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drm/msm/dpu: fix clock scaling on non-sc7180 board

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c33b7c0389 ("drm/msm/dpu: add support for clk and bw scaling for
display") has added support for handling bandwidth voting in kms path in
addition to old mdss path. However this broke all other platforms since
_dpu_core_perf_crtc_update_bus() will now error out instead of properly
calculating bandwidth and core clocks. Fix
_dpu_core_perf_crtc_update_bus() to just skip bandwidth setting instead
of returning an error in case kms->num_paths == 0 (MDSS is used for
bandwidth management).

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Fixes: c33b7c0389 ("drm/msm/dpu: add support for clk and bw scaling for display")
Reviewed-by: Abhinav Kumar <abhinavk@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
This commit is contained in:
Dmitry Baryshkov 2020-10-27 13:23:04 +03:00 • committed by Rob Clark
parent 3e79527a33
commit cccdeda362
1 changed files with 3 additions and 3 deletions
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6
drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c
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@ -219,9 +219,6 @@ static int _dpu_core_perf_crtc_update_bus(struct dpu_kms *kms,
int i, ret = 0;
u64 avg_bw;
if (!kms->num_paths)
return -EINVAL;
drm_for_each_crtc(tmp_crtc, crtc->dev) {
if (tmp_crtc->enabled &&
curr_client_type ==
@ -239,6 +236,9 @@ static int _dpu_core_perf_crtc_update_bus(struct dpu_kms *kms,
}
}
if (!kms->num_paths)
return 0;
avg_bw = perf.bw_ctl;
do_div(avg_bw, (kms->num_paths * 1000)); /*Bps_to_icc*/