Check in _dpu_crtc_setup_lm_bounds() that CRTC width is not overflowing LM requirements.
Signed-off-by: Dmitry Baryshkov <dmitry.barysh...@linaro.org> --- drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c index e3b1e5f55a92..c5e874a3656a 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c @@ -711,12 +711,13 @@ void dpu_crtc_complete_commit(struct drm_crtc *crtc) _dpu_crtc_complete_flip(crtc); } -static void _dpu_crtc_setup_lm_bounds(struct drm_crtc *crtc, +static int _dpu_crtc_setup_lm_bounds(struct drm_crtc *crtc, struct drm_crtc_state *state) { struct dpu_crtc_state *cstate = to_dpu_crtc_state(state); struct drm_display_mode *adj_mode = &state->adjusted_mode; u32 crtc_split_width = adj_mode->hdisplay / cstate->num_mixers; + struct dpu_kms *dpu_kms = _dpu_crtc_get_kms(crtc); int i; for (i = 0; i < cstate->num_mixers; i++) { @@ -727,7 +728,12 @@ static void _dpu_crtc_setup_lm_bounds(struct drm_crtc *crtc, r->y2 = adj_mode->vdisplay; trace_dpu_crtc_setup_lm_bounds(DRMID(crtc), i, r); + + if (drm_rect_width(r) > dpu_kms->catalog->caps->max_mixer_width) + return -E2BIG; } + + return 0; } static void _dpu_crtc_get_pcc_coeff(struct drm_crtc_state *state, @@ -1195,8 +1201,11 @@ static int dpu_crtc_atomic_check(struct drm_crtc *crtc, if (crtc_state->active_changed) crtc_state->mode_changed = true; - if (cstate->num_mixers) - _dpu_crtc_setup_lm_bounds(crtc, crtc_state); + if (cstate->num_mixers) { + rc = _dpu_crtc_setup_lm_bounds(crtc, crtc_state); + if (rc) + return rc; + } /* FIXME: move this to dpu_plane_atomic_check? */ drm_atomic_crtc_state_for_each_plane_state(plane, pstate, crtc_state) { -- 2.39.2