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video: rockchip: dw_mipi_dsi: Fix best_rate calculation

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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>
This commit is contained in:
Ondrej Jirman
2023-05-22 23:47:06 +02:00
committed by Anatolij Gustschin
parent 4158d7f987
commit dc3f2403c2
1 changed files with 1 additions and 2 deletions
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3
drivers/video/rockchip/dw_mipi_dsi_rockchip.c
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@@ -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 */