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[35.236.236.5]) by smtp.gmail.com with ESMTPSA id ada2fe7eead31-4b9baa9aefcsm1592770137.12.2025.02.03.03.55.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 03 Feb 2025 03:55:59 -0800 (PST) From: Ricardo Ribalda Date: Mon, 03 Feb 2025 11:55:45 +0000 Subject: [PATCH v17 09/17] media: uvcvideo: Factor out clamping from uvc_ctrl_set 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: quoted-printable Message-Id: <20250203-uvc-roi-v17-9-5900a9fed613@chromium.org> References: <20250203-uvc-roi-v17-0-5900a9fed613@chromium.org> In-Reply-To: <20250203-uvc-roi-v17-0-5900a9fed613@chromium.org> To: Laurent Pinchart , Mauro Carvalho Chehab , Hans de Goede , Sakari Ailus , Hans Verkuil Cc: Yunke Cao , linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, Ricardo Ribalda , Yunke Cao X-Mailer: b4 0.13.0 Move the logic to a separated function. Do not expect any change. This is a preparation for supporting compound controls. Reviewed-by: Yunke Cao Reviewed-by: Hans de Goede Tested-by: Yunke Cao Signed-off-by: Ricardo Ribalda --- drivers/media/usb/uvc/uvc_ctrl.c | 86 +++++++++++++++++++++---------------= ---- 1 file changed, 46 insertions(+), 40 deletions(-) diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_c= trl.c index a0156b79ab48..b6fd06bd1006 100644 --- a/drivers/media/usb/uvc/uvc_ctrl.c +++ b/drivers/media/usb/uvc/uvc_ctrl.c @@ -2053,30 +2053,17 @@ int uvc_ctrl_get(struct uvc_video_chain *chain, u32= which, return -EINVAL; } =20 -int uvc_ctrl_set(struct uvc_fh *handle, - struct v4l2_ext_control *xctrl) +static int uvc_ctrl_clamp(struct uvc_video_chain *chain, + struct uvc_control *ctrl, + struct uvc_control_mapping *mapping, + s32 *value_in_out) { - struct uvc_video_chain *chain =3D handle->chain; - struct uvc_control *ctrl; - struct uvc_control_mapping *mapping; - s32 value; + s32 value =3D *value_in_out; u32 step; s32 min; s32 max; int ret; =20 - lockdep_assert_held(&chain->ctrl_mutex); - - if (__uvc_query_v4l2_class(chain, xctrl->id, 0) >=3D 0) - return -EACCES; - - ctrl =3D uvc_find_control(chain, xctrl->id, &mapping); - if (ctrl =3D=3D NULL) - return -EINVAL; - if (!(ctrl->info.flags & UVC_CTRL_FLAG_SET_CUR)) - return -EACCES; - - /* Clamp out of range values. */ switch (mapping->v4l2_type) { case V4L2_CTRL_TYPE_INTEGER: if (!ctrl->cached) { @@ -2094,14 +2081,13 @@ int uvc_ctrl_set(struct uvc_fh *handle, if (step =3D=3D 0) step =3D 1; =20 - xctrl->value =3D min + DIV_ROUND_CLOSEST((u32)(xctrl->value - min), - step) * step; + value =3D min + DIV_ROUND_CLOSEST((u32)(value - min), step) * step; if (mapping->data_type =3D=3D UVC_CTRL_DATA_TYPE_SIGNED) - xctrl->value =3D clamp(xctrl->value, min, max); + value =3D clamp(value, min, max); else - xctrl->value =3D clamp_t(u32, xctrl->value, min, max); - value =3D xctrl->value; - break; + value =3D clamp_t(u32, value, min, max); + *value_in_out =3D value; + return 0; =20 case V4L2_CTRL_TYPE_BITMASK: if (!ctrl->cached) { @@ -2110,21 +2096,20 @@ int uvc_ctrl_set(struct uvc_fh *handle, return ret; } =20 - xctrl->value &=3D uvc_get_ctrl_bitmap(ctrl, mapping); - value =3D xctrl->value; - break; + value &=3D uvc_get_ctrl_bitmap(ctrl, mapping); + *value_in_out =3D value; + return 0; =20 case V4L2_CTRL_TYPE_BOOLEAN: - xctrl->value =3D clamp(xctrl->value, 0, 1); - value =3D xctrl->value; - break; + *value_in_out =3D clamp(value, 0, 1); + return 0; =20 case V4L2_CTRL_TYPE_MENU: - if (xctrl->value < (ffs(mapping->menu_mask) - 1) || - xctrl->value > (fls(mapping->menu_mask) - 1)) + if (value < (ffs(mapping->menu_mask) - 1) || + value > (fls(mapping->menu_mask) - 1)) return -ERANGE; =20 - if (!test_bit(xctrl->value, &mapping->menu_mask)) + if (!test_bit(value, &mapping->menu_mask)) return -EINVAL; =20 /* @@ -2132,8 +2117,7 @@ int uvc_ctrl_set(struct uvc_fh *handle, * UVC controls that support it. */ if (mapping->data_type =3D=3D UVC_CTRL_DATA_TYPE_BITMASK) { - int val =3D uvc_mapping_get_menu_value(mapping, - xctrl->value); + int val =3D uvc_mapping_get_menu_value(mapping, value); if (!ctrl->cached) { ret =3D uvc_ctrl_populate_cache(chain, ctrl); if (ret < 0) @@ -2143,14 +2127,36 @@ int uvc_ctrl_set(struct uvc_fh *handle, if (!(uvc_get_ctrl_bitmap(ctrl, mapping) & val)) return -EINVAL; } - value =3D xctrl->value; - break; + return 0; =20 default: - value =3D xctrl->value; - break; + return 0; } =20 + return 0; +} + +int uvc_ctrl_set(struct uvc_fh *handle, struct v4l2_ext_control *xctrl) +{ + struct uvc_video_chain *chain =3D handle->chain; + struct uvc_control_mapping *mapping; + struct uvc_control *ctrl; + int ret; + + lockdep_assert_held(&chain->ctrl_mutex); + + if (__uvc_query_v4l2_class(chain, xctrl->id, 0) >=3D 0) + return -EACCES; + + ctrl =3D uvc_find_control(chain, xctrl->id, &mapping); + if (!ctrl) + return -EINVAL; + if (!(ctrl->info.flags & UVC_CTRL_FLAG_SET_CUR)) + return -EACCES; + + ret =3D uvc_ctrl_clamp(chain, ctrl, mapping, &xctrl->value); + if (ret) + return ret; /* * If the mapping doesn't span the whole UVC control, the current value * needs to be loaded from the device to perform the read-modify-write @@ -2169,7 +2175,7 @@ int uvc_ctrl_set(struct uvc_fh *handle, ctrl->info.size); } =20 - uvc_mapping_set_s32(mapping, value, + uvc_mapping_set_s32(mapping, xctrl->value, uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT)); =20 ctrl->dirty =3D 1; --=20 2.48.1.362.g079036d154-goog