From nobody Thu Nov 14 05:26:11 2024 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 88852C001DB for ; Fri, 4 Aug 2023 07:29:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234364AbjHDH3z (ORCPT ); Fri, 4 Aug 2023 03:29:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33736 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234182AbjHDH3K (ORCPT ); Fri, 4 Aug 2023 03:29:10 -0400 Received: from madras.collabora.co.uk (madras.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e5ab]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A6C773ABA for ; Fri, 4 Aug 2023 00:29:09 -0700 (PDT) Received: from IcarusMOD.eternityproject.eu (2-237-20-237.ip236.fastwebnet.it [2.237.20.237]) (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 C8B1466071CB; Fri, 4 Aug 2023 08:29:07 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1691134148; bh=Xw0ZEaJZnUUVzop6jWBNiSdfQOZObWFWliMoyYC7chw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=OsX9MPNAZbTa5XIyyWo/RqHN2N2WUvFMSp6q28yLZBH2WIC4ARPTUAcEBpbYaBz9Q yC7GqT8adcDIUmbS6xVO3sSqbMxU840Sz/Tm3VQ4+8HUZ1jO/oHURdInQLc8Js7sZc xsyEROIAieg1X83xcjHz5MEts5Q1ztdWA7rsXchne/LtAKg/wn1qkytFj03zS6W3mx S8enzxilUOHUfpBuHAFJRyfHrHiWaZkJzQVAXA1xhXnm64dGXdzH8sYudHqdFA2Jcm Z/qYpJ2xlgg+JhnK7LS0LE9esiEYxZnZzzywhUGEAWKoz4WwsMLg3EozbcSWnm4qWR afxt8uV61qqlQ== 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, ehristev@collabora.com, "Jason-JH . Lin" , Alexandre Mergnat Subject: [PATCH v10 13/16] drm/mediatek: gamma: Program gamma LUT type for descending or rising Date: Fri, 4 Aug 2023 09:28:47 +0200 Message-ID: <20230804072850.89365-14-angelogioacchino.delregno@collabora.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230804072850.89365-1-angelogioacchino.delregno@collabora.com> References: <20230804072850.89365-1-angelogioacchino.delregno@collabora.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" All of the SoCs that don't have dithering control in the gamma IP have got a GAMMA_LUT_TYPE bit that tells to the IP if the LUT is "descending" (bit set) or "rising" (bit cleared): make sure to set it correctly after programming the LUT. Signed-off-by: AngeloGioacchino Del Regno Reviewed-by: Jason-JH.Lin Reviewed-by: Alexandre Mergnat Reviewed-by: CK Hu --- drivers/gpu/drm/mediatek/mtk_disp_gamma.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c b/drivers/gpu/drm/me= diatek/mtk_disp_gamma.c index fbff9f97b737..d9a70238d524 100644 --- a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c +++ b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c @@ -22,6 +22,7 @@ #define GAMMA_RELAY_MODE BIT(0) #define GAMMA_LUT_EN BIT(1) #define GAMMA_DITHERING BIT(2) +#define GAMMA_LUT_TYPE BIT(2) #define DISP_GAMMA_SIZE 0x0030 #define DISP_GAMMA_SIZE_HSIZE GENMASK(28, 16) #define DISP_GAMMA_SIZE_VSIZE GENMASK(12, 0) @@ -86,6 +87,17 @@ unsigned int mtk_gamma_get_lut_size(struct device *dev) return LUT_SIZE_DEFAULT; } =20 +static bool mtk_gamma_lut_is_descending(struct drm_color_lut *lut, u32 lut= _size) +{ + u64 first, last; + int last_entry =3D lut_size - 1; + + first =3D lut[0].red + lut[0].green + lut[0].blue; + last =3D lut[last_entry].red + lut[last_entry].green + lut[last_entry].bl= ue; + + return !!(first > last); +} + /* * SoCs supporting 12-bits LUTs are using a new register layout that does * always support (by HW) both 12-bits and 10-bits LUT but, on those, we @@ -175,6 +187,14 @@ void mtk_gamma_set(struct device *dev, struct drm_crtc= _state *state) } } =20 + if (!gamma->data->has_dither) { + /* Descending or Rising LUT */ + if (mtk_gamma_lut_is_descending(lut, gamma->data->lut_size - 1)) + cfg_val |=3D FIELD_PREP(GAMMA_LUT_TYPE, 1); + else + cfg_val &=3D ~GAMMA_LUT_TYPE; + } + /* Enable the gamma table */ cfg_val |=3D FIELD_PREP(GAMMA_LUT_EN, 1); =20 --=20 2.41.0