diff options
| -rw-r--r-- | drivers/gpu/drm/vc4/vc4_dsi.c | 38 |
1 files changed, 37 insertions, 1 deletions
diff --git a/drivers/gpu/drm/vc4/vc4_dsi.c b/drivers/gpu/drm/vc4/vc4_dsi.c index 13266ff334d0..4f5bdb9a328b 100644 --- a/drivers/gpu/drm/vc4/vc4_dsi.c +++ b/drivers/gpu/drm/vc4/vc4_dsi.c @@ -552,6 +552,8 @@ struct vc4_dsi { struct vc4_encoder encoder; struct mipi_dsi_host dsi_host; + struct kref kref; + struct platform_device *pdev; struct drm_bridge *bridge; @@ -1556,6 +1558,31 @@ static void vc4_dsi_dma_chan_release(void *ptr) dsi->reg_dma_chan = NULL; } +static void vc4_dsi_release(struct kref *kref) +{ + struct vc4_dsi *dsi = + container_of(kref, struct vc4_dsi, kref); + + kfree(dsi); +} + +static void vc4_dsi_get(struct vc4_dsi *dsi) +{ + kref_get(&dsi->kref); +} + +static void vc4_dsi_put(struct vc4_dsi *dsi) +{ + kref_put(&dsi->kref, &vc4_dsi_release); +} + +static void vc4_dsi_release_action(struct drm_device *drm, void *ptr) +{ + struct vc4_dsi *dsi = ptr; + + vc4_dsi_put(dsi); +} + static int vc4_dsi_bind(struct device *dev, struct device *master, void *data) { struct platform_device *pdev = to_platform_device(dev); @@ -1564,6 +1591,12 @@ static int vc4_dsi_bind(struct device *dev, struct device *master, void *data) struct drm_encoder *encoder = &dsi->encoder.base; int ret; + vc4_dsi_get(dsi); + + ret = drmm_add_action_or_reset(drm, vc4_dsi_release_action, dsi); + if (ret) + return ret; + dsi->variant = of_device_get_match_data(dev); INIT_LIST_HEAD(&dsi->bridge_chain); @@ -1738,11 +1771,12 @@ static int vc4_dsi_dev_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; struct vc4_dsi *dsi; - dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL); + dsi = kzalloc(sizeof(*dsi), GFP_KERNEL); if (!dsi) return -ENOMEM; dev_set_drvdata(dev, dsi); + kref_init(&dsi->kref); dsi->pdev = pdev; dsi->dsi_host.ops = &vc4_dsi_host_ops; dsi->dsi_host.dev = dev; @@ -1757,6 +1791,8 @@ static int vc4_dsi_dev_remove(struct platform_device *pdev) struct vc4_dsi *dsi = dev_get_drvdata(dev); mipi_dsi_host_unregister(&dsi->dsi_host); + vc4_dsi_put(dsi); + return 0; } |