video: rockchip: dw_mipi_dsi: Fix best_rate calculation

pllref_clk is unused after being retrieved. fin needs to be set
to dsi->ref clock's rate for the following calculation to work.
Otherwise fin is undefined, and calculation return bogus number
based on undefined variable.

Signed-off-by: Ondrej Jirman <megi@xff.cz>

diff --git a/drivers/video/rockchip/dw_mipi_dsi_rockchip.c b/drivers/video/rockchip/dw_mipi_dsi_rockchip.c
index 5e8db6b..6d8b1e6 100644 (file)
--- a/drivers/video/rockchip/dw_mipi_dsi_rockchip.c
+++ b/drivers/video/rockchip/dw_mipi_dsi_rockchip.c
@@ -505,7 +505,6 @@ dw_mipi_dsi_get_lane_mbps(void *priv_data, struct display_timing *timings,
        unsigned int _prediv, best_prediv;
        unsigned long _fbdiv, best_fbdiv;
        unsigned long min_delta = ULONG_MAX;
-       unsigned int pllref_clk;
 
        bpp = mipi_dsi_pixel_format_to_bpp(format);
        if (bpp < 0) {
@@ -537,7 +536,7 @@ dw_mipi_dsi_get_lane_mbps(void *priv_data, struct display_timing *timings,
                return 0;
        }
 
-       pllref_clk = clk_get_rate(dsi->ref);
+       fin = clk_get_rate(dsi->ref);
        fout = target_mbps * USEC_PER_SEC;
 
        /* constraint: 5Mhz <= Fref / N <= 40MHz */