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7d7aa2fd92
This change makes the names of Broadcom targets consistent by using the common notation based on SoC/CPU ID (which is used internally anyway), bcmXXXX instead of brcmXXXX. This is even used for target TITLE in make menuconfig already, only the short target name used brcm so far. Despite, since subtargets range from bcm2708 to bcm2711, it seems appropriate to use bcm27xx instead of bcm2708 (again, as already done for BOARDNAME). This also renames the packages brcm2708-userland and brcm2708-gpu-fw. Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de> Acked-by: Álvaro Fernández Rojas <noltari@gmail.com>
96 lines
3.2 KiB
Diff
96 lines
3.2 KiB
Diff
From f0a4354bf8d99532577a21bb99da792fe2691626 Mon Sep 17 00:00:00 2001
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From: Philipp Zabel <p.zabel@pengutronix.de>
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Date: Thu, 21 Sep 2017 17:30:24 +0200
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Subject: [PATCH] media: tc358743: fix connected/active CSI-2 lane
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reporting
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g_mbus_config was supposed to indicate all supported lane numbers, not
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only the number of those currently in active use. Since the TC358743
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can dynamically reduce the number of active lanes if the required
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bandwidth allows for it, report all lane numbers up to the connected
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number of lanes as supported in pdata mode.
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In device tree mode, do not report lane count and clock mode at all, as
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the receiver driver can determine these from the device tree.
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To allow communicating the number of currently active lanes, add a new
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bitfield to the v4l2_mbus_config flags. This is a temporary fix, to be
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used only until a better solution is found.
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Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
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---
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drivers/media/i2c/tc358743.c | 30 ++++++++++++++++--------------
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include/media/v4l2-mediabus.h | 8 ++++++++
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2 files changed, 24 insertions(+), 14 deletions(-)
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--- a/drivers/media/i2c/tc358743.c
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+++ b/drivers/media/i2c/tc358743.c
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@@ -1606,28 +1606,29 @@ static int tc358743_g_mbus_config(struct
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struct v4l2_mbus_config *cfg)
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{
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struct tc358743_state *state = to_state(sd);
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+ const u32 mask = V4L2_MBUS_CSI2_LANE_MASK;
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+
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+ if (state->csi_lanes_in_use > state->bus.num_data_lanes)
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+ return -EINVAL;
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cfg->type = V4L2_MBUS_CSI2;
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+ cfg->flags = (state->csi_lanes_in_use << __ffs(mask)) & mask;
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+
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+ /* In DT mode, only report the number of active lanes */
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+ if (sd->dev->of_node)
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+ return 0;
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- /* Support for non-continuous CSI-2 clock is missing in the driver */
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- cfg->flags = V4L2_MBUS_CSI2_CONTINUOUS_CLOCK;
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+ /* Support for non-continuous CSI-2 clock is missing in pdata mode */
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+ cfg->flags |= V4L2_MBUS_CSI2_CONTINUOUS_CLOCK;
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- switch (state->csi_lanes_in_use) {
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- case 1:
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+ if (state->bus.num_data_lanes > 0)
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cfg->flags |= V4L2_MBUS_CSI2_1_LANE;
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- break;
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- case 2:
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+ if (state->bus.num_data_lanes > 1)
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cfg->flags |= V4L2_MBUS_CSI2_2_LANE;
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- break;
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- case 3:
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+ if (state->bus.num_data_lanes > 2)
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cfg->flags |= V4L2_MBUS_CSI2_3_LANE;
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- break;
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- case 4:
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+ if (state->bus.num_data_lanes > 3)
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cfg->flags |= V4L2_MBUS_CSI2_4_LANE;
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- break;
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- default:
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- return -EINVAL;
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- }
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return 0;
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}
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@@ -2052,6 +2053,7 @@ static int tc358743_probe(struct i2c_cli
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if (pdata) {
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state->pdata = *pdata;
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state->bus.flags = V4L2_MBUS_CSI2_CONTINUOUS_CLOCK;
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+ state->bus.num_data_lanes = 4;
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} else {
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err = tc358743_probe_of(state);
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if (err == -ENODEV)
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--- a/include/media/v4l2-mediabus.h
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+++ b/include/media/v4l2-mediabus.h
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@@ -67,6 +67,14 @@
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V4L2_MBUS_CSI2_3_LANE | V4L2_MBUS_CSI2_4_LANE)
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#define V4L2_MBUS_CSI2_CHANNELS (V4L2_MBUS_CSI2_CHANNEL_0 | V4L2_MBUS_CSI2_CHANNEL_1 | \
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V4L2_MBUS_CSI2_CHANNEL_2 | V4L2_MBUS_CSI2_CHANNEL_3)
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+/*
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+ * Number of lanes in use, 0 == use all available lanes (default)
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+ *
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+ * This is a temporary fix for devices that need to reduce the number of active
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+ * lanes for certain modes, until g_mbus_config() can be replaced with a better
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+ * solution.
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+ */
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+#define V4L2_MBUS_CSI2_LANE_MASK (0xf << 10)
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/**
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* enum v4l2_mbus_type - media bus type
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