diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/link/protocols/link_ddc.h')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/link/protocols/link_ddc.h | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_ddc.h b/drivers/gpu/drm/amd/display/dc/link/protocols/link_ddc.h index f002fa01508e..860ef15d7f1b 100644 --- a/drivers/gpu/drm/amd/display/dc/link/protocols/link_ddc.h +++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_ddc.h @@ -37,13 +37,41 @@ #define EDID_SEGMENT_SIZE 256 +struct ddc_service *link_create_ddc_service( + struct ddc_service_init_data *ddc_init_data); + +void link_destroy_ddc_service(struct ddc_service **ddc); + void set_ddc_transaction_type( struct ddc_service *ddc, enum ddc_transaction_type type); +uint32_t link_get_aux_defer_delay(struct ddc_service *ddc); + +bool link_is_in_aux_transaction_mode(struct ddc_service *ddc); + bool try_to_configure_aux_timeout(struct ddc_service *ddc, uint32_t timeout); +bool link_query_ddc_data( + struct ddc_service *ddc, + uint32_t address, + uint8_t *write_buf, + uint32_t write_size, + uint8_t *read_buf, + uint32_t read_size); + +/* Attempt to submit an aux payload, retrying on timeouts, defers, and busy + * states as outlined in the DP spec. Returns true if the request was + * successful. + * + * NOTE: The function requires explicit mutex on DM side in order to prevent + * potential race condition. DC components should call the dpcd read/write + * function in dm_helpers in order to access dpcd safely + */ +bool link_aux_transfer_with_retries_no_mutex(struct ddc_service *ddc, + struct aux_payload *payload); + void write_scdc_data( struct ddc_service *ddc_service, uint32_t pix_clk, |