From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.0 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,URIBL_BLOCKED, USER_AGENT_SANE_2 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 684F8C433DB for ; Fri, 29 Jan 2021 01:33:12 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 071F960235 for ; Fri, 29 Jan 2021 01:33:11 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 071F960235 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=mediatek.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 65E156E2E3; Fri, 29 Jan 2021 01:33:11 +0000 (UTC) Received: from mailgw02.mediatek.com (unknown [1.203.163.81]) by gabe.freedesktop.org (Postfix) with ESMTP id 8C5F06E2E3 for ; Fri, 29 Jan 2021 01:33:09 +0000 (UTC) X-UUID: 0ae9d5946d4046ae93f30ae54c3f474b-20210129 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Transfer-Encoding:MIME-Version:Content-Type:References:In-Reply-To:Date:CC:To:From:Subject:Message-ID; bh=osPAg0K5Yd7X9cjShUvPGC/GtiMhGLI3vpW3QQq8WXs=; b=SVbp7fctsNo7VFTjJqTqn78oe51H5KAUusyw1m52NIs+N/2N9YjYM/NQqd0jfwnBv67qgdLa1Blkzbt70bLt8z8HRpZjfndb0/kSaIdqHBYRwTFEAk3z/boc52W5XqumjhhYghTm+4Ysx3djUOVCzYS9rEm/N9GT9loVjV+HEH4=; X-UUID: 0ae9d5946d4046ae93f30ae54c3f474b-20210129 Received: from mtkcas32.mediatek.inc [(172.27.4.253)] by mailgw02.mediatek.com (envelope-from ) (mailgw01.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 639592366; Fri, 29 Jan 2021 09:33:07 +0800 Received: from mtkcas11.mediatek.inc (172.21.101.40) by MTKMBS31N2.mediatek.inc (172.27.4.87) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Fri, 29 Jan 2021 09:33:02 +0800 Received: from [172.21.77.4] (172.21.77.4) by mtkcas11.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Fri, 29 Jan 2021 09:33:02 +0800 Message-ID: <1611883982.5226.12.camel@mtksdaap41> Subject: Re: [PATCH v12 6/8] drm/mediatek: enable dither function From: CK Hu To: Hsin-Yi Wang Date: Fri, 29 Jan 2021 09:33:02 +0800 In-Reply-To: <20210128112314.1304160-7-hsinyi@chromium.org> References: <20210128112314.1304160-1-hsinyi@chromium.org> <20210128112314.1304160-7-hsinyi@chromium.org> X-Mailer: Evolution 3.10.4-0ubuntu2 MIME-Version: 1.0 X-TM-SNTS-SMTP: 61173972B03CFC5DDB5831DC8F9D30A79FD4418A4F9F31FD79A0881E77BA28132000:8 X-MTK: N X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , devicetree@vger.kernel.org, David Airlie , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Yongqiang Niu , linux-mediatek@lists.infradead.org, Matthias Brugger , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Hi, Hsin-Yi: On Thu, 2021-01-28 at 19:23 +0800, Hsin-Yi Wang wrote: > From: Yongqiang Niu > > for 5 or 6 bpc panel, we need enable dither function > to improve the display quality > > Signed-off-by: Yongqiang Niu > Signed-off-by: Hsin-Yi Wang > --- > drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 15 +++++++++++++-- > 1 file changed, 13 insertions(+), 2 deletions(-) > > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c > index ac2cb25620357..6c8f246380a74 100644 > --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c > +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c > @@ -53,6 +53,7 @@ > #define DITHER_EN BIT(0) > #define DISP_DITHER_CFG 0x0020 > #define DITHER_RELAY_MODE BIT(0) > +#define DITHER_ENGINE_EN BIT(1) > #define DISP_DITHER_SIZE 0x0030 > > #define LUT_10BIT_MASK 0x03ff > @@ -314,9 +315,19 @@ static void mtk_dither_config(struct device *dev, unsigned int w, > unsigned int bpc, struct cmdq_pkt *cmdq_pkt) > { > struct mtk_ddp_comp_dev *priv = dev_get_drvdata(dev); > + bool enable = (bpc == 5 || bpc == 6); I strongly believe that dither function in dither is identical to the one in gamma and od, and in mtk_dither_set_common(), 'bpc >= MTK_MIN_BPC' is valid, so I believe we need not to limit bpc to 5 or 6. But we should consider the case that bpc is invalid in mtk_dither_set_common(). Invalid case in gamma and od use different way to process. For gamma, dither is default relay mode, so invalid bpc would do nothing in mtk_dither_set_common() and result in relay mode. For od, it set to relay mode first, them invalid bpc would do nothing in mtk_dither_set_common() and result in relay mode. I would like dither, gamma and od to process invalid bpc in the same way. One solution is to set relay mode in mtk_dither_set_common() for invalid bpc. Regards, CK > > - mtk_ddp_write(cmdq_pkt, h << 16 | w, &priv->cmdq_reg, priv->regs, DISP_DITHER_SIZE); > - mtk_ddp_write(cmdq_pkt, DITHER_RELAY_MODE, &priv->cmdq_reg, priv->regs, DISP_DITHER_CFG); > + if (enable) { > + mtk_dither_set_common(priv->regs, &priv->cmdq_reg, bpc, > + DISP_DITHER_CFG, DITHER_ENGINE_EN, > + cmdq_pkt); > + } else { > + mtk_ddp_write(cmdq_pkt, DITHER_RELAY_MODE, &priv->cmdq_reg, > + priv->regs, DISP_DITHER_CFG); > + } > + > + mtk_ddp_write(cmdq_pkt, h << 16 | w, &priv->cmdq_reg, priv->regs, > + DISP_DITHER_SIZE); > } > > static void mtk_dither_start(struct device *dev) _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel