2019-09-19 14:43:19 +00:00
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From 4f1be827b5873b2aaa9003a2d38ba6b941ceb66d Mon Sep 17 00:00:00 2001
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2019-07-09 18:32:28 +00:00
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From: Dave Stevenson <dave.stevenson@raspberrypi.org>
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Date: Wed, 31 Oct 2018 14:56:59 +0000
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2019-09-19 14:43:19 +00:00
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Subject: [PATCH 190/806] media: tc358743: Increase FIFO level to 374.
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2019-07-09 18:32:28 +00:00
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The existing fixed value of 16 worked for UYVY 720P60 over
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2 lanes at 594MHz, or UYVY 1080P60 over 4 lanes. (RGB888
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1080P60 needs 6 lanes at 594MHz).
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It doesn't allow for lower resolutions to work as the FIFO
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underflows.
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374 is required for 1080P24-30 UYVY over 2 lanes @ 972Mbit/s, but
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>374 means that the FIFO underflows on 1080P50 UYVY over 2 lanes
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@ 972Mbit/s.
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
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---
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drivers/media/i2c/tc358743.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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--- a/drivers/media/i2c/tc358743.c
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+++ b/drivers/media/i2c/tc358743.c
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@@ -1946,7 +1946,7 @@ static int tc358743_probe_of(struct tc35
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state->pdata.ddc5v_delay = DDC5V_DELAY_100_MS;
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state->pdata.enable_hdcp = false;
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/* A FIFO level of 16 should be enough for 2-lane 720p60 at 594 MHz. */
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- state->pdata.fifo_level = 16;
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+ state->pdata.fifo_level = 374;
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/*
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* The PLL input clock is obtained by dividing refclk by pll_prd.
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* It must be between 6 MHz and 40 MHz, lower frequency is better.
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