gpu: host1x: Remove second host1x driver
Remove second host1x driver, and bind tegra-drm to the new host1x
driver. The logic to parse device tree and track clients is moved
to drm.c.
Signed-off-by: Arto Merilainen <amerilainen@nvidia.com>
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-by: Thierry Reding <thierry.reding@avionic-design.de>
Tested-by: Thierry Reding <thierry.reding@avionic-design.de>
Tested-by: Erik Faye-Lund <kusmabite@gmail.com>
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
diff --git a/drivers/gpu/host1x/drm/drm.c b/drivers/gpu/host1x/drm/drm.c
index 6c59bcd..901f0b4 100644
--- a/drivers/gpu/host1x/drm/drm.c
+++ b/drivers/gpu/host1x/drm/drm.c
@@ -14,6 +14,7 @@
#include <linux/dma-mapping.h>
#include <asm/dma-iommu.h>
+#include "host1x_client.h"
#include "drm.h"
#define DRIVER_NAME "tegra"
@@ -23,13 +24,222 @@
#define DRIVER_MINOR 0
#define DRIVER_PATCHLEVEL 0
-static int tegra_drm_load(struct drm_device *drm, unsigned long flags)
+struct host1x_drm_client {
+ struct host1x_client *client;
+ struct device_node *np;
+ struct list_head list;
+};
+
+static int host1x_add_drm_client(struct host1x_drm *host1x,
+ struct device_node *np)
{
- struct device *dev = drm->dev;
+ struct host1x_drm_client *client;
+
+ client = kzalloc(sizeof(*client), GFP_KERNEL);
+ if (!client)
+ return -ENOMEM;
+
+ INIT_LIST_HEAD(&client->list);
+ client->np = of_node_get(np);
+
+ list_add_tail(&client->list, &host1x->drm_clients);
+
+ return 0;
+}
+
+static int host1x_activate_drm_client(struct host1x_drm *host1x,
+ struct host1x_drm_client *drm,
+ struct host1x_client *client)
+{
+ mutex_lock(&host1x->drm_clients_lock);
+ list_del_init(&drm->list);
+ list_add_tail(&drm->list, &host1x->drm_active);
+ drm->client = client;
+ mutex_unlock(&host1x->drm_clients_lock);
+
+ return 0;
+}
+
+static int host1x_remove_drm_client(struct host1x_drm *host1x,
+ struct host1x_drm_client *client)
+{
+ mutex_lock(&host1x->drm_clients_lock);
+ list_del_init(&client->list);
+ mutex_unlock(&host1x->drm_clients_lock);
+
+ of_node_put(client->np);
+ kfree(client);
+
+ return 0;
+}
+
+static int host1x_parse_dt(struct host1x_drm *host1x)
+{
+ static const char * const compat[] = {
+ "nvidia,tegra20-dc",
+ "nvidia,tegra20-hdmi",
+ "nvidia,tegra30-dc",
+ "nvidia,tegra30-hdmi",
+ };
+ unsigned int i;
+ int err;
+
+ for (i = 0; i < ARRAY_SIZE(compat); i++) {
+ struct device_node *np;
+
+ for_each_child_of_node(host1x->dev->of_node, np) {
+ if (of_device_is_compatible(np, compat[i]) &&
+ of_device_is_available(np)) {
+ err = host1x_add_drm_client(host1x, np);
+ if (err < 0)
+ return err;
+ }
+ }
+ }
+
+ return 0;
+}
+
+int host1x_drm_alloc(struct platform_device *pdev)
+{
struct host1x_drm *host1x;
int err;
- host1x = dev_get_drvdata(dev);
+ host1x = devm_kzalloc(&pdev->dev, sizeof(*host1x), GFP_KERNEL);
+ if (!host1x)
+ return -ENOMEM;
+
+ mutex_init(&host1x->drm_clients_lock);
+ INIT_LIST_HEAD(&host1x->drm_clients);
+ INIT_LIST_HEAD(&host1x->drm_active);
+ mutex_init(&host1x->clients_lock);
+ INIT_LIST_HEAD(&host1x->clients);
+ host1x->dev = &pdev->dev;
+
+ err = host1x_parse_dt(host1x);
+ if (err < 0) {
+ dev_err(&pdev->dev, "failed to parse DT: %d\n", err);
+ return err;
+ }
+
+ host1x_set_drm_data(&pdev->dev, host1x);
+
+ return 0;
+}
+
+int host1x_drm_init(struct host1x_drm *host1x, struct drm_device *drm)
+{
+ struct host1x_client *client;
+
+ mutex_lock(&host1x->clients_lock);
+
+ list_for_each_entry(client, &host1x->clients, list) {
+ if (client->ops && client->ops->drm_init) {
+ int err = client->ops->drm_init(client, drm);
+ if (err < 0) {
+ dev_err(host1x->dev,
+ "DRM setup failed for %s: %d\n",
+ dev_name(client->dev), err);
+ return err;
+ }
+ }
+ }
+
+ mutex_unlock(&host1x->clients_lock);
+
+ return 0;
+}
+
+int host1x_drm_exit(struct host1x_drm *host1x)
+{
+ struct platform_device *pdev = to_platform_device(host1x->dev);
+ struct host1x_client *client;
+
+ if (!host1x->drm)
+ return 0;
+
+ mutex_lock(&host1x->clients_lock);
+
+ list_for_each_entry_reverse(client, &host1x->clients, list) {
+ if (client->ops && client->ops->drm_exit) {
+ int err = client->ops->drm_exit(client);
+ if (err < 0) {
+ dev_err(host1x->dev,
+ "DRM cleanup failed for %s: %d\n",
+ dev_name(client->dev), err);
+ return err;
+ }
+ }
+ }
+
+ mutex_unlock(&host1x->clients_lock);
+
+ drm_platform_exit(&tegra_drm_driver, pdev);
+ host1x->drm = NULL;
+
+ return 0;
+}
+
+int host1x_register_client(struct host1x_drm *host1x,
+ struct host1x_client *client)
+{
+ struct host1x_drm_client *drm, *tmp;
+ int err;
+
+ mutex_lock(&host1x->clients_lock);
+ list_add_tail(&client->list, &host1x->clients);
+ mutex_unlock(&host1x->clients_lock);
+
+ list_for_each_entry_safe(drm, tmp, &host1x->drm_clients, list)
+ if (drm->np == client->dev->of_node)
+ host1x_activate_drm_client(host1x, drm, client);
+
+ if (list_empty(&host1x->drm_clients)) {
+ struct platform_device *pdev = to_platform_device(host1x->dev);
+
+ err = drm_platform_init(&tegra_drm_driver, pdev);
+ if (err < 0) {
+ dev_err(host1x->dev, "drm_platform_init(): %d\n", err);
+ return err;
+ }
+ }
+
+ return 0;
+}
+
+int host1x_unregister_client(struct host1x_drm *host1x,
+ struct host1x_client *client)
+{
+ struct host1x_drm_client *drm, *tmp;
+ int err;
+
+ list_for_each_entry_safe(drm, tmp, &host1x->drm_active, list) {
+ if (drm->client == client) {
+ err = host1x_drm_exit(host1x);
+ if (err < 0) {
+ dev_err(host1x->dev, "host1x_drm_exit(): %d\n",
+ err);
+ return err;
+ }
+
+ host1x_remove_drm_client(host1x, drm);
+ break;
+ }
+ }
+
+ mutex_lock(&host1x->clients_lock);
+ list_del_init(&client->list);
+ mutex_unlock(&host1x->clients_lock);
+
+ return 0;
+}
+
+static int tegra_drm_load(struct drm_device *drm, unsigned long flags)
+{
+ struct host1x_drm *host1x;
+ int err;
+
+ host1x = host1x_get_drm_data(drm->dev);
drm->dev_private = host1x;
host1x->drm = drm;