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Subject: media: mtk-cir: fix calculation of chk period Author: Sean Young <[email protected]> Date: Sun Nov 29 18:01:26 2020 +0100 Since commit 528222d853f9 ("media: rc: harmonize infrared durations to microseconds"), the calculation of the chk period is wrong. As a result, all reported IR will have incorrect timings. Now that the calculations are done in microseconds rather than nanoseconds, we can fold the calculations in a simpler form with less rounding error. Tested-by: Frank Wunderlich <[email protected]> Fixes: 528222d853f9 ("media: rc: harmonize infrared durations to microseconds") Signed-off-by: Sean Young <[email protected]> Signed-off-by: Mauro Carvalho Chehab <[email protected]> drivers/media/rc/mtk-cir.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) --- diff --git a/drivers/media/rc/mtk-cir.c b/drivers/media/rc/mtk-cir.c index 5051a5e5244b..65a136c0fac2 100644 --- a/drivers/media/rc/mtk-cir.c +++ b/drivers/media/rc/mtk-cir.c @@ -151,15 +151,12 @@ static inline u32 mtk_chk_period(struct mtk_ir *ir) { u32 val; - /* Period of raw software sampling in ns */ - val = DIV_ROUND_CLOSEST(1000000000ul, - clk_get_rate(ir->bus) / ir->data->div); - /* * Period for software decoder used in the * unit of raw software sampling */ - val = DIV_ROUND_CLOSEST(MTK_IR_SAMPLE, val); + val = DIV_ROUND_CLOSEST(clk_get_rate(ir->bus), + USEC_PER_SEC * ir->data->div / MTK_IR_SAMPLE); dev_dbg(ir->dev, "@pwm clk = \t%lu\n", clk_get_rate(ir->bus) / ir->data->div); @@ -412,7 +409,7 @@ static int mtk_ir_probe(struct platform_device *pdev) mtk_irq_enable(ir, MTK_IRINT_EN); dev_info(dev, "Initialized MT7623 IR driver, sample period = %dus\n", - DIV_ROUND_CLOSEST(MTK_IR_SAMPLE, 1000)); + MTK_IR_SAMPLE); return 0; _______________________________________________ linuxtv-commits mailing list [email protected] https://www.linuxtv.org/cgi-bin/mailman/listinfo/linuxtv-commits
