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Sun, 22 Feb 2026 19:47:41 -0800 (PST) Date: Sun, 22 Feb 2026 19:47:38 -0800 From: Dmitry Torokhov To: Tzung-Bi Shih Cc: Fabio Baltieri , Benson Leung , Guenter Roeck , Simon Glass , linux-input@vger.kernel.org, chrome-platform@lists.linux.dev, linux-kernel@vger.kernel.org Subject: Re: [PATCH 2/7] Input: cros_ec_keyb - add function key support Message-ID: References: <20260222003717.471977-1-dmitry.torokhov@gmail.com> <20260222003717.471977-2-dmitry.torokhov@gmail.com> Precedence: bulk X-Mailing-List: chrome-platform@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Sun, Feb 22, 2026 at 06:46:53PM +0800, Tzung-Bi Shih wrote: > On Sat, Feb 21, 2026 at 04:37:10PM -0800, Dmitry Torokhov wrote: > > From: Fabio Baltieri > > > > Add support for handling an Fn button and sending separate keycodes for > > a subset of keys in the matrix defined in the upper half of the keymap. > > > > Signed-off-by: Fabio Baltieri > > Reviewed-by: Simon Glass > > Link: https://patch.msgid.link/20260211173421.1206478-3-fabiobaltieri@chromium.org > > Signed-off-by: Dmitry Torokhov > > The patch looks good to me, just a few minor nits below. I don't insist on > these being fixed for this patch to be merged, > > Reviewed-by: Tzung-Bi Shih Thanks Tzung-Bi. > > > +static void cros_ec_keyb_process_key_fn_map(struct cros_ec_keyb *ckdev, > > + int row, int col, bool state) > > +{ > > + struct input_dev *idev = ckdev->idev; > > + const unsigned short *keycodes = idev->keycode; > > + unsigned int pos, fn_pos; > > + unsigned int code, fn_code; > > Nit: does declaring `code` and `fn_code` as unsigned short make more sense? > Or they can be declared in the same line. I do not think making temporary variables unsigned short changes anything, so I will leave it as is. > > > + > > + pos = MATRIX_SCAN_CODE(row, col, ckdev->row_shift); > > + code = keycodes[pos]; > > + > > + if (code == KEY_FN) { > > + ckdev->fn_active = state; > > + if (state) { > > + ckdev->fn_combo_active = false; > > + } else if (!ckdev->fn_combo_active) { > > + /* > > + * Send both Fn press and release events if nothing > > + * else has been pressed together with Fn. > > + */ > > + cros_ec_emit_fn_key(idev, pos); > > + } > > + return; > > + } > > + > > + fn_pos = MATRIX_SCAN_CODE(row + ckdev->rows, col, ckdev->row_shift); > > + fn_code = keycodes[fn_pos]; > > + > > + if (state) { > > + if (ckdev->fn_active) { > > + ckdev->fn_combo_active = true; > > + if (!fn_code) > > + return; /* Discard if no Fn mapping exists */ > > + > > + code = fn_code; > > + pos = fn_pos; > > Nit: assigning `pos` before `code` makes it neater. > > > + } > > + } else { > > + /* > > + * If the Fn-remapped code is currently pressed, release it. > > + * Otherwise, release the standard code (if it was pressed). > > + */ > > + if (fn_code && test_bit(fn_code, idev->key)) { > > + code = fn_code; > > + pos = fn_pos; > > Nit: same here. Yep, I'll update before applying. Thanks. -- Dmitry