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path: root/kernel/drivers/gpu/drm/msm/dsi/dsi.c
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Diffstat (limited to 'kernel/drivers/gpu/drm/msm/dsi/dsi.c')
-rw-r--r--kernel/drivers/gpu/drm/msm/dsi/dsi.c99
1 files changed, 76 insertions, 23 deletions
diff --git a/kernel/drivers/gpu/drm/msm/dsi/dsi.c b/kernel/drivers/gpu/drm/msm/dsi/dsi.c
index ad50b8022..6edcd6f57 100644
--- a/kernel/drivers/gpu/drm/msm/dsi/dsi.c
+++ b/kernel/drivers/gpu/drm/msm/dsi/dsi.c
@@ -15,20 +15,55 @@
struct drm_encoder *msm_dsi_get_encoder(struct msm_dsi *msm_dsi)
{
- if (!msm_dsi || !msm_dsi->panel)
+ if (!msm_dsi || !msm_dsi_device_connected(msm_dsi))
return NULL;
- return (msm_dsi->panel_flags & MIPI_DSI_MODE_VIDEO) ?
+ return (msm_dsi->device_flags & MIPI_DSI_MODE_VIDEO) ?
msm_dsi->encoders[MSM_DSI_VIDEO_ENCODER_ID] :
msm_dsi->encoders[MSM_DSI_CMD_ENCODER_ID];
}
+static int dsi_get_phy(struct msm_dsi *msm_dsi)
+{
+ struct platform_device *pdev = msm_dsi->pdev;
+ struct platform_device *phy_pdev;
+ struct device_node *phy_node;
+
+ phy_node = of_parse_phandle(pdev->dev.of_node, "qcom,dsi-phy", 0);
+ if (!phy_node) {
+ dev_err(&pdev->dev, "cannot find phy device\n");
+ return -ENXIO;
+ }
+
+ phy_pdev = of_find_device_by_node(phy_node);
+ if (phy_pdev)
+ msm_dsi->phy = platform_get_drvdata(phy_pdev);
+
+ of_node_put(phy_node);
+
+ if (!phy_pdev || !msm_dsi->phy) {
+ dev_err(&pdev->dev, "%s: phy driver is not ready\n", __func__);
+ return -EPROBE_DEFER;
+ }
+
+ msm_dsi->phy_dev = get_device(&phy_pdev->dev);
+
+ return 0;
+}
+
static void dsi_destroy(struct msm_dsi *msm_dsi)
{
if (!msm_dsi)
return;
msm_dsi_manager_unregister(msm_dsi);
+
+ if (msm_dsi->phy_dev) {
+ put_device(msm_dsi->phy_dev);
+ msm_dsi->phy = NULL;
+ msm_dsi->phy_dev = NULL;
+ }
+
if (msm_dsi->host) {
msm_dsi_host_destroy(msm_dsi->host);
msm_dsi->host = NULL;
@@ -39,20 +74,15 @@ static void dsi_destroy(struct msm_dsi *msm_dsi)
static struct msm_dsi *dsi_init(struct platform_device *pdev)
{
- struct msm_dsi *msm_dsi = NULL;
+ struct msm_dsi *msm_dsi;
int ret;
- if (!pdev) {
- dev_err(&pdev->dev, "no dsi device\n");
- ret = -ENXIO;
- goto fail;
- }
+ if (!pdev)
+ return ERR_PTR(-ENXIO);
msm_dsi = devm_kzalloc(&pdev->dev, sizeof(*msm_dsi), GFP_KERNEL);
- if (!msm_dsi) {
- ret = -ENOMEM;
- goto fail;
- }
+ if (!msm_dsi)
+ return ERR_PTR(-ENOMEM);
DBG("dsi probed=%p", msm_dsi);
msm_dsi->pdev = pdev;
@@ -61,19 +91,22 @@ static struct msm_dsi *dsi_init(struct platform_device *pdev)
/* Init dsi host */
ret = msm_dsi_host_init(msm_dsi);
if (ret)
- goto fail;
+ goto destroy_dsi;
+
+ /* GET dsi PHY */
+ ret = dsi_get_phy(msm_dsi);
+ if (ret)
+ goto destroy_dsi;
/* Register to dsi manager */
ret = msm_dsi_manager_register(msm_dsi);
if (ret)
- goto fail;
+ goto destroy_dsi;
return msm_dsi;
-fail:
- if (msm_dsi)
- dsi_destroy(msm_dsi);
-
+destroy_dsi:
+ dsi_destroy(msm_dsi);
return ERR_PTR(ret);
}
@@ -142,12 +175,14 @@ static struct platform_driver dsi_driver = {
void __init msm_dsi_register(void)
{
DBG("");
+ msm_dsi_phy_driver_register();
platform_driver_register(&dsi_driver);
}
void __exit msm_dsi_unregister(void)
{
DBG("");
+ msm_dsi_phy_driver_unregister();
platform_driver_unregister(&dsi_driver);
}
@@ -155,6 +190,7 @@ int msm_dsi_modeset_init(struct msm_dsi *msm_dsi, struct drm_device *dev,
struct drm_encoder *encoders[MSM_DSI_ENCODER_NUM])
{
struct msm_drm_private *priv = dev->dev_private;
+ struct drm_bridge *ext_bridge;
int ret, i;
if (WARN_ON(!encoders[MSM_DSI_VIDEO_ENCODER_ID] ||
@@ -182,10 +218,25 @@ int msm_dsi_modeset_init(struct msm_dsi *msm_dsi, struct drm_device *dev,
msm_dsi->encoders[i] = encoders[i];
}
- msm_dsi->connector = msm_dsi_manager_connector_init(msm_dsi->id);
+ /*
+ * check if the dsi encoder output is connected to a panel or an
+ * external bridge. We create a connector only if we're connected to a
+ * drm_panel device. When we're connected to an external bridge, we
+ * assume that the drm_bridge driver will create the connector itself.
+ */
+ ext_bridge = msm_dsi_host_get_bridge(msm_dsi->host);
+
+ if (ext_bridge)
+ msm_dsi->connector =
+ msm_dsi_manager_ext_bridge_init(msm_dsi->id);
+ else
+ msm_dsi->connector =
+ msm_dsi_manager_connector_init(msm_dsi->id);
+
if (IS_ERR(msm_dsi->connector)) {
ret = PTR_ERR(msm_dsi->connector);
- dev_err(dev->dev, "failed to create dsi connector: %d\n", ret);
+ dev_err(dev->dev,
+ "failed to create dsi connector: %d\n", ret);
msm_dsi->connector = NULL;
goto fail;
}
@@ -201,10 +252,12 @@ fail:
msm_dsi_manager_bridge_destroy(msm_dsi->bridge);
msm_dsi->bridge = NULL;
}
- if (msm_dsi->connector) {
+
+ /* don't destroy connector if we didn't make it */
+ if (msm_dsi->connector && !msm_dsi->external_bridge)
msm_dsi->connector->funcs->destroy(msm_dsi->connector);
- msm_dsi->connector = NULL;
- }
+
+ msm_dsi->connector = NULL;
}
return ret;