drm/msm/dpu: add writeback support for sc7180

Add writeback support for sc7180 devices. This has been
validated on sc7180 chromebook using IGT writeback test
suite.

localhost /usr/local/libexec/igt-gpu-tools # ./kms_writeback
Starting subtest: writeback-pixel-formats
Subtest writeback-pixel-formats: SUCCESS (0.001s)
Starting subtest: writeback-invalid-parameters
Subtest writeback-invalid-parameters: SUCCESS (0.004s)
Starting subtest: writeback-fb-id
Subtest writeback-fb-id: SUCCESS (0.009s)
Starting subtest: writeback-check-output
Subtest writeback-check-output: SUCCESS (0.203s)

Adding this will increase IGT coverage on chromebooks and also
allow using writeback functionality for other use-cases as
necessary.

Signed-off-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/485787/
Link: https://lore.kernel.org/r/20220510235439.31916-1-quic_abhinavk@quicinc.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c
index 400ebceb56bb665ae37a8650f428918d82214f7f..210becd2a9b70549bff6e66035b994eb57de8d9f 100644 (file)
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c
@@ -1803,6 +1803,8 @@ static void sc7180_cfg_init(struct dpu_mdss_cfg *dpu_cfg)
                .pingpong = sc7180_pp,
                .intf_count = ARRAY_SIZE(sc7180_intf),
                .intf = sc7180_intf,
+               .wb_count = ARRAY_SIZE(sm8250_wb),
+               .wb = sm8250_wb,
                .vbif_count = ARRAY_SIZE(sdm845_vbif),
                .vbif = sdm845_vbif,
                .reg_dma_count = 1,