Hi Tim,
On 01/11/2017 03:14 PM, Tim Harvey wrote:
<snip>
Hi Steve,
I took a stab at testing this today on a gw51xx which has an adv7180
hooked up as follows:
- i2c3@0x20
- 8bit data bus from DAT12 to DAT19, HSYNC, VSYNC, PIXCLK on CSI0 pads
(CSI0_IPU1)
- PWRDWN# on MX6QDL_PAD_CSI0_DATA_EN__GPIO5_IO20
- IRQ# on MX6QDL_PAD_CSI0_DAT5__GPIO5_IO23
- all three analog inputs available to off-board connector
My patch to the imx6qdl-gw51xx dtsi is:
As long as you used the patch to imx6qdl-sabreauto.dtsti that adds
the adv7180 support as a guide, you should be ok here.
<snip>
On an IMX6Q I'm getting the following when the adv7180 module loads:
[ 12.862477] adv7180 2-0020: chip found @ 0x20 (21a8000.i2c)
[ 12.907767] imx-media: Registered subdev adv7180 2-0020
[ 12.907793] imx-media soc:media@0: Entity type for entity adv7180
2-0020 was not initialized!
[ 12.907867] imx-media: imx_media_create_link: adv7180 2-0020:0 ->
ipu1_csi0_mux:1
Is the warning that adv7180 was not initialized expected and or an issue?
Yeah it's still a bug in the adv7180 driver, needs fixing.
Now that your driver is hooking into the current media framework, I'm
not at all clear on how to link and configure the media entities.
It's all documented at Documentation/media/v4l-drivers/imx.rst.
Follow the SabreAuto pipeline setup example.
<snip>
Additionally I've found that on an IMX6S/IMX6DL we crash while
registering the media-ic subdev's:
[ 3.975473] imx-media: Registered subdev ipu1_csi1_mux
[ 3.980921] imx-media: Registered subdev ipu1_csi0_mux
[ 4.003205] imx-media: Registered subdev ipu1_ic_prpenc
[ 4.025373] imx-media: Registered subdev ipu1_ic_prpvf
[ 4.037944] ------------[ cut here ]------------
[ 4.042571] Kernel BUG at c06717dc [verbose debug info unavailable]
[ 4.048845] Internal error: Oops - BUG: 0 [#1] SMP ARM
[ 4.053990] Modules linked in:
[ 4.057076] CPU: 1 PID: 1 Comm: swapper/0 Not tainted
4.9.0-rc6-00524-g84dad6e-dirty #446
[ 4.065260] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
...
[ 4.296250] [<c0671780>] (v4l2_subdev_init) from [<c06fb02c>]
(imx_ic_probe+0x94/0x1ac)
[ 4.304271] [<c06faf98>] (imx_ic_probe) from [<c05173d8>]
(platform_drv_probe+0x54/0xb8)
[ 4.312373] r9:c0d5e858 r8:00000000 r7:fffffdfb r6:c0e5dbf8
r5:da603810 r4:c16738d8
[ 4.320129] [<c0517384>] (platform_drv_probe) from [<c0515978>]
(driver_probe_device+0x20c/0x2c0)
[ 4.329010] r7:c0e5dbf8 r6:00000000 r5:da603810 r4:c16738d8
[ 4.334681] [<c051576c>] (driver_probe_device) from [<c0515af4>]
(__driver_attach+0xc8/0xcc)
[ 4.343129] r9:c0d5e858 r8:00000000 r7:00000000 r6:da603844
r5:c0e5dbf8 r4:da603810
[ 4.350889] [<c0515a2c>] (__driver_attach) from [<c0513adc>]
(bus_for_each_dev+0x74/0xa8)
[ 4.359078] r7:00000000 r6:c0515a2c r5:c0e5dbf8 r4:00000000
[ 4.364753] [<c0513a68>] (bus_for_each_dev) from [<c05151d4>]
(driver_attach+0x20/0x28)
I assume there is an iteration that needs a test on a missing pointer
only available on chips with both IPU's or PRP
Yep, I only have quad boards here so I haven't gotten around to
testing on S/DL.
But it looks like I forgot to clear out the csi subdev pointer array before
passing it to imx_media_of_parse(). I think that might explain the OOPS
above. Try this patch:
diff --git a/drivers/staging/media/imx/imx-media-dev.c
b/drivers/staging/media/imx/imx-media-dev.c
index 357654d..0cf2d61 100644
--- a/drivers/staging/media/imx/imx-media-dev.c
+++ b/drivers/staging/media/imx/imx-media-dev.c
@@ -379,7 +379,7 @@ static int imx_media_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *node = dev->of_node;
- struct imx_media_subdev *csi[4];
+ struct imx_media_subdev *csi[4] = {0};
struct imx_media_dev *imxmd;
int ret;
Steve
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