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Date: Sun, 27 Dec 2015 19:11:36 +0200
From: Laurent Pinchart <laurent.pinchart@...asonboard.com>
To: Mauro Carvalho Chehab <mchehab@....samsung.com>
Cc: Sakari Ailus <sakari.ailus@....fi>, linux-media@...r.kernel.org,
javier@....samsung.com, hverkuil@...all.nl,
linux-kernel@...r.kernel.org, linux-omap@...r.kernel.org,
Benoît Cousson <bcousson@...libre.com>,
Arnd Bergmann <arnd@...db.de>,
linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v3 00/23] Unrestricted media entity ID range support
Hi Mauro,
On Wednesday 23 December 2015 10:32:42 Mauro Carvalho Chehab wrote:
> Em Wed, 16 Dec 2015 16:03:01 +0200 Sakari Ailus escreveu:
> > On Wed, Dec 16, 2015 at 03:32:15PM +0200, Sakari Ailus wrote:
> > > This is the third version of the unrestricted media entity ID range
> > > support set. I've taken Mauro's comments into account and fixed a number
> > > of bugs as well (omap3isp memory leak and omap4iss stream start).
> >
> > Javier: Mauro told me you might have OMAP4 hardware. Would you be able to
> > test the OMAP4 ISS with these patches?
> >
> > Thanks.
>
> Sakari,
>
> Testing with OMAP4 is not possible. The driver is broken: it doesn't
> support DT, and the required pdata definition is missing.
What do you mean by missing ? struct iss_platform_data is defined in
include/media/omap4iss.h.
> Both Javier and I tried to fix it in the last couple days, in order to test
> it with a PandaBoard. We came with the enclosed patch, but it is still
> incomplete. Based on what's written on this e-mail:
> https://www.mail-archive.com/linux-media@vger.kernel.org/msg89247.html
>
> It seems that this is an already known issue.
>
> So, I'm considering this driver as BROKEN. Not much sense on doing any
> tests on it, while this doesn't get fixed.
>
> Regards,
> Mauro
>
> PS.: With the enclosed patch, I got this error:
> [ 0.267639] platform omap4iss: failed to claim resource 2
>
> But, even if I comment out the platform code that returns this error,
> there are still other missing things:
> [ 7.131622] omap4iss omap4iss: Unable to get iss_fck clock info
> [ 7.137878] omap4iss omap4iss: Unable to get clocks
>
> ---
>
> ARM: add a pdata quirks for OMAP4 panda camera
>
> This is a hack to make it to believe that the pandaboard
> has a camera.
>
>
> diff --git a/arch/arm/mach-omap2/pdata-quirks.c
> b/arch/arm/mach-omap2/pdata-quirks.c index 1dfe34654c43..998bb6936dc0
> 100644
> --- a/arch/arm/mach-omap2/pdata-quirks.c
> +++ b/arch/arm/mach-omap2/pdata-quirks.c
> @@ -36,6 +36,8 @@
> #include "soc.h"
> #include "hsmmc.h"
>
> +#include "../../../drivers/staging/media/omap4iss/iss.h"
> +
> struct pdata_init {
> const char *compatible;
> void (*fn)(void);
> @@ -408,6 +410,124 @@ static void __init t410_abort_init(void)
> }
> #endif
>
> +#ifdef CONFIG_ARCH_OMAP4
> +
> +static struct resource panda_iss_resource[] = {
> + {
> + .start = 0x52000000,
> + .end = 0x52000000 + 0x100,
> + .name = "top",
> + .flags = IORESOURCE_MEM,
> + }, {
> + .start = 0x52001000,
> + .end = 0x52001000 + 0x170,
> + .name = "csi2_a_regs1",
> + .flags = IORESOURCE_MEM,
> + }, {
> + .start = 0x52001170,
> + .end = 0x52001170 + 0x020,
> + .name = "camerarx_core1",
> + .flags = IORESOURCE_MEM,
> + }, {
> + .start = 0x52001400,
> + .end = 0x52001400 + 0x170,
> + .name = "csi2_b_regs1",
> + .flags = IORESOURCE_MEM,
> + }, {
> + .start = 0x52001570,
> + .end = 0x52001570 + 0x020,
> + .name = "camerarx_core2",
> + .flags = IORESOURCE_MEM,
> + }, {
> + .start = 0x52002000,
> + .end = 0x52002000 + 0x200,
> + .name = "bte",
> + .flags = IORESOURCE_MEM,
> + }, {
> + .start = 0x52010000,
> + .end = 0x52010000 + 0x0a0,
> + .name = "isp_sys1",
> + .flags = IORESOURCE_MEM,
> + }, {
> + .start = 0x52010400,
> + .end = 0x52010400 + 0x400,
> + .name = "isp_resizer",
> + .flags = IORESOURCE_MEM,
> + }, {
> + .start = 0x52010800,
> + .end = 0x52010800 + 0x800,
> + .name = "isp_ipipe",
> + .flags = IORESOURCE_MEM,
> + }, {
> + .start = 0x52011000,
> + .end = 0x52011000 + 0x200,
> + .name = "isp_isif",
> + .flags = IORESOURCE_MEM,
> + }, {
> + .start = 0x52011200,
> + .end = 0x52011200 + 0x080,
> + .name = "isp_ipipeif",
> + .flags = IORESOURCE_MEM,
> + }
> +};
> +
> +static struct i2c_board_info panda_camera_i2c_device = {
> + I2C_BOARD_INFO("smia", 0x10),
> +};
> +
> +static struct iss_subdev_i2c_board_info panda_camera_subdevs[] = {
> + {
> + .board_info = &panda_camera_i2c_device,
> + .i2c_adapter_id = 3,
> + },
> +};
> +
> +static struct iss_v4l2_subdevs_group iss_subdevs[] = {
> + {
> + .subdevs = panda_camera_subdevs,
> + .interface = ISS_INTERFACE_CSI2A_PHY1,
> + .bus = {
> + .csi2 = {
> + .lanecfg = {
> + .clk = {
> + .pol = 0,
> + .pos = 2,
> + },
> + .data[0] = {
> + .pol = 0,
> + .pos = 1,
> + },
> + .data[1] = {
> + .pol = 0,
> + .pos = 3,
> + },
> + },
> + } },
> + },
> + { /* sentinel */ },
> +};
> +
> +static struct iss_platform_data iss_pdata = {
> + .subdevs = iss_subdevs,
> +};
> +
> +static struct platform_device omap4iss_device = {
> + .name = "omap4iss",
> + .id = -1,
> + .dev = {
> + .platform_data = &iss_pdata,
> + },
> + .num_resources = ARRAY_SIZE(panda_iss_resource),
> + .resource = panda_iss_resource,
> +};
> +
> +static void __init omap4_panda_legacy_init(void)
> +{
> + platform_device_register(&omap4iss_device);
> +}
> +
> +#endif /* CONFIG_ARCH_OMAP4 */
> +
> #if defined(CONFIG_ARCH_OMAP4) || defined(CONFIG_SOC_OMAP5)
> static struct iommu_platform_data omap4_iommu_pdata = {
> .reset_name = "mmu_cache",
> @@ -539,6 +659,9 @@ static struct pdata_init pdata_quirks[] __initdata = {
> #ifdef CONFIG_SOC_TI81XX
> { "hp,t410", t410_abort_init, },
> #endif
> +#ifdef CONFIG_ARCH_OMAP4
> + { "ti,omap4-panda", omap4_panda_legacy_init, },
> +#endif
> #ifdef CONFIG_SOC_OMAP5
> { "ti,omap5-uevm", omap5_uevm_legacy_init, },
> #endif
>
> diff --git a/drivers/staging/media/omap4iss/iss.c
> b/drivers/staging/media/omap4iss/iss.c index 30b473cfb020..b528cacda17b
> 100644
> --- a/drivers/staging/media/omap4iss/iss.c
> +++ b/drivers/staging/media/omap4iss/iss.c
> @@ -1412,6 +1412,9 @@ static int iss_probe(struct platform_device *pdev)
> unsigned int i;
> int ret;
>
> +
> +printk("%s: pdata=%p\n", __func__, pdata);
> +
> if (!pdata)
> return -EINVAL;
>
> @@ -1437,24 +1440,33 @@ static int iss_probe(struct platform_device *pdev)
> iss->syscon = syscon_regmap_lookup_by_compatible("syscon");
> if (IS_ERR(iss->syscon)) {
> ret = PTR_ERR(iss->syscon);
> + dev_err(iss->dev, "Unable to find syscon");
> goto error;
> }
>
> /* Clocks */
> ret = iss_map_mem_resource(pdev, iss, OMAP4_ISS_MEM_TOP);
> - if (ret < 0)
> + if (ret < 0) {
> + dev_err(iss->dev, "Unable to map memory resource\n");
> goto error;
> + }
>
> ret = iss_get_clocks(iss);
> - if (ret < 0)
> + if (ret < 0) {
> + dev_err(iss->dev, "Unable to get clocks\n");
> goto error;
> + }
>
> - if (!omap4iss_get(iss))
> + if (!omap4iss_get(iss)) {
> + dev_err(iss->dev, "Failed to acquire ISS resource\n");
> goto error;
> + }
>
> ret = iss_reset(iss);
> - if (ret < 0)
> + if (ret < 0) {
> + dev_err(iss->dev, "Unable to reset ISS\n");
> goto error_iss;
> + }
>
> iss->revision = iss_reg_read(iss, OMAP4_ISS_MEM_TOP, ISS_HL_REVISION);
> dev_info(iss->dev, "Revision %08x found\n", iss->revision);
--
Regards,
Laurent Pinchart
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