diff options
| author | Ken Chalmers <ken.chalmers@amd.com> | 2018-08-10 15:51:59 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2018-08-27 15:20:24 -0500 |
| commit | 18e4aa33bdfba0e7ac4e5a62d0665becb78ce012 (patch) | |
| tree | de64931f90aa5a437d15c25b37e212a3363e2cd1 /drivers | |
| parent | e498eb7136042aa9a352b1039c678537f4694158 (diff) | |
drm/amd/display: eliminate long wait between register polls on Maximus
[Why]
Now that we "scale" time delays correctly on Maximus (as of diags svn
r170115), the forced "35 ms" wait time now becomes 35 ms * 500 = 17.5
seconds, which is far too long. Even having to repeat polling a
register once causes excessive delays on Maximus.
[How]
Just use the regular wait time passed to the generic_reg_wait()
function. This is sufficient for Maximus now, and it also means that
there's one less "Maximus-only" code path in DAL.
Also disable the "REG_WAIT taking a while:" message on Maximus, since
things do take a while longer there and 1-2ms delays are not uncommon
(and nothing to worry about).
Signed-off-by: Ken Chalmers <ken.chalmers@amd.com>
Reviewed-by: Eric Bernstein <Eric.Bernstein@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dc_helper.c | 9 |
1 files changed, 2 insertions, 7 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dc_helper.c b/drivers/gpu/drm/amd/display/dc/dc_helper.c index e68077e65565..fcfd50b5dba0 100644 --- a/drivers/gpu/drm/amd/display/dc/dc_helper.c +++ b/drivers/gpu/drm/amd/display/dc/dc_helper.c @@ -219,12 +219,6 @@ uint32_t generic_reg_wait(const struct dc_context *ctx, /* something is terribly wrong if time out is > 200ms. (5Hz) */ ASSERT(delay_between_poll_us * time_out_num_tries <= 200000); - if (IS_FPGA_MAXIMUS_DC(ctx->dce_environment)) { - /* 35 seconds */ - delay_between_poll_us = 35000; - time_out_num_tries = 1000; - } - for (i = 0; i <= time_out_num_tries; i++) { if (i) { if (delay_between_poll_us >= 1000) @@ -238,7 +232,8 @@ uint32_t generic_reg_wait(const struct dc_context *ctx, field_value = get_reg_field_value_ex(reg_val, mask, shift); if (field_value == condition_value) { - if (i * delay_between_poll_us > 1000) + if (i * delay_between_poll_us > 1000 && + !IS_FPGA_MAXIMUS_DC(ctx->dce_environment)) dm_output_to_console("REG_WAIT taking a while: %dms in %s line:%d\n", delay_between_poll_us * i / 1000, func_name, line); |