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[80.197.57.18]) by smtp.gmail.com with ESMTPSA id z8sm3805970lfg.18.2019.09.30.03.18.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 30 Sep 2019 03:18:47 -0700 (PDT) From: Ricardo Ribalda Delgado To: Philipp Zabel , Hans Verkuil , Jacopo Mondi , linux-media@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Ricardo Ribalda Delgado , Ricardo Ribalda Delgado Subject: [PATCH v8 3/8] media: add V4L2_CTRL_TYPE_AREA control type Date: Mon, 30 Sep 2019 12:18:36 +0200 Message-Id: <20190930101841.19630-4-ribalda@kernel.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20190930101841.19630-1-ribalda@kernel.org> References: <20190930101841.19630-1-ribalda@kernel.org> MIME-Version: 1.0 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org From: Ricardo Ribalda Delgado This type contains the width and the height of a rectangular area. Reviewed-by: Jacopo Mondi Signed-off-by: Ricardo Ribalda Delgado --- drivers/media/v4l2-core/v4l2-ctrls.c | 21 ++++++++++++++ include/media/v4l2-ctrls.h | 42 ++++++++++++++++++++++++++++ include/uapi/linux/videodev2.h | 6 ++++ 3 files changed, 69 insertions(+) diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c index 219d8aeefa20..b9a46f536406 100644 --- a/drivers/media/v4l2-core/v4l2-ctrls.c +++ b/drivers/media/v4l2-core/v4l2-ctrls.c @@ -1678,6 +1678,7 @@ static int std_validate_compound(const struct v4l2_ctrl *ctrl, u32 idx, struct v4l2_ctrl_mpeg2_slice_params *p_mpeg2_slice_params; struct v4l2_ctrl_vp8_frame_header *p_vp8_frame_header; void *p = ptr.p + idx * ctrl->elem_size; + struct v4l2_area *area; switch ((u32)ctrl->type) { case V4L2_CTRL_TYPE_MPEG2_SLICE_PARAMS: @@ -1753,6 +1754,11 @@ static int std_validate_compound(const struct v4l2_ctrl *ctrl, u32 idx, zero_padding(p_vp8_frame_header->entropy_header); zero_padding(p_vp8_frame_header->coder_state); break; + case V4L2_CTRL_TYPE_AREA: + area = p; + if (!area->width || !area->height) + return -EINVAL; + break; default: return -EINVAL; } @@ -2427,6 +2433,9 @@ static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl, case V4L2_CTRL_TYPE_VP8_FRAME_HEADER: elem_size = sizeof(struct v4l2_ctrl_vp8_frame_header); break; + case V4L2_CTRL_TYPE_AREA: + elem_size = sizeof(struct v4l2_area); + break; default: if (type < V4L2_CTRL_COMPOUND_TYPES) elem_size = sizeof(s32); @@ -4116,6 +4125,18 @@ int __v4l2_ctrl_s_ctrl_string(struct v4l2_ctrl *ctrl, const char *s) } EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl_string); +int __v4l2_ctrl_s_ctrl_area(struct v4l2_ctrl *ctrl, + const struct v4l2_area *area) +{ + lockdep_assert_held(ctrl->handler->lock); + + /* It's a driver bug if this happens. */ + WARN_ON(ctrl->type != V4L2_CTRL_TYPE_AREA); + memcpy(ctrl->p_new.p_area, area, sizeof(*area)); + return set_ctrl(NULL, ctrl, 0); +} +EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl_area); + void v4l2_ctrl_request_complete(struct media_request *req, struct v4l2_ctrl_handler *main_hdl) { diff --git a/include/media/v4l2-ctrls.h b/include/media/v4l2-ctrls.h index 90a8ee48c2f3..c42f164e2c9e 100644 --- a/include/media/v4l2-ctrls.h +++ b/include/media/v4l2-ctrls.h @@ -50,6 +50,7 @@ struct poll_table_struct; * @p_h264_slice_params: Pointer to a struct v4l2_ctrl_h264_slice_params. * @p_h264_decode_params: Pointer to a struct v4l2_ctrl_h264_decode_params. * @p_vp8_frame_header: Pointer to a VP8 frame header structure. + * @p_area: Pointer to an area. * @p: Pointer to a compound value. */ union v4l2_ctrl_ptr { @@ -68,6 +69,7 @@ union v4l2_ctrl_ptr { struct v4l2_ctrl_h264_slice_params *p_h264_slice_params; struct v4l2_ctrl_h264_decode_params *p_h264_decode_params; struct v4l2_ctrl_vp8_frame_header *p_vp8_frame_header; + struct v4l2_area *p_area; void *p; }; @@ -1086,6 +1088,46 @@ static inline int v4l2_ctrl_s_ctrl_string(struct v4l2_ctrl *ctrl, const char *s) return rval; } +/** + * __v4l2_ctrl_s_ctrl_area() - Unlocked variant of v4l2_ctrl_s_ctrl_area(). + * + * @ctrl: The control. + * @area: The new area. + * + * This sets the control's new area safely by going through the control + * framework. This function assumes the control's handler is already locked, + * allowing it to be used from within the &v4l2_ctrl_ops functions. + * + * This function is for area type controls only. + */ +int __v4l2_ctrl_s_ctrl_area(struct v4l2_ctrl *ctrl, + const struct v4l2_area *area); + +/** + * v4l2_ctrl_s_ctrl_area() - Helper function to set a control's area value + * from within a driver. + * + * @ctrl: The control. + * @s: The new area. + * + * This sets the control's new area safely by going through the control + * framework. This function will lock the control's handler, so it cannot be + * used from within the &v4l2_ctrl_ops functions. + * + * This function is for area type controls only. + */ +static inline int v4l2_ctrl_s_ctrl_area(struct v4l2_ctrl *ctrl, + const struct v4l2_area *area) +{ + int rval; + + v4l2_ctrl_lock(ctrl); + rval = __v4l2_ctrl_s_ctrl_area(ctrl, area); + v4l2_ctrl_unlock(ctrl); + + return rval; +} + /* Internal helper functions that deal with control events. */ extern const struct v4l2_subscribed_event_ops v4l2_ctrl_sub_ev_ops; diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h index 530638dffd93..b3c0961b62a0 100644 --- a/include/uapi/linux/videodev2.h +++ b/include/uapi/linux/videodev2.h @@ -422,6 +422,11 @@ struct v4l2_fract { __u32 denominator; }; +struct v4l2_area { + __u32 width; + __u32 height; +}; + /** * struct v4l2_capability - Describes V4L2 device caps returned by VIDIOC_QUERYCAP * @@ -1720,6 +1725,7 @@ enum v4l2_ctrl_type { V4L2_CTRL_TYPE_U8 = 0x0100, V4L2_CTRL_TYPE_U16 = 0x0101, V4L2_CTRL_TYPE_U32 = 0x0102, + V4L2_CTRL_TYPE_AREA = 0x0106, }; /* Used in the VIDIOC_QUERYCTRL ioctl for querying controls */