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drm/amd/display: USB4 DPIA enumeration and AUX Tunneling

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[WHY]
To enable dc links for USB4 DPIA ports and AUX command tunneling
for YELLOW_CARP_B0.

[HOW]
1) Created dc links for all USB4 DPIA ports in create_links().
   dc_link_construct() implementation is split for legacy DDC and DPIAs.
   As usb4 has no ddc, ddc->ddc_pin will be set to NULL for its dc link
   and this parameter will be used to identify the dc links as DPIA. The
   dc link for DPIA is further to be enhanced with implementation for link
   encoder and link initialization.
2) usb4_dpia_count in struct resource_pool will be initialized to 4 in
   dcn31_resource_construct() if the DCN is YELLOW_CARP_B0.
3) Enabled DMUB AUX via outbox for YELLOW_CARP_B0.

Reviewed-by: Jimmy Kizito <Jimmy.Kizito@amd.com>
Acked-by: Wayne Lin <Wayne.Lin@amd.com>
Acked-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Meenakshikumar Somasundaram <meenakshikumar.somasundaram@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Meenakshikumar Somasundaram
2021-01-26 15:15:33 -05:00
committed by Alex Deucher
parent eabf2019b7
commit 9fa0fb7713
8 changed files with 120 additions and 5 deletions
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6
drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hwseq.c
View File

@@ -174,6 +174,10 @@ void dcn31_init_hw(struct dc *dc)
if (hws->funcs.dsc_pg_control != NULL)
hws->funcs.dsc_pg_control(hws, res_pool->dscs[i]->inst, false);
/* Enables outbox notifications for usb4 dpia */
if (dc->res_pool->usb4_dpia_count)
dmub_enable_outbox_notification(dc);
/* we want to turn off all dp displays before doing detection */
if (dc->config.power_down_display_on_boot)
blank_all_dp_displays(dc, true);
@@ -278,8 +282,10 @@ void dcn31_init_hw(struct dc *dc)
if (dc->res_pool->hubbub->funcs->force_pstate_change_control)
dc->res_pool->hubbub->funcs->force_pstate_change_control(
dc->res_pool->hubbub, false, false);
#if defined(CONFIG_DRM_AMD_DC_DCN)
if (dc->res_pool->hubbub->funcs->init_crb)
dc->res_pool->hubbub->funcs->init_crb(dc->res_pool->hubbub);
#endif
}
void dcn31_dsc_pg_control(