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[2001:1c00:c32:7800:5bfa:a036:83f0:f9ec]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-aa516396f6asm449690966b.158.2024.11.25.07.50.14 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 25 Nov 2024 07:50:14 -0800 (PST) Message-ID: <9be8f912-13b3-4b7d-9705-8ffa3a27d205@redhat.com> Date: Mon, 25 Nov 2024 16:50:14 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v15 05/19] media: uvcvideo: Handle uvc menu translation inside uvc_get_le_value To: Ricardo Ribalda , Laurent Pinchart , Mauro Carvalho Chehab , Ricardo Ribalda , Sakari Ailus , Hans Verkuil Cc: Yunke Cao , linux-media@vger.kernel.org, linux-kernel@vger.kernel.org References: <20241114-uvc-roi-v15-0-64cfeb56b6f8@chromium.org> <20241114-uvc-roi-v15-5-64cfeb56b6f8@chromium.org> Content-Language: en-US, nl From: Hans de Goede In-Reply-To: <20241114-uvc-roi-v15-5-64cfeb56b6f8@chromium.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Hi, On 14-Nov-24 8:10 PM, Ricardo Ribalda wrote: > map->get() gets a value from an uvc_control in "UVC format" and converts > it to a value that can be consumed by v4l2. > > Instead of using a special get function for V4L2_CTRL_TYPE_MENU, we > were converting from uvc_get_le_value in two different places. > > Move the conversion to uvc_get_le_value(). > > Signed-off-by: Ricardo Ribalda Thanks, patch looks good to me: Reviewed-by: Hans de Goede Regards, Hans > --- > drivers/media/usb/uvc/uvc_ctrl.c | 77 +++++++++++++++++----------------------- > 1 file changed, 32 insertions(+), 45 deletions(-) > > diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c > index bab9fdac98e6..77f7058ec966 100644 > --- a/drivers/media/usb/uvc/uvc_ctrl.c > +++ b/drivers/media/usb/uvc/uvc_ctrl.c > @@ -862,6 +862,25 @@ static inline void uvc_clear_bit(u8 *data, int bit) > data[bit >> 3] &= ~(1 << (bit & 7)); > } > > +static s32 uvc_menu_to_v4l2_menu(struct uvc_control_mapping *mapping, s32 val) > +{ > + unsigned int i; > + > + for (i = 0; BIT(i) <= mapping->menu_mask; ++i) { > + u32 menu_value; > + > + if (!test_bit(i, &mapping->menu_mask)) > + continue; > + > + menu_value = uvc_mapping_get_menu_value(mapping, i); > + > + if (menu_value == val) > + return i; > + } > + > + return val; > +} > + > /* > * Extract the bit string specified by mapping->offset and mapping->size > * from the little-endian data stored at 'data' and return the result as > @@ -896,6 +915,16 @@ static s32 uvc_get_le_value(struct uvc_control_mapping *mapping, > if (mapping->data_type == UVC_CTRL_DATA_TYPE_SIGNED) > value |= -(value & (1 << (mapping->size - 1))); > > + /* If it is a menu, convert from uvc to v4l2. */ > + if (mapping->v4l2_type != V4L2_CTRL_TYPE_MENU) > + return value; > + > + switch (query) { > + case UVC_GET_CUR: > + case UVC_GET_DEF: > + return uvc_menu_to_v4l2_menu(mapping, value); > + } > + > return value; > } > > @@ -1060,32 +1089,6 @@ static int uvc_ctrl_populate_cache(struct uvc_video_chain *chain, > return 0; > } > > -static s32 __uvc_ctrl_get_value(struct uvc_control_mapping *mapping, > - const u8 *data) > -{ > - s32 value = mapping->get(mapping, UVC_GET_CUR, data); > - > - if (mapping->v4l2_type == V4L2_CTRL_TYPE_MENU) { > - unsigned int i; > - > - for (i = 0; BIT(i) <= mapping->menu_mask; ++i) { > - u32 menu_value; > - > - if (!test_bit(i, &mapping->menu_mask)) > - continue; > - > - menu_value = uvc_mapping_get_menu_value(mapping, i); > - > - if (menu_value == value) { > - value = i; > - break; > - } > - } > - } > - > - return value; > -} > - > static int __uvc_ctrl_load_cur(struct uvc_video_chain *chain, > struct uvc_control *ctrl) > { > @@ -1136,8 +1139,8 @@ static int __uvc_ctrl_get(struct uvc_video_chain *chain, > if (ret < 0) > return ret; > > - *value = __uvc_ctrl_get_value(mapping, > - uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT)); > + *value = mapping->get(mapping, UVC_GET_CUR, > + uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT)); > > return 0; > } > @@ -1287,7 +1290,6 @@ static int __uvc_query_v4l2_ctrl(struct uvc_video_chain *chain, > { > struct uvc_control_mapping *master_map = NULL; > struct uvc_control *master_ctrl = NULL; > - unsigned int i; > > memset(v4l2_ctrl, 0, sizeof(*v4l2_ctrl)); > v4l2_ctrl->id = mapping->id; > @@ -1330,21 +1332,6 @@ static int __uvc_query_v4l2_ctrl(struct uvc_video_chain *chain, > v4l2_ctrl->minimum = ffs(mapping->menu_mask) - 1; > v4l2_ctrl->maximum = fls(mapping->menu_mask) - 1; > v4l2_ctrl->step = 1; > - > - for (i = 0; BIT(i) <= mapping->menu_mask; ++i) { > - u32 menu_value; > - > - if (!test_bit(i, &mapping->menu_mask)) > - continue; > - > - menu_value = uvc_mapping_get_menu_value(mapping, i); > - > - if (menu_value == v4l2_ctrl->default_value) { > - v4l2_ctrl->default_value = i; > - break; > - } > - } > - > return 0; > > case V4L2_CTRL_TYPE_BOOLEAN: > @@ -1592,7 +1579,7 @@ void uvc_ctrl_status_event(struct uvc_video_chain *chain, > ctrl->handle = NULL; > > list_for_each_entry(mapping, &ctrl->info.mappings, list) { > - s32 value = __uvc_ctrl_get_value(mapping, data); > + s32 value = mapping->get(mapping, UVC_GET_CUR, data); > > /* > * handle may be NULL here if the device sends auto-update >