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drm/amd/display/dm: add support for OEM i2c bus

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Expose the OEM i2c bus on boards that support it.
This bus is used for OEM specific features like RGB, etc.

Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher
2024-12-17 09:55:49 -05:00
parent b217105acb
commit 3d5470c973
2 changed files with 42 additions and 0 deletions
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35
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
View File

@@ -179,6 +179,8 @@ static int amdgpu_dm_init(struct amdgpu_device *adev);
static void amdgpu_dm_fini(struct amdgpu_device *adev);
static bool is_freesync_video_mode(const struct drm_display_mode *mode, struct amdgpu_dm_connector *aconnector);
static void reset_freesync_config_for_crtc(struct dm_crtc_state *new_crtc_state);
static struct amdgpu_i2c_adapter *
create_i2c(struct ddc_service *ddc_service, bool oem);
static enum drm_mode_subconnector get_subconnector_type(struct dc_link *link)
{
@@ -2893,6 +2895,33 @@ static int amdgpu_dm_smu_write_watermarks_table(struct amdgpu_device *adev)
return 0;
}
static int dm_oem_i2c_hw_init(struct amdgpu_device *adev)
{
struct amdgpu_display_manager *dm = &adev->dm;
struct amdgpu_i2c_adapter *oem_i2c;
struct ddc_service *oem_ddc_service;
int r;
oem_ddc_service = dc_get_oem_i2c_device(adev->dm.dc);
if (oem_ddc_service) {
oem_i2c = create_i2c(oem_ddc_service, true);
if (!oem_i2c) {
dev_info(adev->dev, "Failed to create oem i2c adapter data\n");
return -ENOMEM;
}
r = i2c_add_adapter(&oem_i2c->base);
if (r) {
dev_info(adev->dev, "Failed to register oem i2c\n");
kfree(oem_i2c);
return r;
}
dm->oem_i2c = oem_i2c;
}
return 0;
}
/**
* dm_hw_init() - Initialize DC device
* @ip_block: Pointer to the amdgpu_ip_block for this hw instance.
@@ -2924,6 +2953,10 @@ static int dm_hw_init(struct amdgpu_ip_block *ip_block)
return r;
amdgpu_dm_hpd_init(adev);
r = dm_oem_i2c_hw_init(adev);
if (r)
dev_info(adev->dev, "Failed to add OEM i2c bus\n");
return 0;
}
@@ -2939,6 +2972,8 @@ static int dm_hw_fini(struct amdgpu_ip_block *ip_block)
{
struct amdgpu_device *adev = ip_block->adev;
kfree(adev->dm.oem_i2c);
amdgpu_dm_hpd_fini(adev);
amdgpu_dm_irq_fini(adev);

7
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
View File

@@ -606,6 +606,13 @@ struct amdgpu_display_manager {
* Bounding box data read from dmub during early initialization for DCN4+
*/
struct dml2_soc_bb *bb_from_dmub;
/**
* @oem_i2c:
*
* OEM i2c bus
*/
struct amdgpu_i2c_adapter *oem_i2c;
};
enum dsc_clock_force_state {