[PATCH v14 3/9] drm/display/dsc: Add drm_dsc_get_bpp_int helper

[Jessica Zhang <quic_jesszhan@quicinc.com>]

Add helper to get the integer value of drm_dsc_config.bits_per_pixel

Reviewed-by: Marijn Suijten <marijn.suijten@somainline.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Jessica Zhang <quic_jesszhan@quicinc.com>
---
 drivers/gpu/drm/display/drm_dsc_helper.c | 13 +++++++++++++
 include/drm/display/drm_dsc_helper.h     |  1 +
 2 files changed, 14 insertions(+)

diff --git a/drivers/gpu/drm/display/drm_dsc_helper.c b/drivers/gpu/drm/display/drm_dsc_helper.c
index b31fe9849784..4424380c6cb6 100644
--- a/drivers/gpu/drm/display/drm_dsc_helper.c
+++ b/drivers/gpu/drm/display/drm_dsc_helper.c
@@ -1436,6 +1436,19 @@ int drm_dsc_compute_rc_parameters(struct drm_dsc_config *vdsc_cfg)
 }
 EXPORT_SYMBOL(drm_dsc_compute_rc_parameters);
 
+/**
+ * drm_dsc_get_bpp_int() - Get integer bits per pixel value for the given DRM DSC config
+ * @vdsc_cfg: Pointer to DRM DSC config struct
+ *
+ * Return: Integer BPP value
+ */
+u32 drm_dsc_get_bpp_int(const struct drm_dsc_config *vdsc_cfg)
+{
+	WARN_ON_ONCE(vdsc_cfg->bits_per_pixel & 0xf);
+	return vdsc_cfg->bits_per_pixel >> 4;
+}
+EXPORT_SYMBOL(drm_dsc_get_bpp_int);
+
 /**
  * drm_dsc_initial_scale_value() - Calculate the initial scale value for the given DSC config
  * @dsc: Pointer to DRM DSC config struct
diff --git a/include/drm/display/drm_dsc_helper.h b/include/drm/display/drm_dsc_helper.h
index f4e18e5d077a..913aa2071232 100644
--- a/include/drm/display/drm_dsc_helper.h
+++ b/include/drm/display/drm_dsc_helper.h
@@ -27,6 +27,7 @@ int drm_dsc_setup_rc_params(struct drm_dsc_config *vdsc_cfg, enum drm_dsc_params
 int drm_dsc_compute_rc_parameters(struct drm_dsc_config *vdsc_cfg);
 u8 drm_dsc_initial_scale_value(const struct drm_dsc_config *dsc);
 u32 drm_dsc_flatness_det_thresh(const struct drm_dsc_config *dsc);
+u32 drm_dsc_get_bpp_int(const struct drm_dsc_config *vdsc_cfg);
 
 #endif /* _DRM_DSC_HELPER_H_ */
 

-- 
2.40.1