6.6-stable review patch. If anyone has any objections, please let me know.
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From: Dmitry Baryshkov dmitry.baryshkov@linaro.org
[ Upstream commit 3a0851b442d1f63ba42ecfa2506d3176cfabf9d4 ]
Make _dpu_crtc_setup_lm_bounds() check that CRTC width is not overflowing LM requirements. Rename the function accordingly.
Fixes: 25fdd5933e4c ("drm/msm: Add SDM845 DPU support") Reviewed-by: Abhinav Kumar quic_abhinavk@quicinc.com Tested-by: Abhinav Kumar quic_abhinavk@quicinc.com # sc7280 Signed-off-by: Dmitry Baryshkov dmitry.baryshkov@linaro.org Patchwork: https://patchwork.freedesktop.org/patch/612237/ Link: https://lore.kernel.org/r/20240903-dpu-mode-config-width-v6-3-617e1ecc4b7a@l... Signed-off-by: Abhinav Kumar quic_abhinavk@quicinc.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c index e238e4e8116ca..ad57368dc13f0 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c @@ -722,12 +722,13 @@ 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_check_and_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++) { @@ -738,7 +739,12 @@ 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, @@ -814,7 +820,7 @@ static void dpu_crtc_atomic_begin(struct drm_crtc *crtc,
DRM_DEBUG_ATOMIC("crtc%d\n", crtc->base.id);
- _dpu_crtc_setup_lm_bounds(crtc, crtc->state); + _dpu_crtc_check_and_setup_lm_bounds(crtc, crtc->state);
/* encoder will trigger pending mask now */ drm_for_each_encoder_mask(encoder, crtc->dev, crtc->state->encoder_mask) @@ -1208,8 +1214,11 @@ 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_check_and_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) {