From: Nicholas Kazlauskas Date: Mon, 14 Dec 2020 15:50:33 +0000 (-0500) Subject: drm/amd/display: Fix reset sequence with driver direct DMCUB fw load X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=d740a39c3dde99f9d8afc5aff8e56bdb48d8be9b;p=linux.git drm/amd/display: Fix reset sequence with driver direct DMCUB fw load [Why] DMCUB encounters a page fault/double exception with driver direct load because DMCUB is not held in soft reset after releasing secure reset. The clean shutdown sequence via GPINT is also not executed in this sequence which leaves hardware behavior in an indeterminate state. [How] Move reset earlier in the sequence. Tested-by: Daniel Wheeler Signed-off-by: Nicholas Kazlauskas Reviewed-by: Eric Yang Acked-by: Anson Jacob Signed-off-by: Alex Deucher --- 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 d2588b7cd3255..61f64a295f06a 100644 --- a/drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c +++ b/drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c @@ -406,6 +406,9 @@ enum dmub_status dmub_srv_hw_init(struct dmub_srv *dmub, dmub->fb_offset = params->fb_offset; dmub->psp_version = params->psp_version; + if (dmub->hw_funcs.reset) + dmub->hw_funcs.reset(dmub); + if (inst_fb && data_fb) { cw0.offset.quad_part = inst_fb->gpu_addr; cw0.region.base = DMUB_CW0_BASE; @@ -427,9 +430,6 @@ enum dmub_status dmub_srv_hw_init(struct dmub_srv *dmub, } - if (dmub->hw_funcs.reset) - dmub->hw_funcs.reset(dmub); - if (inst_fb && data_fb && bios_fb && mail_fb && tracebuff_fb && fw_state_fb && scratch_mem_fb) { cw2.offset.quad_part = data_fb->gpu_addr;