drm/tegra: Introduce tegra_drm_client structure

This structure derives from host1x_client. DRM-specific fields are moved
from host1x_client to this structure, so that host1x_client can remain
agnostic of DRM.

Signed-off-by: Thierry Reding <treding@nvidia.com>

5 files changed, 94 insertions, 83 deletions

diff --git a/drivers/gpu/host1x/drm/dc.c b/drivers/gpu/host1x/drm/dc.c
index e11aec779a15..5106df08f046 100644
--- a/drivers/gpu/host1x/drm/dc.c
+++ b/drivers/gpu/host1x/drm/dc.c
@@ -1038,30 +1038,30 @@ static int tegra_dc_debugfs_exit(struct tegra_dc *dc)
         return 0;
 }
 
-static int tegra_dc_drm_init(struct host1x_client *client,
-                             struct drm_device *drm)
+static int tegra_dc_init(struct host1x_client *client)
 {
-        struct tegra_dc *dc = host1x_client_to_dc(client);
+        struct tegra_drm_client *drm = to_tegra_drm_client(client);
+        struct tegra_dc *dc = tegra_drm_client_to_dc(drm);
         int err;
 
-        dc->pipe = drm->mode_config.num_crtc;
+        dc->pipe = drm->drm->mode_config.num_crtc;
 
-        drm_crtc_init(drm, &dc->base, &tegra_crtc_funcs);
+        drm_crtc_init(drm->drm, &dc->base, &tegra_crtc_funcs);
         drm_mode_crtc_set_gamma_size(&dc->base, 256);
         drm_crtc_helper_add(&dc->base, &tegra_crtc_helper_funcs);
 
-        err = tegra_dc_rgb_init(drm, dc);
+        err = tegra_dc_rgb_init(drm->drm, dc);
         if (err < 0 && err != -ENODEV) {
                 dev_err(dc->dev, "failed to initialize RGB output: %d\n", err);
                 return err;
         }
 
-        err = tegra_dc_add_planes(drm, dc);
+        err = tegra_dc_add_planes(drm->drm, dc);
         if (err < 0)
                 return err;
 
         if (IS_ENABLED(CONFIG_DEBUG_FS)) {
-                err = tegra_dc_debugfs_init(dc, drm->primary);
+                err = tegra_dc_debugfs_init(dc, drm->drm->primary);
                 if (err < 0)
                         dev_err(dc->dev, "debugfs setup failed: %d\n", err);
         }
@@ -1077,9 +1077,10 @@ static int tegra_dc_drm_init(struct host1x_client *client,
         return 0;
 }
 
-static int tegra_dc_drm_exit(struct host1x_client *client)
+static int tegra_dc_exit(struct host1x_client *client)
 {
-        struct tegra_dc *dc = host1x_client_to_dc(client);
+        struct tegra_drm_client *drm = to_tegra_drm_client(client);
+        struct tegra_dc *dc = tegra_drm_client_to_dc(drm);
         int err;
 
         devm_free_irq(dc->dev, dc->irq, dc);
@@ -1100,8 +1101,8 @@ static int tegra_dc_drm_exit(struct host1x_client *client)
 }
 
 static const struct host1x_client_ops dc_client_ops = {
-        .drm_init = tegra_dc_drm_init,
-        .drm_exit = tegra_dc_drm_exit,
+        .init = tegra_dc_init,
+        .exit = tegra_dc_exit,
 };
 
 static int tegra_dc_probe(struct platform_device *pdev)
@@ -1140,9 +1141,9 @@ static int tegra_dc_probe(struct platform_device *pdev)
                 return -ENXIO;
         }
 
-        INIT_LIST_HEAD(&dc->client.list);
-        dc->client.ops = &dc_client_ops;
-        dc->client.dev = &pdev->dev;
+        INIT_LIST_HEAD(&dc->client.base.list);
+        dc->client.base.ops = &dc_client_ops;
+        dc->client.base.dev = &pdev->dev;
 
         err = tegra_dc_rgb_probe(dc);
         if (err < 0 && err != -ENODEV) {
@@ -1150,7 +1151,7 @@ static int tegra_dc_probe(struct platform_device *pdev)
                 return err;
         }
 
-        err = host1x_register_client(tegra, &dc->client);
+        err = host1x_register_client(tegra, &dc->client.base);
         if (err < 0) {
                 dev_err(&pdev->dev, "failed to register host1x client: %d\n",
                         err);
@@ -1168,7 +1169,7 @@ static int tegra_dc_remove(struct platform_device *pdev)
         struct tegra_dc *dc = platform_get_drvdata(pdev);
         int err;
 
-        err = host1x_unregister_client(tegra, &dc->client);
+        err = host1x_unregister_client(tegra, &dc->client.base);
         if (err < 0) {
                 dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
                         err);
diff --git a/drivers/gpu/host1x/drm/drm.c b/drivers/gpu/host1x/drm/drm.c
index 4e503613536b..33d966145293 100644
--- a/drivers/gpu/host1x/drm/drm.c
+++ b/drivers/gpu/host1x/drm/drm.c
@@ -131,12 +131,18 @@ int tegra_drm_alloc(struct platform_device *pdev)
 int tegra_drm_init(struct tegra_drm *tegra, struct drm_device *drm)
 {
         struct host1x_client *client;
+        int err;
 
         mutex_lock(&tegra->clients_lock);
 
         list_for_each_entry(client, &tegra->clients, list) {
-                if (client->ops && client->ops->drm_init) {
-                        int err = client->ops->drm_init(client, drm);
+                struct tegra_drm_client *tdc = to_tegra_drm_client(client);
+
+                /* associate client with DRM device */
+                tdc->drm = drm;
+
+                if (client->ops && client->ops->init) {
+                        err = client->ops->init(client);
                         if (err < 0) {
                                 dev_err(tegra->dev,
                                         "DRM setup failed for %s: %d\n",
@@ -154,8 +160,9 @@ int tegra_drm_init(struct tegra_drm *tegra, struct drm_device *drm)
 
 int tegra_drm_exit(struct tegra_drm *tegra)
 {
-        struct platform_device *pdev = to_platform_device(tegra->dev);
         struct host1x_client *client;
+        struct platform_device *pdev;
+        int err;
 
         if (!tegra->drm)
                 return 0;
@@ -163,8 +170,8 @@ int tegra_drm_exit(struct tegra_drm *tegra)
         mutex_lock(&tegra->clients_lock);
 
         list_for_each_entry_reverse(client, &tegra->clients, list) {
-                if (client->ops && client->ops->drm_exit) {
-                        int err = client->ops->drm_exit(client);
+                if (client->ops && client->ops->exit) {
+                        err = client->ops->exit(client);
                         if (err < 0) {
                                 dev_err(tegra->dev,
                                         "DRM cleanup failed for %s: %d\n",
@@ -177,6 +184,7 @@ int tegra_drm_exit(struct tegra_drm *tegra)
 
         mutex_unlock(&tegra->clients_lock);
 
+        pdev = to_platform_device(tegra->dev);
         drm_platform_exit(&tegra_drm_driver, pdev);
         tegra->drm = NULL;
 
@@ -409,22 +417,22 @@ static int tegra_open_channel(struct drm_device *drm, void *data,
         struct tegra_drm *tegra = drm->dev_private;
         struct drm_tegra_open_channel *args = data;
         struct tegra_drm_context *context;
-        struct host1x_client *client;
+        struct tegra_drm_client *client;
         int err = -ENODEV;
 
         context = kzalloc(sizeof(*context), GFP_KERNEL);
         if (!context)
                 return -ENOMEM;
 
-        list_for_each_entry(client, &tegra->clients, list)
-                if (client->class == args->client) {
+        list_for_each_entry(client, &tegra->clients, base.list)
+                if (client->base.class == args->client) {
                         err = client->ops->open_channel(client, context);
                         if (err)
                                 break;
 
-                        context->client = client;
                         list_add(&context->list, &fpriv->contexts);
                         args->context = (uintptr_t)context;
+                        context->client = client;
                         return 0;
                 }
 
@@ -463,10 +471,10 @@ static int tegra_get_syncpt(struct drm_device *drm, void *data,
         if (!tegra_drm_file_owns_context(fpriv, context))
                 return -ENODEV;
 
-        if (args->index >= context->client->num_syncpts)
+        if (args->index >= context->client->base.num_syncpts)
                 return -EINVAL;
 
-        syncpt = context->client->syncpts[args->index];
+        syncpt = context->client->base.syncpts[args->index];
         args->id = host1x_syncpt_id(syncpt);
 
         return 0;
diff --git a/drivers/gpu/host1x/drm/drm.h b/drivers/gpu/host1x/drm/drm.h
index 78754f6a9153..8c26c6b1f5e1 100644
--- a/drivers/gpu/host1x/drm/drm.h
+++ b/drivers/gpu/host1x/drm/drm.h
@@ -44,18 +44,16 @@ struct tegra_drm {
         struct tegra_fbdev *fbdev;
 };
 
-struct host1x_client;
+struct tegra_drm_client;
 
 struct tegra_drm_context {
-        struct host1x_client *client;
+        struct tegra_drm_client *client;
         struct host1x_channel *channel;
         struct list_head list;
 };
 
-struct host1x_client_ops {
-        int (*drm_init)(struct host1x_client *client, struct drm_device *drm);
-        int (*drm_exit)(struct host1x_client *client);
-        int (*open_channel)(struct host1x_client *client,
+struct tegra_drm_client_ops {
+        int (*open_channel)(struct tegra_drm_client *client,
                             struct tegra_drm_context *context);
         void (*close_channel)(struct tegra_drm_context *context);
         int (*submit)(struct tegra_drm_context *context,
@@ -63,21 +61,19 @@ struct host1x_client_ops {
                       struct drm_file *file);
 };
 
-struct host1x_client {
-        struct tegra_drm *tegra;
-        struct device *dev;
-
-        const struct host1x_client_ops *ops;
-
-        enum host1x_class class;
-        struct host1x_channel *channel;
-
-        struct host1x_syncpt **syncpts;
-        unsigned int num_syncpts;
+struct tegra_drm_client {
+        struct host1x_client base;
+        struct drm_device *drm;
 
-        struct list_head list;
+        const struct tegra_drm_client_ops *ops;
 };
 
+static inline struct tegra_drm_client *
+to_tegra_drm_client(struct host1x_client *client)
+{
+        return container_of(client, struct tegra_drm_client, base);
+}
+
 extern int tegra_drm_init(struct tegra_drm *tegra, struct drm_device *drm);
 extern int tegra_drm_exit(struct tegra_drm *tegra);
 
@@ -89,7 +85,7 @@ extern int host1x_unregister_client(struct tegra_drm *tegra,
 struct tegra_output;
 
 struct tegra_dc {
-        struct host1x_client client;
+        struct tegra_drm_client client;
         struct device *dev;
         spinlock_t lock;
 
@@ -112,7 +108,8 @@ struct tegra_dc {
         struct drm_pending_vblank_event *event;
 };
 
-static inline struct tegra_dc *host1x_client_to_dc(struct host1x_client *client)
+static inline struct tegra_dc *
+tegra_drm_client_to_dc(struct tegra_drm_client *client)
 {
         return container_of(client, struct tegra_dc, client);
 }
diff --git a/drivers/gpu/host1x/drm/gr2d.c b/drivers/gpu/host1x/drm/gr2d.c
index 2691e333e0e2..a7edc794c5ce 100644
--- a/drivers/gpu/host1x/drm/gr2d.c
+++ b/drivers/gpu/host1x/drm/gr2d.c
@@ -27,20 +27,19 @@
 #define GR2D_NUM_REGS 0x4d
 
 struct gr2d {
-        struct host1x_client client;
+        struct tegra_drm_client client;
         struct host1x_channel *channel;
         struct clk *clk;
 
         DECLARE_BITMAP(addr_regs, GR2D_NUM_REGS);
 };
 
-static inline struct gr2d *to_gr2d(struct host1x_client *client)
+static inline struct gr2d *to_gr2d(struct tegra_drm_client *client)
 {
         return container_of(client, struct gr2d, client);
 }
 
-static int gr2d_client_init(struct host1x_client *client,
-                            struct drm_device *drm)
+static int gr2d_client_init(struct host1x_client *client)
 {
         return 0;
 }
@@ -50,7 +49,12 @@ static int gr2d_client_exit(struct host1x_client *client)
         return 0;
 }
 
-static int gr2d_open_channel(struct host1x_client *client,
+static const struct host1x_client_ops gr2d_client_ops = {
+        .init = gr2d_client_init,
+        .exit = gr2d_client_exit,
+};
+
+static int gr2d_open_channel(struct tegra_drm_client *client,
                              struct tegra_drm_context *context)
 {
         struct gr2d *gr2d = to_gr2d(client);
@@ -140,7 +144,7 @@ static int gr2d_submit(struct tegra_drm_context *context,
         job->num_relocs = args->num_relocs;
         job->num_waitchk = args->num_waitchks;
         job->client = (u32)args->context;
-        job->class = context->client->class;
+        job->class = context->client->base.class;
         job->serialize = true;
 
         while (num_cmdbufs) {
@@ -201,7 +205,7 @@ static int gr2d_submit(struct tegra_drm_context *context,
         if (args->timeout && args->timeout < 10000)
                 job->timeout = args->timeout;
 
-        err = host1x_job_pin(job, context->client->dev);
+        err = host1x_job_pin(job, context->client->base.dev);
         if (err)
                 goto fail;
 
@@ -221,9 +225,7 @@ fail:
         return err;
 }
 
-static struct host1x_client_ops gr2d_client_ops = {
-        .drm_init = gr2d_client_init,
-        .drm_exit = gr2d_client_exit,
+static const struct tegra_drm_client_ops gr2d_ops = {
         .open_channel = gr2d_open_channel,
         .close_channel = gr2d_close_channel,
         .submit = gr2d_submit,
@@ -279,13 +281,15 @@ static int gr2d_probe(struct platform_device *pdev)
                 return -ENOMEM;
         }
 
-        gr2d->client.ops = &gr2d_client_ops;
-        gr2d->client.dev = dev;
-        gr2d->client.class = HOST1X_CLASS_GR2D;
-        gr2d->client.syncpts = syncpts;
-        gr2d->client.num_syncpts = 1;
+        INIT_LIST_HEAD(&gr2d->client.base.list);
+        gr2d->client.base.ops = &gr2d_client_ops;
+        gr2d->client.base.dev = dev;
+        gr2d->client.base.class = HOST1X_CLASS_GR2D;
+        gr2d->client.base.syncpts = syncpts;
+        gr2d->client.base.num_syncpts = 1;
+        gr2d->client.ops = &gr2d_ops;
 
-        err = host1x_register_client(tegra, &gr2d->client);
+        err = host1x_register_client(tegra, &gr2d->client.base);
         if (err < 0) {
                 dev_err(dev, "failed to register host1x client: %d\n", err);
                 return err;
@@ -307,15 +311,15 @@ static int gr2d_remove(struct platform_device *pdev)
         unsigned int i;
         int err;
 
-        err = host1x_unregister_client(tegra, &gr2d->client);
+        err = host1x_unregister_client(tegra, &gr2d->client.base);
         if (err < 0) {
                 dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
                         err);
                 return err;
         }
 
-        for (i = 0; i < gr2d->client.num_syncpts; i++)
-                host1x_syncpt_free(gr2d->client.syncpts[i]);
+        for (i = 0; i < gr2d->client.base.num_syncpts; i++)
+                host1x_syncpt_free(gr2d->client.base.syncpts[i]);
 
         host1x_channel_free(gr2d->channel);
         clk_disable_unprepare(gr2d->clk);
diff --git a/drivers/gpu/host1x/drm/hdmi.c b/drivers/gpu/host1x/drm/hdmi.c
index 5d8c41cf4f58..30ac9e872b0d 100644
--- a/drivers/gpu/host1x/drm/hdmi.c
+++ b/drivers/gpu/host1x/drm/hdmi.c
@@ -19,7 +19,7 @@
 #include "host1x_client.h"
 
 struct tegra_hdmi {
-        struct host1x_client client;
+        struct tegra_drm_client client;
         struct tegra_output output;
         struct device *dev;
 
@@ -43,7 +43,7 @@ struct tegra_hdmi {
 };
 
 static inline struct tegra_hdmi *
-host1x_client_to_hdmi(struct host1x_client *client)
+tegra_drm_client_to_hdmi(struct tegra_drm_client *client)
 {
         return container_of(client, struct tegra_hdmi, client);
 }
@@ -1116,24 +1116,24 @@ static int tegra_hdmi_debugfs_exit(struct tegra_hdmi *hdmi)
         return 0;
 }
 
-static int tegra_hdmi_drm_init(struct host1x_client *client,
-                               struct drm_device *drm)
+static int tegra_hdmi_init(struct host1x_client *client)
 {
-        struct tegra_hdmi *hdmi = host1x_client_to_hdmi(client);
+        struct tegra_drm_client *drm = to_tegra_drm_client(client);
+        struct tegra_hdmi *hdmi = tegra_drm_client_to_hdmi(drm);
         int err;
 
         hdmi->output.type = TEGRA_OUTPUT_HDMI;
         hdmi->output.dev = client->dev;
         hdmi->output.ops = &hdmi_ops;
 
-        err = tegra_output_init(drm, &hdmi->output);
+        err = tegra_output_init(drm->drm, &hdmi->output);
         if (err < 0) {
                 dev_err(client->dev, "output setup failed: %d\n", err);
                 return err;
         }
 
         if (IS_ENABLED(CONFIG_DEBUG_FS)) {
-                err = tegra_hdmi_debugfs_init(hdmi, drm->primary);
+                err = tegra_hdmi_debugfs_init(hdmi, drm->drm->primary);
                 if (err < 0)
                         dev_err(client->dev, "debugfs setup failed: %d\n", err);
         }
@@ -1141,9 +1141,10 @@ static int tegra_hdmi_drm_init(struct host1x_client *client,
         return 0;
 }
 
-static int tegra_hdmi_drm_exit(struct host1x_client *client)
+static int tegra_hdmi_exit(struct host1x_client *client)
 {
-        struct tegra_hdmi *hdmi = host1x_client_to_hdmi(client);
+        struct tegra_drm_client *drm = to_tegra_drm_client(client);
+        struct tegra_hdmi *hdmi = tegra_drm_client_to_hdmi(drm);
         int err;
 
         if (IS_ENABLED(CONFIG_DEBUG_FS)) {
@@ -1169,8 +1170,8 @@ static int tegra_hdmi_drm_exit(struct host1x_client *client)
 }
 
 static const struct host1x_client_ops hdmi_client_ops = {
-        .drm_init = tegra_hdmi_drm_init,
-        .drm_exit = tegra_hdmi_drm_exit,
+        .init = tegra_hdmi_init,
+        .exit = tegra_hdmi_exit,
 };
 
 static int tegra_hdmi_probe(struct platform_device *pdev)
@@ -1246,11 +1247,11 @@ static int tegra_hdmi_probe(struct platform_device *pdev)
 
         hdmi->irq = err;
 
-        hdmi->client.ops = &hdmi_client_ops;
-        INIT_LIST_HEAD(&hdmi->client.list);
-        hdmi->client.dev = &pdev->dev;
+        INIT_LIST_HEAD(&hdmi->client.base.list);
+        hdmi->client.base.ops = &hdmi_client_ops;
+        hdmi->client.base.dev = &pdev->dev;
 
-        err = host1x_register_client(tegra, &hdmi->client);
+        err = host1x_register_client(tegra, &hdmi->client.base);
         if (err < 0) {
                 dev_err(&pdev->dev, "failed to register host1x client: %d\n",
                         err);
@@ -1268,7 +1269,7 @@ static int tegra_hdmi_remove(struct platform_device *pdev)
         struct tegra_hdmi *hdmi = platform_get_drvdata(pdev);
         int err;
 
-        err = host1x_unregister_client(tegra, &hdmi->client);
+        err = host1x_unregister_client(tegra, &hdmi->client.base);
         if (err < 0) {
                 dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
                         err);