[PATCH 1/3] drm/drm_dp_helper: export link symbol cycles calculation

[Arun R Murthy]

Link symbol cycles are required for the calculation of the minimum
HBlank calculation.

Signed-off-by: Arun R Murthy <arun.r.murthy at intel.com>
---
 drivers/gpu/drm/display/drm_dp_helper.c | 10 ++++++----
 include/drm/display/drm_dp_helper.h     |  5 +++++
 2 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/display/drm_dp_helper.c b/drivers/gpu/drm/display/drm_dp_helper.c
index 57828f2b7b5a0582ca4a6f2a9be2d5909fe8ad24..488aaef61e3aa8b25975dfc98cbccdf5b7f083f8 100644
--- a/drivers/gpu/drm/display/drm_dp_helper.c
+++ b/drivers/gpu/drm/display/drm_dp_helper.c
@@ -4393,17 +4393,18 @@ EXPORT_SYMBOL(drm_panel_dp_aux_backlight);
 #endif
 
 /* See DP Standard v2.1 2.6.4.4.1.1, 2.8.4.4, 2.8.7 */
-static int drm_dp_link_symbol_cycles(int lane_count, int pixels, int bpp_x16,
-				     int symbol_size, bool is_mst)
+int drm_dp_link_symbol_cycles(int lane_count, int pixels, int bpp_x16,
+			      int symbol_size, bool is_mst)
 {
 	int cycles = DIV_ROUND_UP(pixels * bpp_x16, 16 * symbol_size * lane_count);
 	int align = is_mst ? 4 / lane_count : 1;
 
 	return ALIGN(cycles, align);
 }
+EXPORT_SYMBOL(drm_dp_link_symbol_cycles);
 
-static int drm_dp_link_dsc_symbol_cycles(int lane_count, int pixels, int slice_count,
-					 int bpp_x16, int symbol_size, bool is_mst)
+int drm_dp_link_dsc_symbol_cycles(int lane_count, int pixels, int slice_count,
+				  int bpp_x16, int symbol_size, bool is_mst)
 {
 	int slice_pixels = DIV_ROUND_UP(pixels, slice_count);
 	int slice_data_cycles = drm_dp_link_symbol_cycles(lane_count, slice_pixels,
@@ -4412,6 +4413,7 @@ static int drm_dp_link_dsc_symbol_cycles(int lane_count, int pixels, int slice_c
 
 	return slice_count * (slice_data_cycles + slice_eoc_cycles);
 }
+EXPORT_SYMBOL(drm_dp_link_dsc_symbol_cycles);
 
 /**
  * drm_dp_bw_overhead - Calculate the BW overhead of a DP link stream
diff --git a/include/drm/display/drm_dp_helper.h b/include/drm/display/drm_dp_helper.h
index d9614e2c89397536f44bb7258e894628ae1dccc9..f6bfa3b74810438b837540dccb08a987bcdb5d03 100644
--- a/include/drm/display/drm_dp_helper.h
+++ b/include/drm/display/drm_dp_helper.h
@@ -972,4 +972,9 @@ int drm_dp_max_dprx_data_rate(int max_link_rate, int max_lanes);
 
 ssize_t drm_dp_vsc_sdp_pack(const struct drm_dp_vsc_sdp *vsc, struct dp_sdp *sdp);
 
+int drm_dp_link_symbol_cycles(int lane_count, int pixels, int bpp_x16,
+			      int symbol_size, bool is_mst);
+int drm_dp_link_dsc_symbol_cycles(int lane_count, int pixels, int slice_count,
+				  int bpp_x16, int symbol_size, bool is_mst);
+
 #endif /* _DRM_DP_HELPER_H_ */

-- 
2.25.1