diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/inc/link.h')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/inc/link.h | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/inc/link.h b/drivers/gpu/drm/amd/display/dc/inc/link.h index 51ddf7a34d98..8774d3a39f05 100644 --- a/drivers/gpu/drm/amd/display/dc/inc/link.h +++ b/drivers/gpu/drm/amd/display/dc/inc/link.h @@ -44,4 +44,41 @@ struct gpio *link_get_hpd_gpio(struct dc_bios *dcb, struct graphics_object_id link_id, struct gpio_service *gpio_service); +struct ddc_service_init_data { + struct graphics_object_id id; + struct dc_context *ctx; + struct dc_link *link; + bool is_dpia_link; +}; + +struct ddc_service *link_create_ddc_service( + struct ddc_service_init_data *ddc_init_data); + +void link_destroy_ddc_service(struct ddc_service **ddc); + +bool link_is_in_aux_transaction_mode(struct ddc_service *ddc); + +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); + +uint32_t link_get_aux_defer_delay(struct ddc_service *ddc); + + #endif /* __DC_LINK_HPD_H__ */ |