diff options
author | Mustapha Ghaddar <mghaddar@amd.com> | 2023-02-27 16:04:39 +0300 |
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committer | Alex Deucher <alexander.deucher@amd.com> | 2023-03-14 22:35:32 +0300 |
commit | d142d4113fd5c3f7afdb48dff4703ae7edddf53d (patch) | |
tree | e66eb381446b4d3a05f5721cce2351e9e005de16 /drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.c | |
parent | 5d04d13954479292dd45e38a46dfa31abb8dc2e0 (diff) | |
download | linux-d142d4113fd5c3f7afdb48dff4703ae7edddf53d.tar.xz |
drm/amd/display: Add Validate BW for USB4 Links
[WHY]
To validate the BW used for DPIAs per HostRouter
[HOW]
Add the Validate function in C source file
Reviewed-by: Wenjing Liu <Wenjing.Liu@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Mustapha Ghaddar <mghaddar@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.c')
-rw-r--r-- | drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.c index 2f0311c42f90..2e251dcbb022 100644 --- a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.c +++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.c @@ -33,6 +33,10 @@ #define DC_LOGGER \ link->ctx->logger +/* Number of Host Routers per motherboard is 2 */ +#define MAX_HR_NUM 2 +/* Number of DPIA per host router is 2 */ +#define MAX_DPIA_NUM (MAX_HR_NUM * 2) #define Kbps_TO_Gbps (1000 * 1000) // ------------------------------------------------------------------ @@ -458,3 +462,33 @@ int link_dp_dpia_allocate_usb4_bandwidth_for_stream(struct dc_link *link, int re out: return ret; } +bool dpia_validate_usb4_bw(struct dc_link **link, int *bw_needed_per_dpia, uint8_t num_dpias) +{ + bool ret = true; + int bw_needed_per_hr[MAX_HR_NUM] = { 0, 0 }; + uint8_t lowest_dpia_index = 0, dpia_index = 0; + + if (!num_dpias || num_dpias > MAX_DPIA_NUM) + return ret; + + //Get total Host Router BW & Validate against each Host Router max BW + for (uint8_t i = 0; i < num_dpias; ++i) { + + if (!link[i]->dpia_bw_alloc_config.bw_alloc_enabled) + continue; + + lowest_dpia_index = get_lowest_dpia_index(link[i]); + if (link[i]->link_index < lowest_dpia_index) + continue; + + dpia_index = (link[i]->link_index - lowest_dpia_index) / 2; + bw_needed_per_hr[dpia_index] += bw_needed_per_dpia[i]; + if (bw_needed_per_hr[dpia_index] > get_host_router_total_bw(link[i], HOST_ROUTER_BW_ALLOCATED)) { + + ret = false; + break; + } + } + + return ret; +} |