From: Dillon Varone Date: Thu, 14 Apr 2022 20:57:17 +0000 (-0400) Subject: drm/amd/display: Ensure that DMCUB fw in use is loaded by DC and not VBIOS X-Git-Tag: v6.6.17~6802^2~17^2~273 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=9fe5d08fc8230adb64128986ee4af267a54e56dd;p=platform%2Fkernel%2Flinux-rpi.git drm/amd/display: Ensure that DMCUB fw in use is loaded by DC and not VBIOS [Why?] On wake from S3/S4, driver checks if DMUB is initialized. On S4 VBIOS loads DMUB, and driver does not reload as it appears to be initialized already. [How?] Add a check for the DAL_FW bit to ensure that loaded FW is from driver and not VBIOS. Signed-off-by: Dillon Varone Signed-off-by: Fangzhi Zuo Reviewed-by: Aurabindo Pillai Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/amd/display/dmub/src/dmub_dcn32.c b/drivers/gpu/drm/amd/display/dmub/src/dmub_dcn32.c index 0a49808..d298f60 100644 --- a/drivers/gpu/drm/amd/display/dmub/src/dmub_dcn32.c +++ b/drivers/gpu/drm/amd/display/dmub/src/dmub_dcn32.c @@ -299,11 +299,13 @@ void dmub_dcn32_set_outbox1_rptr(struct dmub_srv *dmub, uint32_t rptr_offset) bool dmub_dcn32_is_hw_init(struct dmub_srv *dmub) { + union dmub_fw_boot_status status; uint32_t is_hw_init; + status.all = REG_READ(DMCUB_SCRATCH0); REG_GET(DMCUB_CNTL, DMCUB_ENABLE, &is_hw_init); - return is_hw_init != 0; + return is_hw_init != 0 && status.bits.dal_fw; } bool dmub_dcn32_is_supported(struct dmub_srv *dmub)