From: Nicholas Kazlauskas Date: Mon, 5 Feb 2024 22:13:40 +0000 (-0500) Subject: drm/amd/display: Fix S4 hang polling on HW power up done for VBIOS DMCUB X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=c4a060372590848d886c24b8215139cab122c0ed;p=linux.git drm/amd/display: Fix S4 hang polling on HW power up done for VBIOS DMCUB [Why] VBIOS DMCUB firmware doesn't set the dal_fw bit and we end up hanging waiting for HW power up done because of it. [How] Simplify the path and allow mailbox_rdy to be a functional check when we detect VBIOS firmware. Reviewed-by: Charlene Liu Acked-by: Rodrigo Siqueira Tested-by: Daniel Wheeler Signed-off-by: Nicholas Kazlauskas Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/amd/display/dmub/src/dmub_dcn35.c b/drivers/gpu/drm/amd/display/dmub/src/dmub_dcn35.c index 60223efc6fc8a..53f359f3fae26 100644 --- a/drivers/gpu/drm/amd/display/dmub/src/dmub_dcn35.c +++ b/drivers/gpu/drm/amd/display/dmub/src/dmub_dcn35.c @@ -555,8 +555,14 @@ uint32_t dmub_dcn35_read_inbox0_ack_register(struct dmub_srv *dmub) bool dmub_dcn35_is_hw_powered_up(struct dmub_srv *dmub) { union dmub_fw_boot_status status; + uint32_t is_enable; + + REG_GET(DMCUB_CNTL, DMCUB_ENABLE, &is_enable); + if (is_enable == 0) + return false; status.all = REG_READ(DMCUB_SCRATCH0); - return status.bits.hw_power_init_done; + return (status.bits.dal_fw && status.bits.hw_power_init_done && status.bits.mailbox_rdy) || + (!status.bits.dal_fw && status.bits.mailbox_rdy); } diff --git a/drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c b/drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c index fb66832dc9967..cd97983cf7590 100644 --- a/drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c +++ b/drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c @@ -800,20 +800,13 @@ enum dmub_status dmub_srv_cmd_execute(struct dmub_srv *dmub) bool dmub_srv_is_hw_pwr_up(struct dmub_srv *dmub) { - union dmub_fw_boot_status status; - if (!dmub->hw_funcs.is_hw_powered_up) return true; if (!dmub->hw_funcs.is_hw_powered_up(dmub)) return false; - if (!dmub->hw_funcs.is_hw_init(dmub)) - return false; - - status = dmub->hw_funcs.get_fw_status(dmub); - - return status.bits.dal_fw && status.bits.mailbox_rdy; + return true; } enum dmub_status dmub_srv_wait_for_hw_pwr_up(struct dmub_srv *dmub,