diff options
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/core/dc_link.c | 18 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dc_link.h | 1 |
2 files changed, 19 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c index 9d8dc2c1ca65..bd58dbae7d3e 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c @@ -890,6 +890,24 @@ bool dc_link_detect(struct dc_link *link, enum dc_detect_reason reason) return true; } +bool dc_link_get_hpd_state(struct dc_link *dc_link) +{ + struct gpio *hpd_pin; + uint32_t state; + + hpd_pin = get_hpd_gpio(dc_link->ctx->dc_bios, + dc_link->link_id, dc_link->ctx->gpio_service); + if (hpd_pin == NULL) + ASSERT(false); + + dal_gpio_open(hpd_pin, GPIO_MODE_INTERRUPT); + dal_gpio_get_value(hpd_pin, &state); + dal_gpio_close(hpd_pin); + dal_gpio_destroy_irq(&hpd_pin); + + return state; +} + static enum hpd_source_id get_hpd_line( struct dc_link *link) { diff --git a/drivers/gpu/drm/amd/display/dc/dc_link.h b/drivers/gpu/drm/amd/display/dc/dc_link.h index d43cefbc43d3..438fb35d87b8 100644 --- a/drivers/gpu/drm/amd/display/dc/dc_link.h +++ b/drivers/gpu/drm/amd/display/dc/dc_link.h @@ -167,6 +167,7 @@ enum dc_detect_reason { }; bool dc_link_detect(struct dc_link *dc_link, enum dc_detect_reason reason); +bool dc_link_get_hpd_state(struct dc_link *dc_link); /* Notify DC about DP RX Interrupt (aka Short Pulse Interrupt). * Return: |