From patchwork Thu Sep 21 20:03:07 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lucas Stach X-Patchwork-Id: 13394471 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 25F8BE7D0A2 for ; Thu, 21 Sep 2023 20:03:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:Cc :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=GNFa3WydcbRVTzTjJJZKEu9pxsf0O3So7ihOxZU+pO8=; b=IpnHbGMavXsI3+ jHR722h6NlL7aDPCXHyBVTIgid7T9gKA0t7ZsIxrbg7gPXrHZ8K9XXsJkzC0+eoWbE++9q05VejMc hWYbPjX0WS/xmKKr8IeIbFCnp3mMkWMuZhL9u6n3iOFHzyv1ozPag5QOn2SB0c9BxCX7Zr5bM+Y0N 9XmnRuOz+IlFFma2vxPxEq9TSWC9m4nO10tW+tbdyjiB9o9WRZRTIPt1RUHgSwF+40tN/XEgKdeD5 eQV4QGWBQwP6rNl8oOKGTXrq9wc6Xxx1mPO9nD+7+cBWN5htY8kGzYkydF2j6OacILZQD9rXXUABK qfQsSN8O6gfd+USHj4Gg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qjPtP-0072GL-2K; Thu, 21 Sep 2023 20:03:19 +0000 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qjPtM-0072E7-2k for linux-arm-kernel@lists.infradead.org; Thu, 21 Sep 2023 20:03:18 +0000 Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1qjPtI-0000P1-Pe; Thu, 21 Sep 2023 22:03:12 +0200 Received: from [2a0a:edc0:0:1101:1d::28] (helo=dude02.red.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtp (Exim 4.94.2) (envelope-from ) id 1qjPtI-00804q-71; Thu, 21 Sep 2023 22:03:12 +0200 From: Lucas Stach To: Marek Vasut , Liu Ying Cc: Pengutronix Kernel Team , NXP Linux Team , dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, patchwork-lst@pengutronix.de Subject: [PATCH v2 1/6] drm: lcdif: improve burst size configuration comment Date: Thu, 21 Sep 2023 22:03:07 +0200 Message-Id: <20230921200312.3989073-1-l.stach@pengutronix.de> X-Mailer: git-send-email 2.39.2 MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: l.stach@pengutronix.de X-SA-Exim-Scanned: No (on metis.whiteo.stw.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-arm-kernel@lists.infradead.org X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230921_130316_890615_47CD3215 X-CRM114-Status: GOOD ( 12.08 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The comment regarding AXI bust size configuration is a bit hard to read. Improve the wording somewhat. Signed-off-by: Lucas Stach Reviewed-by: Marco Felsch Reviewed-by: Marek Vasut --- v2: Some more rewording. --- drivers/gpu/drm/mxsfb/lcdif_kms.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/mxsfb/lcdif_kms.c b/drivers/gpu/drm/mxsfb/lcdif_kms.c index 2541d2de4e45..07e343e01f3e 100644 --- a/drivers/gpu/drm/mxsfb/lcdif_kms.c +++ b/drivers/gpu/drm/mxsfb/lcdif_kms.c @@ -329,12 +329,12 @@ static void lcdif_set_mode(struct lcdif_drm_private *lcdif, u32 bus_flags) lcdif->base + LCDC_V8_CTRLDESCL0_1); /* - * Undocumented P_SIZE and T_SIZE register but those written in the - * downstream kernel those registers control the AXI burst size. As of - * now there are two known values: + * The P_SIZE and T_SIZE bitfields are only documented in the + * downstream driver. Those bitfields control the AXI burst size. + * As of now there are two known values: * 1 - 128Byte * 2 - 256Byte - * Downstream set it to 256B burst size to improve the memory + * Downstream sets this to 256B burst size to improve the memory access * efficiency so set it here too. */ ctrl = CTRLDESCL0_3_P_SIZE(2) | CTRLDESCL0_3_T_SIZE(2) |