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58 lines
2.1 KiB
Diff
58 lines
2.1 KiB
Diff
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From 741fb135f1f1746a9e20b6b2445a798c1a296b75 Mon Sep 17 00:00:00 2001
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From: Naushir Patuck <naush@raspberrypi.com>
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Date: Tue, 18 Jan 2022 13:13:14 +0000
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Subject: [PATCH] drivers: bcm2835_unicam: Disable trigger mode
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operation
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On a Pi3 B/B+ platform the imx219 sensor frequently generates a single corrupt
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frame when the sensor first starts. This can either be a missing line, or
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invalid samples within the line. This only occurrs using the Unicam kernel
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driver.
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Disabling trigger mode elimiates this corruption. Since trigger mode is a
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legacy feature copied from the firmware driver and not expected to be needed,
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remove it. Tested on the Raspberry Pi cameras and shows no ill effects.
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Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
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---
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drivers/media/platform/bcm2835/bcm2835-unicam.c | 14 +-------------
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1 file changed, 1 insertion(+), 13 deletions(-)
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--- a/drivers/media/platform/bcm2835/bcm2835-unicam.c
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+++ b/drivers/media/platform/bcm2835/bcm2835-unicam.c
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@@ -983,11 +983,6 @@ static irqreturn_t unicam_isr(int irq, v
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}
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}
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- if (reg_read(unicam, UNICAM_ICTL) & UNICAM_FCM) {
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- /* Switch out of trigger mode if selected */
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- reg_write_field(unicam, UNICAM_ICTL, 1, UNICAM_TFC);
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- reg_write_field(unicam, UNICAM_ICTL, 0, UNICAM_FCM);
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- }
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return IRQ_HANDLED;
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}
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@@ -2297,8 +2292,7 @@ static void unicam_start_rx(struct unica
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reg_write_field(dev, UNICAM_ANA, 0, UNICAM_DDL);
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- /* Always start in trigger frame capture mode (UNICAM_FCM set) */
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- val = UNICAM_FSIE | UNICAM_FEIE | UNICAM_FCM | UNICAM_IBOB;
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+ val = UNICAM_FSIE | UNICAM_FEIE | UNICAM_IBOB;
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set_field(&val, line_int_freq, UNICAM_LCIE_MASK);
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reg_write(dev, UNICAM_ICTL, val);
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reg_write(dev, UNICAM_STA, UNICAM_STA_MASK_ALL);
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@@ -2411,12 +2405,6 @@ static void unicam_start_rx(struct unica
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/* Load embedded data buffer pointers if needed */
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if (dev->node[METADATA_PAD].streaming && dev->sensor_embedded_data)
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reg_write_field(dev, UNICAM_DCS, 1, UNICAM_LDP);
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-
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- /*
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- * Enable trigger only for the first frame to
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- * sync correctly to the FS from the source.
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- */
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- reg_write_field(dev, UNICAM_ICTL, 1, UNICAM_TFC);
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}
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static void unicam_disable(struct unicam_device *dev)
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