From patchwork Tue May 2 08:16:46 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: AngeloGioacchino Del Regno X-Patchwork-Id: 13228588 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 3476AC77B73 for ; Tue, 2 May 2023 08:18:20 +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:References:In-Reply-To: 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: List-Owner; bh=0aDAi1O/rRRGY9bWRrcWagafL/J1Z2bygWrSeo2suGo=; b=YojivO3BgflK5e wvZNlwGq+gAJnZz455XqmCMwnJnUdu6s543DeYFSvzjAzHLBXhCDF3pNPR5jLsgeSnjLzZCGgNMjD zjkIZ/L3jWmVN7IOXQ/hUx8NTTgo3kKdAAND6frXDo+qftUCGqL6Nh0Jrlbkher4iqQuVwsjfnsnU D9ZEow0QVjO/Y5upC8G5AA3IwXa/qa6K3vn5c+JcGEpoNP85GWQ5UU0xdXB/TRKFuIIedr8J2xQPx teBaWv5UHy4n2IhcyxG1+Ihk6J2bCTgVqdv4j/s2jBvLhG4YItCDm++ij6krD78ffmCZ3mpqNyEez V51IQhIoM42PVkT8S6Ug==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1ptlCL-000aE7-0e; Tue, 02 May 2023 08:17:21 +0000 Received: from madras.collabora.co.uk ([46.235.227.172]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1ptlC6-000ZyG-0G; Tue, 02 May 2023 08:17:08 +0000 Received: from IcarusMOD.eternityproject.eu (unknown [IPv6:2001:b07:2ed:14ed:c5f8:7372:f042:90a2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: kholk11) by madras.collabora.co.uk (Postfix) with ESMTPSA id 3469D660563E; Tue, 2 May 2023 09:17:02 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1683015423; bh=6OqcIXte6mM2Jl9jofDaAkBT5elMjD6hHVuFTYg/khc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hJWOJ7a7YiBMr5oPw5OAPYZB6fRDngz1az2OA0BuXjhu3zIKyxiqFApl8bmCWEQma GIqOH0XkLEccFdTmnPbEqDlCK15uObf5UstqGuVTvGuoerFIhFy7LrPtv/ZQRlnRB7 boYMxsthSGQ3UmcPBJbOnFUo2eAGGNbyxjQdXiEWXXri5ApQI2y/7hfMUw3SvH5Cqm R7y+lNrsGRRaNsQH1R4DQfubrlz+yfkkUHCc/OC3TFTMhyYtc+2MfVv2FWr7ZlEKYy bjlMPxQUqkPhLUcgv9stDbdXZiWvqXH6DWz1usxb4yxueMIdhKYCA1RvBE8X1z2a3Y jEI5OHSh8Sf4g== From: AngeloGioacchino Del Regno To: chunkuang.hu@kernel.org Cc: p.zabel@pengutronix.de, airlied@gmail.com, daniel@ffwll.ch, matthias.bgg@gmail.com, angelogioacchino.delregno@collabora.com, dri-devel@lists.freedesktop.org, linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, wenst@chromium.org, kernel@collabora.com Subject: [PATCH 07/11] drm/mediatek: gamma: Support specifying number of bits per LUT component Date: Tue, 2 May 2023 10:16:46 +0200 Message-Id: <20230502081650.25947-8-angelogioacchino.delregno@collabora.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230502081650.25947-1-angelogioacchino.delregno@collabora.com> References: <20230502081650.25947-1-angelogioacchino.delregno@collabora.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230502_011706_269617_244C44D0 X-CRM114-Status: GOOD ( 14.23 ) 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 New SoCs, like MT8195, not only may support bigger lookup tables, but have got a different register layout to support bigger precision: support specifying the number of `lut_bits` for each SoC and use it in mtk_gamma_set_common() to perform the right calculation. Signed-off-by: AngeloGioacchino Del Regno --- drivers/gpu/drm/mediatek/mtk_disp_gamma.c | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c index ef0243034663..320a7e36d9c5 100644 --- a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c +++ b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c @@ -38,6 +38,7 @@ struct mtk_disp_gamma_data { bool has_dither; bool lut_diff; u16 lut_size; + u8 lut_bits; }; /* @@ -83,6 +84,7 @@ void mtk_gamma_set_common(struct device *dev, void __iomem *regs, struct drm_crt void __iomem *lut_base; bool lut_diff; u16 lut_size; + u8 lut_bits; u32 cfg_val, word; /* If there's no gamma lut there's nothing to do here. */ @@ -91,9 +93,11 @@ void mtk_gamma_set_common(struct device *dev, void __iomem *regs, struct drm_crt if (gamma && gamma->data) { lut_diff = gamma->data->lut_diff; + lut_bits = gamma->data->lut_bits; lut_size = gamma->data->lut_size; } else { lut_diff = false; + lut_bits = LUT_BITS_DEFAULT; lut_size = LUT_SIZE_DEFAULT; } @@ -103,9 +107,9 @@ void mtk_gamma_set_common(struct device *dev, void __iomem *regs, struct drm_crt for (i = 0; i < lut_size; i++) { struct drm_color_lut diff, hwlut; - hwlut.red = drm_color_lut_extract(lut[i].red, LUT_BITS_DEFAULT); - hwlut.green = drm_color_lut_extract(lut[i].green, LUT_BITS_DEFAULT); - hwlut.red = drm_color_lut_extract(lut[i].blue, LUT_BITS_DEFAULT); + hwlut.red = drm_color_lut_extract(lut[i].red, lut_bits); + hwlut.green = drm_color_lut_extract(lut[i].green, lut_bits); + hwlut.red = drm_color_lut_extract(lut[i].blue, lut_bits); if (!lut_diff || (i % 2 == 0)) { word = FIELD_PREP(DISP_GAMMA_LUT_10BIT_R, hwlut.red); @@ -113,13 +117,13 @@ void mtk_gamma_set_common(struct device *dev, void __iomem *regs, struct drm_crt word |= FIELD_PREP(DISP_GAMMA_LUT_10BIT_B, hwlut.blue); } else { diff.red = lut[i].red - lut[i - 1].red; - diff.red = drm_color_lut_extract(diff.red, LUT_BITS_DEFAULT); + diff.red = drm_color_lut_extract(diff.red, lut_bits); diff.green = lut[i].green - lut[i - 1].green; - diff.green = drm_color_lut_extract(diff.green, LUT_BITS_DEFAULT); + diff.green = drm_color_lut_extract(diff.green, lut_bits); diff.blue = lut[i].blue - lut[i - 1].blue; - diff.blue = drm_color_lut_extract(diff.blue, LUT_BITS_DEFAULT); + diff.blue = drm_color_lut_extract(diff.blue, lut_bits); word = FIELD_PREP(DISP_GAMMA_LUT_10BIT_R, diff.red); word |= FIELD_PREP(DISP_GAMMA_LUT_10BIT_G, diff.green); @@ -236,10 +240,12 @@ static int mtk_disp_gamma_remove(struct platform_device *pdev) static const struct mtk_disp_gamma_data mt8173_gamma_driver_data = { .has_dither = true, + .lut_bits = 10, .lut_size = 512, }; static const struct mtk_disp_gamma_data mt8183_gamma_driver_data = { + .lut_bits = 10, .lut_diff = true, .lut_size = 512, };