diff options
| author | Nicholas Kazlauskas <[email protected]> | 2022-07-12 14:32:45 -0400 |
|---|---|---|
| committer | Alex Deucher <[email protected]> | 2022-07-25 17:15:12 -0400 |
| commit | a7cefb0b40dcfdafedc54a3ba659327d0336956d (patch) | |
| tree | b7ee4ac0e8ac6ae4d8b3cacfafcefb8c25d11554 | |
| parent | 319568d75f5f91cd4f362b26e65af2a4437c64bf (diff) | |
drm/amd/display: Guard against zero memory channels
[Why]
If BIOS doesn't specify number of memory channels then bandwidth
validation will fail due to insufficient BW in DML.
[How]
If BIOS is setting zero channels then use the default in the table.
If no entry is in the table and no BIOS value is specified then
throw an ASSERT for future developers to look into.
Reviewed-by: Michael Strauss <[email protected]>
Acked-by: Alex Hung <[email protected]>
Signed-off-by: Nicholas Kazlauskas <[email protected]>
Tested-by: Daniel Wheeler <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dcn314/dcn314_resource.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_resource.c b/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_resource.c index 450ebd838505..56ada096c89d 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_resource.c +++ b/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_resource.c @@ -1916,8 +1916,11 @@ static void dcn314_update_bw_bounding_box(struct dc *dc, struct clk_bw_params *b dcn3_14_ip.max_num_otg = dc->res_pool->res_cap->num_timing_generator; dcn3_14_ip.max_num_dpp = dc->res_pool->pipe_count; - dcn3_14_soc.num_chans = bw_params->num_channels; + if (bw_params->num_channels > 0) + dcn3_14_soc.num_chans = bw_params->num_channels; + + ASSERT(dcn3_14_soc.num_chans); ASSERT(clk_table->num_entries); /* Prepass to find max clocks independent of voltage level. */ |