[PATCH v9 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

changes in v9:
-- remove un condition assign dsc related functions to pingpong ops

Signed-off-by: Kuogee Hsieh <quic_khsieh at quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov at linaro.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

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..437d9e6 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.c
@@ -291,9 +291,12 @@ static void _setup_pingpong_ops(struct dpu_hw_pingpong *c,
 		c->ops.get_line_count = dpu_hw_pp_get_line_count;
 		c->ops.disable_autorefresh = dpu_hw_pp_disable_autorefresh;
 	}
-	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_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