OMAPDSS: DISPC: scaler debug print

Improve the DISPC debug print for scaling.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

1 files changed, 16 insertions, 2 deletions

diff --git a/drivers/video/fbdev/omap2/dss/dispc.c b/drivers/video/fbdev/omap2/dss/dispc.c
index 646d94a71a79..f8c9115cdb4b 100644
--- a/drivers/video/fbdev/omap2/dss/dispc.c
+++ b/drivers/video/fbdev/omap2/dss/dispc.c
@@ -2418,6 +2418,9 @@ static int dispc_ovl_calc_scaling_44xx(unsigned long pclk, unsigned long lclk,
         return 0;
 }
 
+#define DIV_FRAC(dividend, divisor) \
+        ((dividend) * 100 / (divisor) - ((dividend) / (divisor) * 100))
+
 static int dispc_ovl_calc_scaling(unsigned long pclk, unsigned long lclk,
                 enum omap_overlay_caps caps,
                 const struct omap_video_timings *mgr_timings,
@@ -2477,8 +2480,19 @@ static int dispc_ovl_calc_scaling(unsigned long pclk, unsigned long lclk,
         if (ret)
                 return ret;
 
-        DSSDBG("required core clk rate = %lu Hz\n", core_clk);
-        DSSDBG("current core clk rate = %lu Hz\n", dispc_core_clk_rate());
+        DSSDBG("%dx%d -> %dx%d (%d.%02d x %d.%02d), decim %dx%d %dx%d (%d.%02d x %d.%02d), taps %d, req clk %lu, cur clk %lu\n",
+                width, height,
+                out_width, out_height,
+                out_width / width, DIV_FRAC(out_width, width),
+                out_height / height, DIV_FRAC(out_height, height),
+
+                decim_x, decim_y,
+                width / decim_x, height / decim_y,
+                out_width / (width / decim_x), DIV_FRAC(out_width, width / decim_x),
+                out_height / (height / decim_y), DIV_FRAC(out_height, height / decim_y),
+
+                *five_taps ? 5 : 3,
+                core_clk, dispc_core_clk_rate());
 
         if (!core_clk || core_clk > dispc_core_clk_rate()) {
                 DSSERR("failed to set up scaling, "