Jessica Zhang <quic_jesszhan@xxxxxxxxxxx> 于2025年1月9日周四 09:29写道： > > > > On 12/18/2024 11:49 PM, Jun Nie wrote: > > Add the case to reserve multiple pairs mixers for high resolution. > > Current code only supports one pair of mixer usage case. To support > > quad-pipe usage case, two pairs of mixers are needed. > > > > Current code resets number of mixer on failure of pair's peer test and > > retry on another pair. If two pairs are needed, the failure on the test > > of 2nd pair results clearing to the 1st pair. This patch only clear the > > bit for the 2nd pair allocation before retry on another pair. > > Hi Jun, > > I think the commit message wording is a bit unclear. Maybe something > like "Reset the current lm_count to an even number instead of completely > clearing it. This prevents all pairs from being cleared in cases where > multiple LM pairs are needed" Thanks for the suggestion! Will adopt it. > > > > > Signed-off-by: Jun Nie <jun.nie@xxxxxxxxxx> > > --- > > drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c | 6 +++++- > > 1 file changed, 5 insertions(+), 1 deletion(-) > > > > diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c > > index cde3c5616f9bc..a8b01b78c02c7 100644 > > --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c > > +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c > > @@ -316,7 +316,11 @@ static int _dpu_rm_reserve_lms(struct dpu_rm *rm, > > if (!rm->mixer_blks[i]) > > continue; > > > > - lm_count = 0; > > + /* > > + * Clear the last bit to drop the previous primary mixer if > > + * fail to find its peer. > > Same here can we reword it to something like "Reset lm_count to an even > index. This will drop the previous primary mixer if ..." Will do. > > > + */ > > + lm_count &= 0xfe; > > Nit: Can we directly clear the first bit instead of doing an 8-bit bitmask? Could you elaborate on it? Or you are suggesting to mask 0xFFFFFFFE? - Jun > > Thanks, > > Jessica Zhang > > > lm_idx[lm_count] = i; > > > > if (!_dpu_rm_check_lm_and_get_connected_blks(rm, global_state, > > > > -- > > 2.34.1 > > >
