From nobody Thu Nov 14 16:58:11 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 79C8DCDB47E for ; Thu, 12 Oct 2023 09:58:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1343540AbjJLJ6s (ORCPT ); Thu, 12 Oct 2023 05:58:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58458 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235637AbjJLJ54 (ORCPT ); Thu, 12 Oct 2023 05:57:56 -0400 Received: from madras.collabora.co.uk (madras.collabora.co.uk [46.235.227.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C74ADD7 for ; Thu, 12 Oct 2023 02:57:53 -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 BE70166071A3; Thu, 12 Oct 2023 10:57:51 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1697104672; bh=OKxW0Teq4t4s0TFxFYrNU/LGHfTxhMGulUaNeRmnmIw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kZvW+8sG6P3xYBl4DtKIBSjG4k02Lm4Opv2Ee5PgT/1+ZTVB2z1RH8dSD6ydoRxH5 5a/HLfoyC/r3OFFnqshOi+uG1aZD3k+JSrzX81rwPCxmPO4qh7ro9dP0nnqRuVHsLx GOn5E7MEKzJjKUpZjAqjq98Ah1N9CcFEw8dO09DIFuSMMvS9KjsbKLM/nIsigL1Icu hJVVcg9IFcpgdFt83RZjGP/fvt6tV/Q+/tv5kjX/v3Fz1hjP1WdPytPsQpBNy6qhbh S4F8Ia4jY7NnWHnrLYb1L8W68iuM1HztZSK0cFLCJnhu5o+PyuF7ThJYZseeJ68iR/ /f2wKIogdxgyQ== 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, nfraprado@collabora.com, "Jason-JH . Lin" , Alexandre Mergnat Subject: [PATCH v11 10/16] drm/mediatek: gamma: Add support for 12-bit LUT Date: Thu, 12 Oct 2023 11:57:30 +0200 Message-ID: <20231012095736.100784-11-angelogioacchino.delregno@collabora.com> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231012095736.100784-1-angelogioacchino.delregno@collabora.com> References: <20231012095736.100784-1-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" 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 calculations and add support for 12-bit gamma lookup tables. While at it, also reorder the variables in mtk_gamma_set_common() and rename `lut_base` to `lut0_base` to improve readability. Reviewed-by: Jason-JH.Lin Reviewed-by: Alexandre Mergnat Signed-off-by: AngeloGioacchino Del Regno Reviewed-by: CK Hu --- drivers/gpu/drm/mediatek/mtk_disp_gamma.c | 83 +++++++++++++++++------ 1 file changed, 64 insertions(+), 19 deletions(-) diff --git a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c b/drivers/gpu/drm/me= diatek/mtk_disp_gamma.c index 911468984ad5..6305cd95e6d4 100644 --- a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c +++ b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c @@ -26,17 +26,26 @@ #define DISP_GAMMA_SIZE_VSIZE GENMASK(12, 0) #define DISP_GAMMA_BANK 0x0100 #define DISP_GAMMA_BANK_BANK GENMASK(1, 0) +#define DISP_GAMMA_BANK_DATA_MODE BIT(2) #define DISP_GAMMA_LUT 0x0700 +#define DISP_GAMMA_LUT1 0x0b00 =20 +/* For 10 bit LUT layout, R/G/B are in the same register */ #define DISP_GAMMA_LUT_10BIT_R GENMASK(29, 20) #define DISP_GAMMA_LUT_10BIT_G GENMASK(19, 10) #define DISP_GAMMA_LUT_10BIT_B GENMASK(9, 0) =20 +/* For 12 bit LUT layout, R/G are in LUT, B is in LUT1 */ +#define DISP_GAMMA_LUT_12BIT_R GENMASK(11, 0) +#define DISP_GAMMA_LUT_12BIT_G GENMASK(23, 12) +#define DISP_GAMMA_LUT_12BIT_B GENMASK(11, 0) + struct mtk_disp_gamma_data { bool has_dither; bool lut_diff; u16 lut_bank_size; u16 lut_size; + u8 lut_bits; }; =20 /* @@ -72,28 +81,48 @@ unsigned int mtk_gamma_get_lut_size(struct device *dev) return 0; } =20 +/* + * 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 + * ignore the support for 10-bits in this driver and always use 12-bits. + * + * Summarizing: + * - SoC HW support 9/10-bits LUT only + * - Old register layout + * - 10-bits LUT supported + * - 9-bits LUT not supported + * - SoC HW support both 10/12bits LUT + * - New register layout + * - 12-bits LUT supported + * - 10-its LUT not supported + */ void mtk_gamma_set(struct device *dev, struct drm_crtc_state *state) { struct mtk_disp_gamma *gamma =3D dev_get_drvdata(dev); - unsigned int i; - struct drm_color_lut *lut; - void __iomem *lut_base; - u32 cfg_val, lbank_val, word; + void __iomem *lut0_base =3D gamma->regs + DISP_GAMMA_LUT; + void __iomem *lut1_base =3D gamma->regs + DISP_GAMMA_LUT1; + u32 cfg_val, data_mode, lbank_val, word[2]; + u8 lut_bits =3D gamma->data->lut_bits; int cur_bank, num_lut_banks; + struct drm_color_lut *lut; + unsigned int i; =20 /* If there's no gamma lut there's nothing to do here. */ if (!state->gamma_lut) return; =20 num_lut_banks =3D gamma->data->lut_size / gamma->data->lut_bank_size; - lut_base =3D gamma->regs + DISP_GAMMA_LUT; lut =3D (struct drm_color_lut *)state->gamma_lut->data; =20 + /* Switch to 12 bits data mode if supported */ + data_mode =3D FIELD_PREP(DISP_GAMMA_BANK_DATA_MODE, !!(lut_bits =3D=3D 12= )); + for (cur_bank =3D 0; cur_bank < num_lut_banks; cur_bank++) { =20 /* Switch gamma bank and set data mode before writing LUT */ if (num_lut_banks > 1) { lbank_val =3D FIELD_PREP(DISP_GAMMA_BANK_BANK, cur_bank); + lbank_val |=3D data_mode; writel(lbank_val, gamma->regs + DISP_GAMMA_BANK); } =20 @@ -101,29 +130,43 @@ void mtk_gamma_set(struct device *dev, struct drm_crt= c_state *state) int n =3D cur_bank * gamma->data->lut_bank_size + i; struct drm_color_lut diff, hwlut; =20 - hwlut.red =3D drm_color_lut_extract(lut[n].red, 10); - hwlut.green =3D drm_color_lut_extract(lut[n].green, 10); - hwlut.blue =3D drm_color_lut_extract(lut[n].blue, 10); + hwlut.red =3D drm_color_lut_extract(lut[n].red, lut_bits); + hwlut.green =3D drm_color_lut_extract(lut[n].green, lut_bits); + hwlut.blue =3D drm_color_lut_extract(lut[n].blue, lut_bits); =20 if (!gamma->data->lut_diff || (i % 2 =3D=3D 0)) { - word =3D FIELD_PREP(DISP_GAMMA_LUT_10BIT_R, hwlut.red); - word |=3D FIELD_PREP(DISP_GAMMA_LUT_10BIT_G, hwlut.green); - word |=3D FIELD_PREP(DISP_GAMMA_LUT_10BIT_B, hwlut.blue); + if (lut_bits =3D=3D 12) { + word[0] =3D FIELD_PREP(DISP_GAMMA_LUT_12BIT_R, hwlut.red); + word[0] |=3D FIELD_PREP(DISP_GAMMA_LUT_12BIT_G, hwlut.green); + word[1] =3D FIELD_PREP(DISP_GAMMA_LUT_12BIT_B, hwlut.blue); + } else { + word[0] =3D FIELD_PREP(DISP_GAMMA_LUT_10BIT_R, hwlut.red); + word[0] |=3D FIELD_PREP(DISP_GAMMA_LUT_10BIT_G, hwlut.green); + word[0] |=3D FIELD_PREP(DISP_GAMMA_LUT_10BIT_B, hwlut.blue); + } } else { diff.red =3D lut[n].red - lut[n - 1].red; - diff.red =3D drm_color_lut_extract(diff.red, 10); + diff.red =3D drm_color_lut_extract(diff.red, lut_bits); =20 diff.green =3D lut[n].green - lut[n - 1].green; - diff.green =3D drm_color_lut_extract(diff.green, 10); + diff.green =3D drm_color_lut_extract(diff.green, lut_bits); =20 diff.blue =3D lut[n].blue - lut[n - 1].blue; - diff.blue =3D drm_color_lut_extract(diff.blue, 10); - - word =3D FIELD_PREP(DISP_GAMMA_LUT_10BIT_R, diff.red); - word |=3D FIELD_PREP(DISP_GAMMA_LUT_10BIT_G, diff.green); - word |=3D FIELD_PREP(DISP_GAMMA_LUT_10BIT_B, diff.blue); + diff.blue =3D drm_color_lut_extract(diff.blue, lut_bits); + + if (lut_bits =3D=3D 12) { + word[0] =3D FIELD_PREP(DISP_GAMMA_LUT_12BIT_R, diff.red); + word[0] |=3D FIELD_PREP(DISP_GAMMA_LUT_12BIT_G, diff.green); + word[1] =3D FIELD_PREP(DISP_GAMMA_LUT_12BIT_B, diff.blue); + } else { + word[0] =3D FIELD_PREP(DISP_GAMMA_LUT_10BIT_R, diff.red); + word[0] |=3D FIELD_PREP(DISP_GAMMA_LUT_10BIT_G, diff.green); + word[0] |=3D FIELD_PREP(DISP_GAMMA_LUT_10BIT_B, diff.blue); + } } - writel(word, lut_base + i * 4); + writel(word[0], lut0_base + i * 4); + if (lut_bits =3D=3D 12) + writel(word[1], lut1_base + i * 4); } } =20 @@ -225,11 +268,13 @@ static void mtk_disp_gamma_remove(struct platform_dev= ice *pdev) static const struct mtk_disp_gamma_data mt8173_gamma_driver_data =3D { .has_dither =3D true, .lut_bank_size =3D 512, + .lut_bits =3D 10, .lut_size =3D 512, }; =20 static const struct mtk_disp_gamma_data mt8183_gamma_driver_data =3D { .lut_bank_size =3D 512, + .lut_bits =3D 10, .lut_diff =3D true, .lut_size =3D 512, }; --=20 2.42.0