On 10/9/2023 11:10 AM, Dmitry Baryshkov wrote:
Make MSM HDMI 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/hdmi/hdmi.c | 22 +++++--------------
drivers/gpu/drm/msm/hdmi/hdmi.h | 5 ++---
drivers/gpu/drm/msm/hdmi/hdmi_bridge.c | 30 ++++++++------------------
drivers/gpu/drm/msm/hdmi/hdmi_hpd.c | 3 +--
4 files changed, 17 insertions(+), 43 deletions(-)
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi.c b/drivers/gpu/drm/msm/hdmi/hdmi.c
index b6bcb9f675fe..c8ebd75176bb 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi.c
@@ -160,24 +160,16 @@ static int msm_hdmi_init(struct hdmi *hdmi)
int msm_hdmi_modeset_init(struct hdmi *hdmi,
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;
- }
-
hdmi->dev = dev;
hdmi->encoder = encoder;
hdmi_audio_infoframe_init(&hdmi->audio.infoframe);
- hdmi->bridge = msm_hdmi_bridge_init(hdmi);
- if (IS_ERR(hdmi->bridge)) {
- ret = PTR_ERR(hdmi->bridge);
+ ret = msm_hdmi_bridge_init(hdmi);
+ if (ret) {
DRM_DEV_ERROR(dev->dev, "failed to create HDMI bridge: %d\n", ret);
- hdmi->bridge = NULL;
goto fail;
}
@@ -215,16 +207,9 @@ int msm_hdmi_modeset_init(struct hdmi *hdmi,
goto fail;
}
- priv->bridges[priv->num_bridges++] = hdmi->bridge;
-
return 0;
fail:
- /* bridge is normally destroyed by drm: */
- if (hdmi->bridge) {
- msm_hdmi_bridge_destroy(hdmi->bridge);
- hdmi->bridge = NULL;
- }
if (hdmi->connector) {
hdmi->connector->funcs->destroy(hdmi->connector);
hdmi->connector = NULL;
@@ -395,6 +380,9 @@ static void msm_hdmi_unbind(struct device *dev, struct device *master,
if (priv->hdmi->audio_pdev)
platform_device_unregister(priv->hdmi->audio_pdev);
+ if (priv->hdmi->bridge)
+ msm_hdmi_hpd_disable(priv->hdmi);
+
Now is this the only place where hdmi->bridge is used?
Why cant we just keep msm_hdmi_hpd_disable(priv->hdmi) here since its
anyway protected by if (priv->hdmi) and drop hdmi->bridge completely?
msm_hdmi_destroy(priv->hdmi);
priv->hdmi = NULL;
}
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi.h b/drivers/gpu/drm/msm/hdmi/hdmi.h
index e8dbee50637f..ec5786440391 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi.h
+++ b/drivers/gpu/drm/msm/hdmi/hdmi.h
@@ -224,14 +224,13 @@ void msm_hdmi_audio_set_sample_rate(struct hdmi *hdmi, int rate);
* hdmi bridge:
*/
-struct drm_bridge *msm_hdmi_bridge_init(struct hdmi *hdmi);
-void msm_hdmi_bridge_destroy(struct drm_bridge *bridge);
+int msm_hdmi_bridge_init(struct hdmi *hdmi);
void msm_hdmi_hpd_irq(struct drm_bridge *bridge);
enum drm_connector_status msm_hdmi_bridge_detect(
struct drm_bridge *bridge);
int msm_hdmi_hpd_enable(struct drm_bridge *bridge);
-void msm_hdmi_hpd_disable(struct hdmi_bridge *hdmi_bridge);
+void msm_hdmi_hpd_disable(struct hdmi *hdmi);
/*
* i2c adapter for ddc:
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c b/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
index 9b1391d27ed3..0b7a6a56677e 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
@@ -11,14 +11,6 @@
#include "msm_kms.h"
#include "hdmi.h"
-void msm_hdmi_bridge_destroy(struct drm_bridge *bridge)
-{
- struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);
-
- msm_hdmi_hpd_disable(hdmi_bridge);
- drm_bridge_remove(bridge);
-}
-
static void msm_hdmi_power_on(struct drm_bridge *bridge)
{
struct drm_device *dev = bridge->dev;
@@ -317,7 +309,7 @@ msm_hdmi_hotplug_work(struct work_struct *work)
}
/* initialize bridge */
-struct drm_bridge *msm_hdmi_bridge_init(struct hdmi *hdmi)
+int msm_hdmi_bridge_init(struct hdmi *hdmi)
{
struct drm_bridge *bridge = NULL;
struct hdmi_bridge *hdmi_bridge;
@@ -325,10 +317,8 @@ struct drm_bridge *msm_hdmi_bridge_init(struct hdmi *hdmi)
hdmi_bridge = devm_kzalloc(hdmi->dev->dev,
sizeof(*hdmi_bridge), GFP_KERNEL);
- if (!hdmi_bridge) {
- ret = -ENOMEM;
- goto fail;
- }
+ if (!hdmi_bridge)
+ return -ENOMEM;
hdmi_bridge->hdmi = hdmi;
INIT_WORK(&hdmi_bridge->hpd_work, msm_hdmi_hotplug_work);
@@ -341,17 +331,15 @@ struct drm_bridge *msm_hdmi_bridge_init(struct hdmi *hdmi)
DRM_BRIDGE_OP_DETECT |
DRM_BRIDGE_OP_EDID;
- drm_bridge_add(bridge);
+ ret = devm_drm_bridge_add(&hdmi->pdev->dev, bridge);
+ if (ret)
+ return ret;
ret = drm_bridge_attach(hdmi->encoder, bridge, NULL, DRM_BRIDGE_ATTACH_NO_CONNECTOR);
if (ret)
- goto fail;
+ return ret;
- return bridge;
+ hdmi->bridge = bridge;
-fail:
- if (bridge)
- msm_hdmi_bridge_destroy(bridge);
-
- return ERR_PTR(ret);
+ return 0;
}
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_hpd.c b/drivers/gpu/drm/msm/hdmi/hdmi_hpd.c
index bfa827b47989..9ce0ffa35417 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi_hpd.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi_hpd.c
@@ -147,9 +147,8 @@ int msm_hdmi_hpd_enable(struct drm_bridge *bridge)
return ret;
}
-void msm_hdmi_hpd_disable(struct hdmi_bridge *hdmi_bridge)
+void msm_hdmi_hpd_disable(struct hdmi *hdmi)
{
- struct hdmi *hdmi = hdmi_bridge->hdmi;
const struct hdmi_platform_config *config = hdmi->config;
struct device *dev = &hdmi->pdev->dev;
int ret;
