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GET /api/patches/2218213/?format=api
{ "id": 2218213, "url": "http://patchwork.ozlabs.org/api/patches/2218213/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260331170823.72511-5-soumyajyotisarkar23@gmail.com/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/projects/14/?format=api", "name": "QEMU Development", "link_name": "qemu-devel", "list_id": "qemu-devel.nongnu.org", "list_email": "qemu-devel@nongnu.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260331170823.72511-5-soumyajyotisarkar23@gmail.com>", "list_archive_url": null, "date": "2026-03-31T17:08:22", "name": "[RFC,4/5] usb/hid: handle mouse feature report for wheel/pan multipliers", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "9f36d725c08b81323ab52a0030451aed35094de2", "submitter": { "id": 91019, "url": "http://patchwork.ozlabs.org/api/people/91019/?format=api", "name": "Soumyajyotii Ssarkar", "email": "soumyajyotisarkar23@gmail.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260331170823.72511-5-soumyajyotisarkar23@gmail.com/mbox/", "series": [ { "id": 498231, "url": "http://patchwork.ozlabs.org/api/series/498231/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=498231", "date": "2026-03-31T17:08:18", "name": "Add high-resolution 2D mouse wheel support to USB HID", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/498231/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2218213/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2218213/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20251104 header.b=tBHGtJrA;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; 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helo=mail-pf1-x442.google.com", "X-Spam_score_int": "-17", "X-Spam_score": "-1.8", "X-Spam_bar": "-", "X-Spam_report": "(-1.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1,\n DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1,\n FREEMAIL_ENVFROM_END_DIGIT=0.25, FREEMAIL_FROM=0.001,\n RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001,\n SPF_PASS=-0.001 autolearn=ham autolearn_force=no", "X-Spam_action": "no action", "X-BeenThere": "qemu-devel@nongnu.org", "X-Mailman-Version": "2.1.29", "Precedence": "list", "List-Id": "qemu development <qemu-devel.nongnu.org>", "List-Unsubscribe": "<https://lists.nongnu.org/mailman/options/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>", "List-Archive": "<https://lists.nongnu.org/archive/html/qemu-devel>", "List-Post": "<mailto:qemu-devel@nongnu.org>", "List-Help": "<mailto:qemu-devel-request@nongnu.org?subject=help>", "List-Subscribe": "<https://lists.nongnu.org/mailman/listinfo/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=subscribe>", "Errors-To": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org", "Sender": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org" }, "content": "Implement HID feature report handlers (GET_REPORT/SET_REPORT) for\nreport ID 0x02 to allow guests to configure wheel/pan resolution\nmultipliers.\n\nMultiplier encoding:\n- Bits [1:0]: wheel_multiplier (0=+-1, 1=+-4, 2=+-8, 3=+-16)\n- Bits [3:2]: pan_multiplier (0=+-1, 1=+-4, 2=+-8, 3=+-16)\n\nSupports flexible payload formats (with/without report ID byte).\nAllows Windows guests to dynamically adjust scroll sensitivity without\ndriver installation.\n\nSigned-off-by: Soumyajyotii Ssarkar <soumyajyotisarkar23@gmail.com>\n---\n hw/usb/dev-hid.c | 65 ++++++++++++++++++++++++++++++++++++------\n include/hw/input/hid.h | 2 ++\n 2 files changed, 59 insertions(+), 8 deletions(-)\n\n--\n2.53.0", "diff": "diff --git a/hw/usb/dev-hid.c b/hw/usb/dev-hid.c\nindex 49e23c2319..cdcf2a4a0e 100644\n--- a/hw/usb/dev-hid.c\n+++ b/hw/usb/dev-hid.c\n@@ -672,17 +672,66 @@ static void usb_hid_handle_control(USBDevice *dev, USBPacket *p,\n }\n break;\n case HID_GET_REPORT:\n- if (hs->kind == HID_MOUSE || hs->kind == HID_TABLET) {\n- p->actual_length = hid_pointer_poll(hs, data, length);\n- } else if (hs->kind == HID_KEYBOARD) {\n- p->actual_length = hid_keyboard_poll(hs, data, length);\n+ {\n+ uint8_t mult;\n+ uint8_t report_type = (value >> 8) & 0xFF;\n+ uint8_t report_id = value & 0xFF;\n+\n+ if (report_type == 0x03 && report_id == 0x02 &&\n+ hs->kind == HID_MOUSE) {\n+\n+ if (length < 1) {\n+ goto fail;\n+ }\n+\n+ mult = ((hs->ptr.pan_multiplier & 0x03) << 2) |\n+ (hs->ptr.wheel_multiplier & 0x03);\n+ if (length >= 2) {\n+ data[0] = 0x02;\n+ data[1] = mult;\n+ p->actual_length = 2;\n+ } else {\n+ data[0] = mult;\n+ p->actual_length = 1;\n+ }\n+\n+ } else if (hs->kind == HID_MOUSE || hs->kind == HID_TABLET) {\n+ p->actual_length = hid_pointer_poll(hs, data, length);\n+ } else if (hs->kind == HID_KEYBOARD) {\n+ p->actual_length = hid_keyboard_poll(hs, data, length);\n+ } else {\n+ goto fail;\n+ }\n }\n break;\n case HID_SET_REPORT:\n- if (hs->kind == HID_KEYBOARD) {\n- p->actual_length = hid_keyboard_write(hs, data, length);\n- } else {\n- goto fail;\n+ {\n+ uint8_t mult;\n+ uint8_t report_type = (value >> 8) & 0xFF;\n+ uint8_t report_id = value & 0xFF;\n+\n+ if (report_type == 0x03 && report_id == 0x02 &&\n+ hs->kind == HID_MOUSE) {\n+\n+ if (length < 1) {\n+ goto fail;\n+ }\n+\n+ if (length >= 2 && data[0] == 0x02) {\n+ mult = data[1];\n+ } else {\n+ mult = data[0];\n+ }\n+\n+ hs->ptr.wheel_multiplier = mult & 0x03;\n+ hs->ptr.pan_multiplier = (mult >> 2) & 0x03;\n+ p->actual_length = length;\n+\n+ } else if (hs->kind == HID_KEYBOARD) {\n+ p->actual_length = hid_keyboard_write(hs, data, length);\n+ } else {\n+ goto fail;\n+ }\n }\n break;\n case HID_GET_PROTOCOL:\ndiff --git a/include/hw/input/hid.h b/include/hw/input/hid.h\nindex 1bb1778ee7..1a1941d371 100644\n--- a/include/hw/input/hid.h\n+++ b/include/hw/input/hid.h\n@@ -23,6 +23,8 @@ typedef void (*HIDEventFunc)(HIDState *s);\n typedef struct HIDMouseState {\n HIDPointerEvent queue[QUEUE_LENGTH];\n int mouse_grabbed;\n+ uint8_t wheel_multiplier;\n+ uint8_t pan_multiplier;\n } HIDMouseState;\n\n typedef struct HIDKeyboardState {\n", "prefixes": [ "RFC", "4/5" ] }