[PATCH v8 3/8] drm/msm/dpu: test DPU_PINGPONG_DSC bit before assign DSC ops to PINGPONG

[Kuogee Hsieh]

DPU < 7.0.0 has DPU_PINGPONG_DSC feature bit set to indicate it requires
both dpu_hw_pp_setup_dsc() and dpu_hw_pp_dsc_{enable,disable}() to be
executed to complete DSC configuration if DSC hardware block is present.
Hence test DPU_PINGPONG_DSC feature bit and assign DSC related functions
to the ops of PINGPONG block accordingly if DPU_PINGPONG_DSC bit is set.

changes in v6:
-- split patches, this patch has function handles DPU_PINGPONG_DSC bit

Signed-off-by: Kuogee Hsieh <quic_khs...@quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.barysh...@linaro.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.c 
b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.c
index 79e4576..e7f47a4 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.c
@@ -295,6 +295,12 @@ static void _setup_pingpong_ops(struct dpu_hw_pingpong *c,
        c->ops.enable_dsc = dpu_hw_pp_dsc_enable;
        c->ops.disable_dsc = dpu_hw_pp_dsc_disable;
 
+       if (test_bit(DPU_PINGPONG_DSC, &features)) {
+               c->ops.setup_dsc = dpu_hw_pp_setup_dsc;
+               c->ops.enable_dsc = dpu_hw_pp_dsc_enable;
+               c->ops.disable_dsc = dpu_hw_pp_dsc_disable;
+       }
+
        if (test_bit(DPU_PINGPONG_DITHER, &features))
                c->ops.setup_dither = dpu_hw_pp_setup_dither;
 };
-- 
2.7.4