On Mon, Dec 09, 2024 at 12:15:57PM -0800, Abhinav Kumar wrote: > On chipsets such as QCS615, there is no 3dmux present. In such > a case, a layer exceeding the max_mixer_width cannot be split, > hence cannot be supported. > > Filter out the modes which exceed the max_mixer_width when there > is no 3dmux present. Also, add a check in the dpu_crtc_atomic_check() > to return failure for such modes. > > Signed-off-by: Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx> > --- > Note: this was only compile tested, so its pending validation on QCS615 > --- > Changes in v2: > - replace MODE_BAD with MODE_BAD_HVALUE to indicate the failure better > - Link to v1: https://lore.kernel.org/r/20241206-no_3dmux-v1-1-72ad2677a323@xxxxxxxxxxx > --- > drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c | 13 +++++++++++++ > 1 file changed, 13 insertions(+) > > diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c > index 9f6ffd344693ecfb633095772a31ada5613345dc..87d76f388bef48c880ae70ddcdb76ccb0336ad32 100644 > --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c > +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c > @@ -732,6 +732,13 @@ static int _dpu_crtc_check_and_setup_lm_bounds(struct drm_crtc *crtc, > struct dpu_kms *dpu_kms = _dpu_crtc_get_kms(crtc); > int i; > > + /* if we cannot merge 2 LMs (no 3d mux) better to fail earlier > + * before even checking the width after the split > + */ > + if (!dpu_kms->catalog->caps->has_3d_merge > + && adj_mode->hdisplay > dpu_kms->catalog->caps->max_mixer_width) Excuse me that I didn't notice that earlier. && should go to the previous line, not to the next line. > + return -E2BIG; > + > for (i = 0; i < cstate->num_mixers; i++) { > struct drm_rect *r = &cstate->lm_bounds[i]; > r->x1 = crtc_split_width * i; > @@ -1251,6 +1258,12 @@ static enum drm_mode_status dpu_crtc_mode_valid(struct drm_crtc *crtc, > { > struct dpu_kms *dpu_kms = _dpu_crtc_get_kms(crtc); > > + /* if there is no 3d_mux block we cannot merge LMs so we cannot > + * split the large layer into 2 LMs, filter out such modes > + */ > + if (!dpu_kms->catalog->caps->has_3d_merge > + && mode->hdisplay > dpu_kms->catalog->caps->max_mixer_width) > + return MODE_BAD_HVALUE; > /* > * max crtc width is equal to the max mixer width * 2 and max height is 4K > */ > > --- > base-commit: af2ea8ab7a546b430726183458da0a173d331272 > change-id: 20241206-no_3dmux-521a55ea0669 > > Best regards, > -- > Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx> > -- With best wishes Dmitry
