From: Wyatt Wood Date: Fri, 19 Feb 2021 17:21:47 +0000 (-0500) Subject: drm/amd/display: Return invalid state if GPINT times out X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=8039bc7130ef4206a58e4dc288621bc97eba08eb;p=linux.git drm/amd/display: Return invalid state if GPINT times out [Why] GPINT timeout is causing PSR_STATE_0 to be returned when it shouldn't. We must guarantee that PSR is fully disabled before doing hw programming on driver-side. [How] Return invalid state if GPINT command times out. Let existing retry logic send the GPINT until successful. Tested-by: Daniel Wheeler Signed-off-by: Wyatt Wood Reviewed-by: Anthony Koo Acked-by: Rodrigo Siqueira Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c b/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c index 62c019fd326e1..03741e170b61f 100644 --- a/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c +++ b/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c @@ -81,13 +81,18 @@ static void dmub_psr_get_state(struct dmub_psr *dmub, enum dc_psr_state *state) { struct dmub_srv *srv = dmub->ctx->dmub_srv->dmub; uint32_t raw_state; + enum dmub_status status = DMUB_STATUS_INVALID; // Send gpint command and wait for ack - dmub_srv_send_gpint_command(srv, DMUB_GPINT__GET_PSR_STATE, 0, 30); - - dmub_srv_get_gpint_response(srv, &raw_state); - - *state = convert_psr_state(raw_state); + status = dmub_srv_send_gpint_command(srv, DMUB_GPINT__GET_PSR_STATE, 0, 30); + + if (status == DMUB_STATUS_OK) { + // GPINT was executed, get response + dmub_srv_get_gpint_response(srv, &raw_state); + *state = convert_psr_state(raw_state); + } else + // Return invalid state when GPINT times out + *state = 0xFF; } /*