From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Fri, 01 May 2026 11:08:41 +0200 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by lore.white.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1wIjrV-000oui-0u for lore@lore.pengutronix.de; Fri, 01 May 2026 11:08:41 +0200 Received: from bombadil.infradead.org ([2607:7c80:54:3::133]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1wIjrU-0004Ga-N2 for lore@pengutronix.de; Fri, 01 May 2026 11:08:41 +0200 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=UPEIEdB4l3PWL4vGAwCTimO6VXIefv3bSWZxts/jGD0=; b=avePxYi7wQyzcSOJH7hMNqLDe3 bN9lAZx0zLgAlab0m5ij0/mwn7i5fUHlNFBZsJPIapKw1stPm/kkXwrLLcQLv4um9zz7vv7TthT74 /i6Q5cyF53PSA/teFzRE9sTdMV4jLoVKprmxakWhebv5S4Ta/A+C+HBqbn8Hpz5RuU5l5sYj/kMgR OqHSrHcsQf4u6b4fXqmGKGEqJH25P1bq/ApQfzAWVOfZeNl/OXBgTS2NB95NcmdlbND7Bnj4Yi9r+ REXh1+Su8DoDUkBYwy+oYCsaASTYYY8hydtxlNE1sXVyKV1jC73nboZiOmX7c07H7wd40LEPMZ5B7 hWGXyD0g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1wIjqw-00000006X7h-2eF9; Fri, 01 May 2026 09:08:06 +0000 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1wIjqu-00000006X7M-1EHw for barebox@lists.infradead.org; Fri, 01 May 2026 09:08:05 +0000 Received: from ptz.office.stw.pengutronix.de ([2a0a:edc0:0:900:1d::77] helo=geraet.lan) by metis.whiteo.stw.pengutronix.de with esmtp (Exim 4.92) (envelope-from ) id 1wIjqs-0003mu-8v; Fri, 01 May 2026 11:08:02 +0200 From: Ahmad Fatoum To: barebox@lists.infradead.org Cc: Ahmad Fatoum Date: Fri, 1 May 2026 11:08:00 +0200 Message-ID: <20260501090801.1041468-1-a.fatoum@barebox.org> X-Mailer: git-send-email 2.47.3 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260501_020804_333670_B3FB8A5F X-CRM114-Status: GOOD ( 11.26 ) X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "barebox" X-SA-Exim-Connect-IP: 2607:7c80:54:3::133 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.whiteo.stw.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-4.7 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.2 Subject: [PATCH] serial: efi-stdio: implement DEC save/restore cursor X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.whiteo.stw.pengutronix.de) term_getsize() employs the DEC save/restore cursor control sequences (\e7 and \e8) in its determination of the terminal's size. efi_process_escape() did not handle them and instead expected that all \e are directly followed by a [. Implement support for \e7 and \e8 and have the function silently skip any other non-bracket \eX escape. Signed-off-by: Ahmad Fatoum --- drivers/serial/efi-stdio.c | 26 ++++++++++++++++++++------ 1 file changed, 20 insertions(+), 6 deletions(-) diff --git a/drivers/serial/efi-stdio.c b/drivers/serial/efi-stdio.c index b474fe635d15..1e7f5a4a3973 100644 --- a/drivers/serial/efi-stdio.c +++ b/drivers/serial/efi-stdio.c @@ -39,6 +39,10 @@ struct efi_console_priv { const char **mode_names; int *mode_num; unsigned int var_mode; + + /* saved cursor position for \e7/\e8 */ + unsigned long saved_row; + unsigned long saved_col; }; static inline struct efi_console_priv *to_efi(struct console_device *cdev) @@ -274,16 +278,26 @@ static int efi_process_square_bracket(struct efi_console_priv *priv, const char static int efi_process_escape(struct efi_console_priv *priv, const char *inp) { - char c; - - c = *inp; - + /* skip ESC, so inp points at the char after it */ inp++; - if (*inp == '[') + switch (*inp) { + case '[': return efi_process_square_bracket(priv, inp) + 1; + case '7': + /* DEC save cursor position */ + priv->saved_row = priv->out->mode->cursor_row; + priv->saved_col = priv->out->mode->cursor_column; + break; + case '8': + /* DEC restore cursor position */ + priv->out->set_cursor_position(priv->out, + priv->saved_col, priv->saved_row); + break; + } - return 1; + /* We have consumed ESC + one character following it */ + return 2; } static void efi_console_add_char(struct efi_console_priv *priv, int c) -- 2.47.3