *encoder)
{
- struct msm_drm_private *priv = dev->dev_private;
int ret;
- if (priv->num_bridges == ARRAY_SIZE(priv->bridges)) {
- DRM_DEV_ERROR(dev->dev, "too many bridges\n");
- return -ENOSPC;
- }
-
msm_dsi->dev = dev;
ret = msm_dsi_host_modeset_init(msm_dsi->host, dev);
if (ret) {
DRM_DEV_ERROR(dev->dev, "failed to modeset init host: %d\n",
ret);
- goto fail;
+ return ret;
}
if (msm_dsi_is_bonded_dsi(msm_dsi) &&
@@ -242,32 +236,20 @@ int msm_dsi_modeset_init(struct msm_dsi
*msm_dsi, struct drm_device *dev,
msm_dsi->encoder = encoder;
- msm_dsi->bridge = msm_dsi_manager_bridge_init(msm_dsi->id);
- if (IS_ERR(msm_dsi->bridge)) {
- ret = PTR_ERR(msm_dsi->bridge);
+ ret = msm_dsi_manager_bridge_init(msm_dsi);
+ if (ret) {
DRM_DEV_ERROR(dev->dev, "failed to create dsi bridge: %d\n",
ret);
- msm_dsi->bridge = NULL;
- goto fail;
+ return ret;
}
ret = msm_dsi_manager_ext_bridge_init(msm_dsi->id);
if (ret) {
DRM_DEV_ERROR(dev->dev,
"failed to create dsi connector: %d\n", ret);
- goto fail;
+ return ret;
}
- priv->bridges[priv->num_bridges++] = msm_dsi->bridge;
-
return 0;
-fail:
- /* bridge/connector are normally destroyed by drm: */
- if (msm_dsi->bridge) {
- msm_dsi_manager_bridge_destroy(msm_dsi->bridge);
- msm_dsi->bridge = NULL;
- }
We can drop msm_dsi_manager_bridge_destroy() now but dont we need to
keep the part to reset msm_dsi->bridge to NULL in the fail tag if
msm_dsi_manager_ext_bridge_init() fails?
What for? This field is not read in the error /unbinding path.
I'll send a followup that drops msm_dsi->bridge completely.
-
- return ret;
}
void msm_dsi_snapshot(struct msm_disp_state *disp_state, struct
msm_dsi *msm_dsi)
diff --git a/drivers/gpu/drm/msm/dsi/dsi.h
b/drivers/gpu/drm/msm/dsi/dsi.h
index d21867da78b8..a01c326774a6 100644
--- a/drivers/gpu/drm/msm/dsi/dsi.h
+++ b/drivers/gpu/drm/msm/dsi/dsi.h
@@ -56,8 +56,7 @@ struct msm_dsi {
};
/* dsi manager */
-struct drm_bridge *msm_dsi_manager_bridge_init(u8 id);
-void msm_dsi_manager_bridge_destroy(struct drm_bridge *bridge);
+int msm_dsi_manager_bridge_init(struct msm_dsi *msm_dsi);
int msm_dsi_manager_ext_bridge_init(u8 id);
int msm_dsi_manager_cmd_xfer(int id, const struct mipi_dsi_msg *msg);
bool msm_dsi_manager_cmd_xfer_trigger(int id, u32 dma_base, u32 len);
diff --git a/drivers/gpu/drm/msm/dsi/dsi_manager.c
b/drivers/gpu/drm/msm/dsi/dsi_manager.c
index 28b8012a21f2..17aa19bb6510 100644
--- a/drivers/gpu/drm/msm/dsi/dsi_manager.c
+++ b/drivers/gpu/drm/msm/dsi/dsi_manager.c
@@ -466,9 +466,8 @@ static const struct drm_bridge_funcs
dsi_mgr_bridge_funcs = {
};
/* initialize bridge */
-struct drm_bridge *msm_dsi_manager_bridge_init(u8 id)
+int msm_dsi_manager_bridge_init(struct msm_dsi *msm_dsi)
{
- struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
struct drm_bridge *bridge = NULL;
struct dsi_bridge *dsi_bridge;
struct drm_encoder *encoder;
@@ -476,31 +475,27 @@ struct drm_bridge
*msm_dsi_manager_bridge_init(u8 id)
dsi_bridge = devm_kzalloc(msm_dsi->dev->dev,
sizeof(*dsi_bridge), GFP_KERNEL);
- if (!dsi_bridge) {
- ret = -ENOMEM;
- goto fail;
- }
+ if (!dsi_bridge)
+ return -ENOMEM;
- dsi_bridge->id = id;
+ dsi_bridge->id = msm_dsi->id;
encoder = msm_dsi->encoder;
bridge = &dsi_bridge->base;
bridge->funcs = &dsi_mgr_bridge_funcs;
- drm_bridge_add(bridge);
+ ret = devm_drm_bridge_add(&msm_dsi->pdev->dev, bridge);
+ if (ret)
+ return ret;
ret = drm_bridge_attach(encoder, bridge, NULL, 0);
if (ret)
- goto fail;
+ return ret;
- return bridge;
+ msm_dsi->bridge = bridge;
-fail:
- if (bridge)
- msm_dsi_manager_bridge_destroy(bridge);
-
- return ERR_PTR(ret);
+ return 0;
}
int msm_dsi_manager_ext_bridge_init(u8 id)
@@ -557,11 +552,6 @@ int msm_dsi_manager_ext_bridge_init(u8 id)
return 0;
}
-void msm_dsi_manager_bridge_destroy(struct drm_bridge *bridge)
-{
- drm_bridge_remove(bridge);
-}
-
int msm_dsi_manager_cmd_xfer(int id, const struct mipi_dsi_msg *msg)
{
struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
--
With best wishes
Dmitry
