From patchwork Sat May 6 12:35:45 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: 13233527 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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id CBE8FC77B7F for ; Sat, 6 May 2023 12:36:23 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 8504E10E291; Sat, 6 May 2023 12:36:05 +0000 (UTC) Received: from madras.collabora.co.uk (madras.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e5ab]) by gabe.freedesktop.org (Postfix) with ESMTPS id 0DA0210E26E for ; Sat, 6 May 2023 12:36:02 +0000 (UTC) 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 474BC660576E; Sat, 6 May 2023 13:36:00 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1683376560; bh=x+LtkF4Bv2WUma1EtR0Bs5ar+LH+tqKcz4m5wWUzmgw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=nML+RGcojureUFcNu5JdR6KbKqF7339kUKWGxZaJolHjsWMY2nyN13d//NLe7VW7e mz7KjpBcPXXYDQMz0rGR4PmdJTJcWZQHaoh/ewni43iBAk64GN1MpRMQ5S4a/qkQ1P VC1lzoVp1oSvc2BqnTp03fiiMA+tnmQiwszU0xbbSEWsW3Xbu0Ki5cAUWEI2iC9KpM ZGVsN/uoatLdJnoCik+Mt/VMYkmLQwYpAD8DEZb1eSAahBINAKVMJi7X19ilgNMi9H rIQ8IRu887OZBmG5b4QLLO44FzsM53CoNhwessmy2dsKb5HVskpxJ+hu7Sgchk3QAL DHLAC+q8uIFbA== From: AngeloGioacchino Del Regno To: chunkuang.hu@kernel.org Subject: [PATCH v3 07/11] drm/mediatek: gamma: Support specifying number of bits per LUT component Date: Sat, 6 May 2023 14:35:45 +0200 Message-Id: <20230506123549.101727-8-angelogioacchino.delregno@collabora.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230506123549.101727-1-angelogioacchino.delregno@collabora.com> References: <20230506123549.101727-1-angelogioacchino.delregno@collabora.com> MIME-Version: 1.0 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: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-mediatek@lists.infradead.org, wenst@chromium.org, matthias.bgg@gmail.com, kernel@collabora.com, linux-arm-kernel@lists.infradead.org, angelogioacchino.delregno@collabora.com Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" 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 Reviewed-by: Jason-JH.Lin --- 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 ed2aa1fb0171..62e1e50d2671 100644 --- a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c +++ b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c @@ -39,6 +39,7 @@ struct mtk_disp_gamma_data { bool has_dither; bool lut_diff; u16 lut_size; + u8 lut_bits; }; /* @@ -84,6 +85,7 @@ 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. */ @@ -92,9 +94,11 @@ 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; } @@ -104,9 +108,9 @@ 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.blue = 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.blue = 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); @@ -114,13 +118,13 @@ 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); @@ -237,10 +241,12 @@ 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, };