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[129.46.96.20]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-34db491fae1sm750926eec.24.2026.09.30.11.30.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 30 Sep 2026 11:30:40 -0700 (PDT) From: Deepa Guthyappa Madivalara Date: Wed, 30 Sep 2026 11:30:24 -0700 Subject: [PATCH v8 1/5] media: v4l2-core: add new control type V4L2_CTRL_TYPE_S8 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260930-enc_roi_enable-v8-1-2c908f30e963@oss.qualcomm.com> References: <20260930-enc_roi_enable-v8-0-2c908f30e963@oss.qualcomm.com> In-Reply-To: <20260930-enc_roi_enable-v8-0-2c908f30e963@oss.qualcomm.com> To: Mauro Carvalho Chehab , Vikash Garodia , Dikshita Agarwal , Abhinav Kumar , Bryan O'Donoghue Cc: linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, Deepa Guthyappa Madivalara , kernel test robot , Hans Verkuil X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1790793030; l=8019; i=deepa.madivalara@oss.qualcomm.com; s=20250814; h=from:subject:message-id; bh=DoDb5/3SowuSRtiQ/IVrXUJDL9Gx7dvh6M5JkE/jj7k=; b=3o9bVvVxNV8XyKcVyaw5Z6ULOXYLBMOnoDGUjKXcEq4Qq6F0hYv++atAjGTxPljCh5/vPXdwu +IdgMCIUU+HBfRBf0NG2khoF0+u/twZsxF5kU8ITfbj0V9sjX5rcV9k X-Developer-Key: i=deepa.madivalara@oss.qualcomm.com; a=ed25519; pk=MOEXgyokievn+bgpHdS6Ixh/KQYyS90z2mqIbQ822FQ= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTMwMDA3NSBTYWx0ZWRfX0Vhr9ABuL7Ej JP6AOvddYufp12nALgtRxNv5pc8RrV9Uks7eIJapKt2bi0zAfpWztqfXEkYapKLKcwVkC00dz7G QIvoTcRG9z7jq9FGSGOC0n7tICXBTFAbs2oSmuDrIh7JkYP/LX+SHtTU0jg0o0RmOk78V9jyIFJ tj4xzxgxhXpMkXPQDpEJdStceXb//RW+/B8NovGTsqMT3m4HMJSQvivAVz2C/D9ElIRO9f5IpZD KhZPd6Y/CvXc0pxeu/b+MW1PubE9IQvZsTp17xoUkyjTXfmQBvoAC8GjJnb2ZT4yzwMTr0FGRwZ FJXRCtgYZPoyiDENlbvX0sTvdc/A5mR0U3598fXcps252cuHLlVGicG8gJQVUalsdSdzLyGNy+Z NQXy9vR+JglOtiJGN7YPy8dgZx5eB4gTbIPZooBvDiO8kCYBQgqnoZqm3r2INbU+yOhpiFE0dRn gpe9jHWd4uN3gc5713A== X-Proofpoint-GUID: RDxdeQkcxrmfcQMly-Bpywv7DDTuKU45 X-Proofpoint-Spam-Info: AW1haW4tMjYwOTMwMDA3NSBTYWx0ZWRfX1KlyWQNMjvMh oxadz+3aNn8AtlVqRqUBCuED46Q3SRzx5Lhr+ZYwEmLFfKOtwh7FrvpbPYmCNQVN73hK2kemQAF mDlQzoGpl6CbyYMl8EbdzmN6QuEJYm0= X-Authority-Analysis: v=2.4 cv=S51MU4sP c=1 sm=1 tr=0 ts=6abd5553 cx=c_pps a=cFYjgdjTJScbgFmBucgdfQ==:117 a=ouPCqIW2jiPt+lZRy3xVPw==:17 a=IkcTkHD0fZMA:10 a=VdqzKS8jKosA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=yx91gb_oNiZeI1HMLzn7:22 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=ZvH2QzoBumBvrUatZloA:9 a=QEXdDO2ut3YA:10 a=scEy_gLbYbu1JhEsrz4S:22 X-Proofpoint-ORIG-GUID: RDxdeQkcxrmfcQMly-Bpywv7DDTuKU45 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-09-30_04,2026-09-21_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 phishscore=0 priorityscore=1501 clxscore=1015 impostorscore=0 lowpriorityscore=0 spamscore=0 adultscore=0 bulkscore=0 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2609040000 definitions=main-2609300075 Introduce V4L2_CTRL_TYPE_S8 (enum value 0x0103) as a new control type for signed 8-bit values. Add necessary support in v4l2_ext_control, v4l2_ctrl_ptr and handling in v4l2-ctrls-core, v4l2-ctrls-api. Reviewed-by: Hans Verkuil Signed-off-by: Deepa Guthyappa Madivalara --- .../userspace-api/media/v4l/videodev2.h.rst.exceptions | 1 + .../userspace-api/media/v4l/vidioc-g-ext-ctrls.rst | 4 ++++ .../userspace-api/media/v4l/vidioc-queryctrl.rst | 6 ++++++ drivers/media/v4l2-core/v4l2-ctrls-api.c | 1 + drivers/media/v4l2-core/v4l2-ctrls-core.c | 16 ++++++++++++++++ include/media/v4l2-ctrls.h | 2 ++ include/uapi/linux/videodev2.h | 2 ++ 7 files changed, 32 insertions(+) diff --git a/Documentation/userspace-api/media/v4l/videodev2.h.rst.exceptions b/Documentation/userspace-api/media/v4l/videodev2.h.rst.exceptions index 6182b4e2d2ee002c0d3562e1cc3bc2fd9c4286d6..b036ed3ec2f0744175cad1cbc4e73fe828e0c955 100644 --- a/Documentation/userspace-api/media/v4l/videodev2.h.rst.exceptions +++ b/Documentation/userspace-api/media/v4l/videodev2.h.rst.exceptions @@ -141,6 +141,7 @@ replace symbol V4L2_CTRL_TYPE_STRING :c:type:`V4L.v4l2_ctrl_type` replace symbol V4L2_CTRL_TYPE_U16 :c:type:`V4L.v4l2_ctrl_type` replace symbol V4L2_CTRL_TYPE_U32 :c:type:`V4L.v4l2_ctrl_type` replace symbol V4L2_CTRL_TYPE_U8 :c:type:`V4L.v4l2_ctrl_type` +replace symbol V4L2_CTRL_TYPE_S8 :c:type:`V4L.v4l2_ctrl_type` replace symbol V4L2_CTRL_TYPE_MPEG2_SEQUENCE :c:type:`V4L.v4l2_ctrl_type` replace symbol V4L2_CTRL_TYPE_MPEG2_PICTURE :c:type:`V4L.v4l2_ctrl_type` replace symbol V4L2_CTRL_TYPE_MPEG2_QUANTISATION :c:type:`V4L.v4l2_ctrl_type` diff --git a/Documentation/userspace-api/media/v4l/vidioc-g-ext-ctrls.rst b/Documentation/userspace-api/media/v4l/vidioc-g-ext-ctrls.rst index d78328152b7552f8f0d30a9e2f7c104bfd4b70d3..fe5f8992389c32d8f35f432229ef2f734002644e 100644 --- a/Documentation/userspace-api/media/v4l/vidioc-g-ext-ctrls.rst +++ b/Documentation/userspace-api/media/v4l/vidioc-g-ext-ctrls.rst @@ -188,6 +188,10 @@ still cause this situation. - ``p_u32`` - A pointer to a matrix control of unsigned 32-bit values. Valid if this control is of type ``V4L2_CTRL_TYPE_U32``. + * - __s8 * + - ``p_s8`` + - A pointer to a matrix control of signed 8-bit values. Valid if + this control is of type ``V4L2_CTRL_TYPE_S8``. * - __s32 * - ``p_s32`` - A pointer to a matrix control of signed 32-bit values. Valid if diff --git a/Documentation/userspace-api/media/v4l/vidioc-queryctrl.rst b/Documentation/userspace-api/media/v4l/vidioc-queryctrl.rst index 82c8b52e771ce9301491b3f752e501a8fe7e2434..57e1652ae72e0324742142446acf32a16b94941c 100644 --- a/Documentation/userspace-api/media/v4l/vidioc-queryctrl.rst +++ b/Documentation/userspace-api/media/v4l/vidioc-queryctrl.rst @@ -425,6 +425,12 @@ See also the examples in :ref:`control`. - any - An unsigned 32-bit valued control ranging from minimum to maximum inclusive. The step value indicates the increment between values. + * - ``V4L2_CTRL_TYPE_S8`` + - any + - any + - any + - A signed 8-bit valued control ranging from minimum to maximum + inclusive. The step value indicates the increment between values. * - ``V4L2_CTRL_TYPE_MPEG2_QUANTISATION`` - n/a - n/a diff --git a/drivers/media/v4l2-core/v4l2-ctrls-api.c b/drivers/media/v4l2-core/v4l2-ctrls-api.c index 93d8d4012d0f4fef004e417d0aee2ae44b1b30bd..7d41cfd7378baaa929d4da0266c45f731bb54285 100644 --- a/drivers/media/v4l2-core/v4l2-ctrls-api.c +++ b/drivers/media/v4l2-core/v4l2-ctrls-api.c @@ -980,6 +980,7 @@ int __v4l2_ctrl_modify_range(struct v4l2_ctrl *ctrl, case V4L2_CTRL_TYPE_U8: case V4L2_CTRL_TYPE_U16: case V4L2_CTRL_TYPE_U32: + case V4L2_CTRL_TYPE_S8: if (ctrl->is_array) return -EINVAL; ret = check_range(ctrl->type, min, max, step, def); diff --git a/drivers/media/v4l2-core/v4l2-ctrls-core.c b/drivers/media/v4l2-core/v4l2-ctrls-core.c index 661a3a25da5220d2e824f71e68871181533e6cd8..c5df0e0a54f81c73975f427957b7c99fd421d5ad 100644 --- a/drivers/media/v4l2-core/v4l2-ctrls-core.c +++ b/drivers/media/v4l2-core/v4l2-ctrls-core.c @@ -297,6 +297,9 @@ static void __v4l2_ctrl_type_op_init(const struct v4l2_ctrl *ctrl, u32 from_idx, memset(ptr.p_u32 + from_idx, 0, elems * sizeof(u32)); } break; + case V4L2_CTRL_TYPE_S8: + memset(ptr.p_s8 + from_idx, (u8)value, elems); + break; default: for (i = from_idx; i < tot_elems; i++) { switch (which) { @@ -377,6 +380,9 @@ void v4l2_ctrl_type_op_log(const struct v4l2_ctrl *ctrl) case V4L2_CTRL_TYPE_U32: pr_cont("%u", (unsigned)*ptr.p_u32); break; + case V4L2_CTRL_TYPE_S8: + pr_cont("%d", *ptr.p_s8); + break; case V4L2_CTRL_TYPE_AREA: pr_cont("%ux%u", ptr.p_area->width, ptr.p_area->height); break; @@ -1442,6 +1448,8 @@ static int std_validate_elem(const struct v4l2_ctrl *ctrl, u32 idx, return ROUND_TO_RANGE(ptr.p_u16[idx], u16, ctrl); case V4L2_CTRL_TYPE_U32: return ROUND_TO_RANGE(ptr.p_u32[idx], u32, ctrl); + case V4L2_CTRL_TYPE_S8: + return ROUND_TO_RANGE(ptr.p_s8[idx], u8, ctrl); case V4L2_CTRL_TYPE_BOOLEAN: ptr.p_s32[idx] = !!ptr.p_s32[idx]; @@ -1501,6 +1509,10 @@ int v4l2_ctrl_type_op_validate(const struct v4l2_ctrl *ctrl, if (ctrl->maximum == 0xffffffff && ctrl->minimum == 0 && ctrl->step == 1) return 0; break; + case V4L2_CTRL_TYPE_S8: + if (ctrl->maximum == S8_MAX && ctrl->minimum == S8_MIN && ctrl->step == 1) + return 0; + break; case V4L2_CTRL_TYPE_BUTTON: case V4L2_CTRL_TYPE_CTRL_CLASS: @@ -1732,6 +1744,7 @@ int check_range(enum v4l2_ctrl_type type, case V4L2_CTRL_TYPE_U32: case V4L2_CTRL_TYPE_INTEGER: case V4L2_CTRL_TYPE_INTEGER64: + case V4L2_CTRL_TYPE_S8: if (step == 0 || min > max || def < min || def > max) return -ERANGE; return 0; @@ -2037,6 +2050,9 @@ static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl, case V4L2_CTRL_TYPE_U32: elem_size = sizeof(u32); break; + case V4L2_CTRL_TYPE_S8: + elem_size = sizeof(s8); + break; case V4L2_CTRL_TYPE_MPEG2_SEQUENCE: elem_size = sizeof(struct v4l2_ctrl_mpeg2_sequence); break; diff --git a/include/media/v4l2-ctrls.h b/include/media/v4l2-ctrls.h index cec9217d97ac698cd447574f5d079dd913a9ef6f..cbda866197d894657b571ee5d57b4956818b7ee0 100644 --- a/include/media/v4l2-ctrls.h +++ b/include/media/v4l2-ctrls.h @@ -30,6 +30,7 @@ struct video_device; * @p_s32: Pointer to a 32-bit signed value. * @p_s64: Pointer to a 64-bit signed value. * @p_u8: Pointer to a 8-bit unsigned value. + * @p_s8: Pointer to a 8-bit signed value. * @p_u16: Pointer to a 16-bit unsigned value. * @p_u32: Pointer to a 32-bit unsigned value. * @p_char: Pointer to a string. @@ -61,6 +62,7 @@ struct video_device; * @p_const: Pointer to a constant compound value. */ union v4l2_ctrl_ptr { + s8 *p_s8; s32 *p_s32; s64 *p_s64; u8 *p_u8; diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h index 5373dba640fae3d19247ab1c74ba336e05dc0fe0..ac588d0093df9cc35c11d0b9d41d052d5e800925 100644 --- a/include/uapi/linux/videodev2.h +++ b/include/uapi/linux/videodev2.h @@ -1884,6 +1884,7 @@ struct v4l2_ext_control { __s64 value64; char __user *string; __u8 __user *p_u8; + __s8 __user *p_s8; __u16 __user *p_u16; __u32 __user *p_u32; __s32 __user *p_s32; @@ -1961,6 +1962,7 @@ enum v4l2_ctrl_type { V4L2_CTRL_TYPE_U8 = 0x0100, V4L2_CTRL_TYPE_U16 = 0x0101, V4L2_CTRL_TYPE_U32 = 0x0102, + V4L2_CTRL_TYPE_S8 = 0x0103, V4L2_CTRL_TYPE_AREA = 0x0106, V4L2_CTRL_TYPE_RECT = 0x0107, -- 2.34.1