From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Sun, 03 May 2026 10:45:26 +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 1wJSS7-000U8o-28 for lore@lore.pengutronix.de; Sun, 03 May 2026 10:45:26 +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 1wJSS4-0004YN-IF for lore@pengutronix.de; Sun, 03 May 2026 10:45:26 +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:References:In-Reply-To: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:List-Owner; bh=TCj3T5XOHeWOwo0nfCIV4v/KANa9bmH+6YiPHvNytsQ=; b=tNOVWygKiKw2Ya2QlgYS/IR94j guDnGcNbhbkgKhD8aeVn62A3QwXsrrnq1z38PFuHvRNOxxbPGXHb5LWV0eyhfhAMJRswZG1M+xccM bL+cwqe8/XHcW8NM2xLt3fmqhbi/RieZgTuMjsNATR+L2Ew/qxfisc6XZG//b0nJzVRYU2i4z4eGT LnWWHMW6X4LiU2LKM93BFfxlJowM38xvCLAhFEQ0asACrUTatMhBgne8pmqM2JyjmsukdOnoBZZUs 5WezTqGZ5L5YEPIk2Sx9w0mT4l6JLktqnPtvV4xoiwv/Cngnp/92G1uQV4Xvkj20+tre8mcCRMvRB kitnrlZQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1wJSRS-0000000Af6v-2tQQ; Sun, 03 May 2026 08:44:46 +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 1wJSRM-0000000Aere-0gls for barebox@lists.infradead.org; Sun, 03 May 2026 08:44:41 +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 1wJSRK-0003oP-HV; Sun, 03 May 2026 10:44:38 +0200 From: Ahmad Fatoum To: barebox@lists.infradead.org Cc: Ahmad Fatoum Date: Sun, 3 May 2026 10:33:17 +0200 Message-ID: <20260503084430.2765761-16-a.fatoum@barebox.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260503084430.2765761-1-a.fatoum@barebox.org> References: <20260503084430.2765761-1-a.fatoum@barebox.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260503_014440_274033_8C790091 X-CRM114-Status: UNSURE ( 9.69 ) X-CRM114-Notice: Please train this message. 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=-5.0 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 15/20] fbconsole: support ESC[0J and ESC[1J partial screen clear 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) The ESC[J handler always called cls() which clears the entire screen, regardless of the parameter. Per ECMA-48, the parameter selects the region to clear: - 0 (or omitted): from cursor to end of screen - 1: from start of screen to cursor - 2: entire screen Add a clear_chars() helper that clears a partial specified region by drawing spaces (respecting the current background color), and parse the ESC[J parameter to dispatch to the appropriate clearing mode. Link: https://terminalguide.namepad.de/seq/csi_cj-0/ Link: https://terminalguide.namepad.de/seq/csi_cj-1/ Link: https://terminalguide.namepad.de/seq/csi_cj-2/ Signed-off-by: Ahmad Fatoum --- drivers/video/fbconsole.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/drivers/video/fbconsole.c b/drivers/video/fbconsole.c index c67e3817ca13..6cca3faa9615 100644 --- a/drivers/video/fbconsole.c +++ b/drivers/video/fbconsole.c @@ -641,7 +641,20 @@ static bool fbc_parse_csi(struct fbc_priv *priv) } break; case 'J': - cls(priv); + pos = simple_strtoul(priv->csi, &end, 10); + toggle_cursor_visibility(priv); + switch (pos) { + case 0: /* clear from cursor to end of screen */ + clear_chars(priv, priv->cur.x, priv->cur.y, + priv->cols - 1, priv->rows - 1); + break; + case 1: /* clear from start of screen to cursor */ + clear_chars(priv, 0, 0, priv->cur.x, priv->cur.y); + break; + case 2: /* clear entire screen */ + cls(priv); + break; + } toggle_cursor_visibility(priv); return true; case 'H': -- 2.47.3