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<59c53104-b120-467b-b232-81c2519e2da5@nxp.com> Date: Wed, 4 Feb 2026 15:04:38 +0100 User-Agent: Mozilla Thunderbird Subject: Re: Re: [RFC v1 07/11] media: Add meta formats supported by NXP neoisp driver To: Jacopo Mondi Cc: julien.vuillaumier@nxp.com, alexi.birlinger@nxp.com, daniel.baluta@nxp.com, peng.fan@nxp.com, frank.li@nxp.com, laurent.pinchart@ideasonboard.com, mchehab@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org References: <20260123080938.3367348-1-antoine.bouyer@nxp.com> <20260123080938.3367348-8-antoine.bouyer@nxp.com> Content-Language: fr From: Antoine Bouyer In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-ClientProxiedBy: AS4P191CA0039.EURP191.PROD.OUTLOOK.COM (2603:10a6:20b:657::24) To 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X-MS-Exchange-CrossTenant-UserPrincipalName: IMUnRnyyBAd++1mRT3iLJpNeqI6jG5AzrcfBgQYoQ9P88NdiJfB0ZfoV3ZOWKpEKjif7kyLm8wZgu/Ck2IsJ4w== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DU2PR04MB8504 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260204_060448_976353_7B35E2C7 X-CRM114-Status: GOOD ( 21.41 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Jacopo Le 04/02/2026 à 14:36, Jacopo Mondi a écrit : > > Hi Antoine > > On Wed, Feb 04, 2026 at 02:31:47PM +0100, Antoine Bouyer wrote: >> Hi Jacopo >> >> Le 03/02/2026 à 18:11, Jacopo Mondi a écrit : >>> >>> Hi Antoine >>> >>> On Fri, Jan 23, 2026 at 09:09:34AM +0100, Antoine Bouyer wrote: >>>> This patch adds new v4l2 meta formats definitions and descriptions used by >>>> neoisp driver for the parameters and statistics buffers: >>>> - `V4L2_META_FMT_NEO_ISP_PARAMS` used for the legacy fixed-size >>>> parameters buffer structure. >>>> - `V4L2_META_FMT_NEO_ISP_EXT_PARAMS` used for the generic v4l2-isp >>>> extensible parameters structure, supporting a non-fixed-size buffer and >>>> changeable ISP configuration blocks. >>>> - `V4L2_META_FMT_NEO_ISP_STATS` used for the legacy fixed-size statistics >>>> buffer structure. >>>> - `V4L2_META_FMT_NEO_ISP_EXT_STATS` used for the generic v4l2-isp >>>> extensible statistics structure, supporting a non-fixed-size buffer >>>> and changeable ISP statistics blocks. >>> >>> Uh interesting, you have existing userspace that needs legacy formats ? >> >> Yes we do have some available here (version with extensible formats will be >> the next one): >> https://github.com/nxp-imx/libcamera >> >> Not in mainline, thought. > > I see. > > However I don't think the mainline driver should support both formats. ok. I'm fine with starting from a fresh version, extensible-format-only, in mainline. That would also simplify the patch series then, so as Documentation, and maintainance. > > And looking at your libcamera branch, it seem it already supports the > extensible version. > Oh yes you're correct. I thought it started from 6.18, sorry for confusion. One more reason to move to extensible-format-only in mainline then: it is verified since a while without any regression compared to legacy. BR Antoine > >> >> BR >> Antoine >> >>> >>>> >>>> Signed-off-by: Antoine Bouyer >>>> --- >>>> drivers/media/v4l2-core/v4l2-ioctl.c | 4 ++++ >>>> include/uapi/linux/videodev2.h | 6 ++++++ >>>> 2 files changed, 10 insertions(+) >>>> >>>> diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c >>>> index 37d33d4a363d..c797cf11be38 100644 >>>> --- a/drivers/media/v4l2-core/v4l2-ioctl.c >>>> +++ b/drivers/media/v4l2-core/v4l2-ioctl.c >>>> @@ -1471,6 +1471,10 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt) >>>> case V4L2_META_FMT_C3ISP_STATS: descr = "Amlogic C3 ISP Statistics"; break; >>>> case V4L2_META_FMT_MALI_C55_PARAMS: descr = "ARM Mali-C55 ISP Parameters"; break; >>>> case V4L2_META_FMT_MALI_C55_STATS: descr = "ARM Mali-C55 ISP 3A Statistics"; break; >>>> + case V4L2_META_FMT_NEO_ISP_PARAMS: descr = "NXP Neo ISP 3A Parameters"; break; >>>> + case V4L2_META_FMT_NEO_ISP_EXT_PARAMS: descr = "NXP Neo ISP ext 3A Parameters"; break; >>>> + case V4L2_META_FMT_NEO_ISP_STATS: descr = "NXP Neo ISP 3A Statistics"; break; >>>> + case V4L2_META_FMT_NEO_ISP_EXT_STATS: descr = "NXP Neo ISP ext 3A Statistics"; break; >>>> case V4L2_PIX_FMT_NV12_8L128: descr = "NV12 (8x128 Linear)"; break; >>>> case V4L2_PIX_FMT_NV12M_8L128: descr = "NV12M (8x128 Linear)"; break; >>>> case V4L2_PIX_FMT_NV12_10BE_8L128: descr = "10-bit NV12 (8x128 Linear, BE)"; break; >>>> diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h >>>> index 848e86617d5c..5f4992452c66 100644 >>>> --- a/include/uapi/linux/videodev2.h >>>> +++ b/include/uapi/linux/videodev2.h >>>> @@ -889,6 +889,12 @@ struct v4l2_pix_format { >>>> #define V4L2_META_FMT_MALI_C55_PARAMS v4l2_fourcc('C', '5', '5', 'P') /* ARM Mali-C55 Parameters */ >>>> #define V4L2_META_FMT_MALI_C55_STATS v4l2_fourcc('C', '5', '5', 'S') /* ARM Mali-C55 3A Statistics */ >>>> >>>> +/* Vendor specific - used for NXP NEOISP sub-system */ >>>> +#define V4L2_META_FMT_NEO_ISP_PARAMS v4l2_fourcc('N', 'N', 'I', 'P') /* NXP NEOISP Parameters */ >>>> +#define V4L2_META_FMT_NEO_ISP_EXT_PARAMS v4l2_fourcc('N', 'N', 'E', 'P') /* NXP NEOISP Ext Params */ >>>> +#define V4L2_META_FMT_NEO_ISP_STATS v4l2_fourcc('N', 'N', 'I', 'S') /* NXP NEOISP Statistics */ >>>> +#define V4L2_META_FMT_NEO_ISP_EXT_STATS v4l2_fourcc('N', 'N', 'E', 'S') /* NXP NEOISP Ext Stats */ >>>> + >>>> #ifdef __KERNEL__ >>>> /* >>>> * Line-based metadata formats. Remember to update v4l_fill_fmtdesc() when >>>> -- >>>> 2.52.0 >>>> >>>> >>