drm/tegra: Count number of display controllers at runtime

In order to be able to attach planes to all possible display controllers
the exact number of CRTCs must be known. Keep track of the number of the
display controllers that register during initialization.

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

diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c
index bc8756d06b3eb9a519b7af686d162502d59749c3..aacbe5e202d2eb576a418ee59edd7608e4a38d1f 100644 (file)
--- a/drivers/gpu/drm/tegra/dc.c
+++ b/drivers/gpu/drm/tegra/dc.c
@@ -2080,6 +2080,16 @@ static bool tegra_dc_has_window_groups(struct tegra_dc *dc)
        return false;
 }
 
+static int tegra_dc_early_init(struct host1x_client *client)
+{
+       struct drm_device *drm = dev_get_drvdata(client->host);
+       struct tegra_drm *tegra = drm->dev_private;
+
+       tegra->num_crtcs++;
+
+       return 0;
+}
+
 static int tegra_dc_init(struct host1x_client *client)
 {
        struct drm_device *drm = dev_get_drvdata(client->host);
@@ -2228,6 +2238,16 @@ static int tegra_dc_exit(struct host1x_client *client)
        return 0;
 }
 
+static int tegra_dc_late_exit(struct host1x_client *client)
+{
+       struct drm_device *drm = dev_get_drvdata(client->host);
+       struct tegra_drm *tegra = drm->dev_private;
+
+       tegra->num_crtcs--;
+
+       return 0;
+}
+
 static int tegra_dc_runtime_suspend(struct host1x_client *client)
 {
        struct tegra_dc *dc = host1x_client_to_dc(client);
@@ -2292,8 +2312,10 @@ put_rpm:
 }
 
 static const struct host1x_client_ops dc_client_ops = {
+       .early_init = tegra_dc_early_init,
        .init = tegra_dc_init,
        .exit = tegra_dc_exit,
+       .late_exit = tegra_dc_late_exit,
        .suspend = tegra_dc_runtime_suspend,
        .resume = tegra_dc_runtime_resume,
 };

diff --git a/drivers/gpu/drm/tegra/drm.h b/drivers/gpu/drm/tegra/drm.h
index 1b23bb0e29e3d9a41c3a61b7ff7e827830f99c7f..eef933303a3c552699e4dac89c7152f6f51a568f 100644 (file)
--- a/drivers/gpu/drm/tegra/drm.h
+++ b/drivers/gpu/drm/tegra/drm.h
@@ -56,6 +56,7 @@ struct tegra_drm {
 
        unsigned int hmask, vmask;
        unsigned int pitch_align;
+       unsigned int num_crtcs;
 
        struct tegra_display_hub *hub;
 };

diff --git a/drivers/gpu/drm/tegra/hub.c b/drivers/gpu/drm/tegra/hub.c
index 617240032c372cfede644967e5e5b53863b874e8..500c9d37e654336cbc5798a7d233db2d8edaac24 100644 (file)
--- a/drivers/gpu/drm/tegra/hub.c
+++ b/drivers/gpu/drm/tegra/hub.c
@@ -562,9 +562,8 @@ struct drm_plane *tegra_shared_plane_create(struct drm_device *drm,
        enum drm_plane_type type = DRM_PLANE_TYPE_OVERLAY;
        struct tegra_drm *tegra = drm->dev_private;
        struct tegra_display_hub *hub = tegra->hub;
-       /* planes can be assigned to arbitrary CRTCs */
-       unsigned int possible_crtcs = 0x7;
        struct tegra_shared_plane *plane;
+       unsigned int possible_crtcs;
        unsigned int num_formats;
        const u64 *modifiers;
        struct drm_plane *p;
@@ -583,6 +582,9 @@ struct drm_plane *tegra_shared_plane_create(struct drm_device *drm,
 
        p = &plane->base.base;
 
+       /* planes can be assigned to arbitrary CRTCs */
+       possible_crtcs = BIT(tegra->num_crtcs) - 1;
+
        num_formats = ARRAY_SIZE(tegra_shared_plane_formats);
        formats = tegra_shared_plane_formats;
        modifiers = tegra_shared_plane_modifiers;