summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/radeon/radeon_i2c.c
diff options
context:
space:
mode:
authorAlex Deucher <alexdeucher@gmail.com>2010-08-06 05:21:16 +0400
committerDave Airlie <airlied@redhat.com>2010-08-10 04:46:48 +0400
commitf376b94fbc0a313a606748206340cbef6c2adf6b (patch)
tree79687e8c214bf70251c242f8042bc46d6fc61020 /drivers/gpu/drm/radeon/radeon_i2c.c
parent1729dd33d20bddf1b3f371f3090f0cfd6be50b7a (diff)
downloadlinux-f376b94fbc0a313a606748206340cbef6c2adf6b.tar.xz
drm/radeon/kms: unify i2c handling
Previously we added i2c buses as needed when enumerating connectors power management, etc. This only exposed the actual buses used and could have lead to the same buse getting created more than once if one buses was used for more than one purpose. This patch sets up all i2c buses on the card in one place and users of the buses just point back to the one instance. Signed-off-by: Alex Deucher <alexdeucher@gmail.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_i2c.c')
-rw-r--r--drivers/gpu/drm/radeon/radeon_i2c.c53
1 files changed, 53 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_i2c.c b/drivers/gpu/drm/radeon/radeon_i2c.c
index 5def6f5dff38..e71f2eb02ee2 100644
--- a/drivers/gpu/drm/radeon/radeon_i2c.c
+++ b/drivers/gpu/drm/radeon/radeon_i2c.c
@@ -960,6 +960,59 @@ void radeon_i2c_destroy(struct radeon_i2c_chan *i2c)
kfree(i2c);
}
+/* Add the default buses */
+void radeon_i2c_init(struct radeon_device *rdev)
+{
+ if (rdev->is_atom_bios)
+ radeon_atombios_i2c_init(rdev);
+ else
+ radeon_combios_i2c_init(rdev);
+}
+
+/* remove all the buses */
+void radeon_i2c_fini(struct radeon_device *rdev)
+{
+ int i;
+
+ for (i = 0; i < RADEON_MAX_I2C_BUS; i++) {
+ if (rdev->i2c_bus[i]) {
+ radeon_i2c_destroy(rdev->i2c_bus[i]);
+ rdev->i2c_bus[i] = NULL;
+ }
+ }
+}
+
+/* Add additional buses */
+void radeon_i2c_add(struct radeon_device *rdev,
+ struct radeon_i2c_bus_rec *rec,
+ const char *name)
+{
+ struct drm_device *dev = rdev->ddev;
+ int i;
+
+ for (i = 0; i < RADEON_MAX_I2C_BUS; i++) {
+ if (!rdev->i2c_bus[i]) {
+ rdev->i2c_bus[i] = radeon_i2c_create(dev, rec, name);
+ return;
+ }
+ }
+}
+
+/* looks up bus based on id */
+struct radeon_i2c_chan *radeon_i2c_lookup(struct radeon_device *rdev,
+ struct radeon_i2c_bus_rec *i2c_bus)
+{
+ int i;
+
+ for (i = 0; i < RADEON_MAX_I2C_BUS; i++) {
+ if (rdev->i2c_bus[i] &&
+ (rdev->i2c_bus[i]->rec.i2c_id == i2c_bus->i2c_id)) {
+ return rdev->i2c_bus[i];
+ }
+ }
+ return NULL;
+}
+
struct drm_encoder *radeon_best_encoder(struct drm_connector *connector)
{
return NULL;