From nobody Tue Sep 16 02:28:49 2025 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 CDC58C63797 for ; Mon, 9 Jan 2023 14:44:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233796AbjAIOod (ORCPT ); Mon, 9 Jan 2023 09:44:33 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33556 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233825AbjAIOoJ (ORCPT ); Mon, 9 Jan 2023 09:44:09 -0500 Received: from fanzine2.igalia.com (fanzine2.igalia.com [213.97.179.56]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C0A8C1DF3C for ; Mon, 9 Jan 2023 06:44:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=igalia.com; s=20170329; h=Content-Transfer-Encoding:Content-Type:MIME-Version:References: In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=jMSYSfJzahufrlrBXYv6MHo37VWug9MHt0sn3JWK32A=; b=NbUuCutEZIA1CwE6LAAMFEoZvo V7T66kPVPBJ2c3VViNxi5izJ06I1fqOjNTWi2MBZwDPZmueA1qRGMuLAHnLBAt0V1+VHqHxQTFX5e LlFeTCoV8QNyCDpt+BiNLAvBuvU/SxRiopzVBJ1/DWQI4DSZ+CF8HUi1YrbQp97+JVETnc3ubjd7/ icdu0RAUCs17eNqdV/RLG1bkQfhW32Nic/ywJBIm0I7WSt80PHDDijgrJqNDgugjQ7aHadxjD1McV jG14ZDLm1FzBWDrhTwiYxxImFNqw0SCqa8GDaG7hOaeb1FERtmI1mVG/QUDEaEAy4sXj0eWFbjF/O OOMruEcg==; Received: from [41.74.137.107] (helo=killbill.home) by fanzine2.igalia.com with esmtpsa (Cipher TLS1.3:ECDHE_X25519__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim) id 1pEtNS-003TyM-LS; Mon, 09 Jan 2023 15:43:54 +0100 From: Melissa Wen To: maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com, daniel@ffwll.ch Cc: Joshua Ashton , alex.hung@amd.com, nicholas.kazlauskas@amd.com, sungjoon.kim@amd.com, seanpaul@chromium.org, bhawanpreet.lakha@amd.com, Shashank Sharma , ville.syrjala@linux.intel.com, kernel-dev@igalia.com, laurent.pinchart+renesas@ideasonboard.com, Melissa Wen , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: [RFC PATCH v2 03/18] drm/drm_color_mgmt: add 3D LUT props to DRM color mgmt Date: Mon, 9 Jan 2023 13:38:31 -0100 Message-Id: <20230109143846.1966301-4-mwen@igalia.com> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20230109143846.1966301-1-mwen@igalia.com> References: <20230109143846.1966301-1-mwen@igalia.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add 3D LUT for gammar correction using a 3D lookup table. The position in the color correction pipeline where 3D LUT is applied depends on hw design, being after CTM or gamma. If just after CTM, a shaper lut must be set to shape the content for a non-linear space. That details should be handled by the driver according to its color capabilities. -- v3: - refactor CRTC 3D LUT API to use Alex Hung proposal for planes Signed-off-by: Melissa Wen --- drivers/gpu/drm/drm_atomic_state_helper.c | 3 +++ drivers/gpu/drm/drm_atomic_uapi.c | 14 ++++++++++++++ drivers/gpu/drm/drm_color_mgmt.c | 19 +++++++++++++++++++ drivers/gpu/drm/drm_fb_helper.c | 2 ++ drivers/gpu/drm/drm_mode_config.c | 7 +++++++ include/drm/drm_crtc.h | 20 +++++++++++++++++++- include/drm/drm_mode_config.h | 13 +++++++++++++ include/drm/drm_mode_object.h | 2 +- 8 files changed, 78 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/drm_atomic_state_helper.c b/drivers/gpu/drm/dr= m_atomic_state_helper.c index 4bc860d6cf75..6e70f08e2f44 100644 --- a/drivers/gpu/drm/drm_atomic_state_helper.c +++ b/drivers/gpu/drm/drm_atomic_state_helper.c @@ -143,6 +143,8 @@ void __drm_atomic_helper_crtc_duplicate_state(struct dr= m_crtc *crtc, drm_property_blob_get(state->ctm); if (state->shaper_lut) drm_property_blob_get(state->shaper_lut); + if (state->lut3d) + drm_property_blob_get(state->lut3d); if (state->gamma_lut) drm_property_blob_get(state->gamma_lut); =20 @@ -218,6 +220,7 @@ void __drm_atomic_helper_crtc_destroy_state(struct drm_= crtc_state *state) drm_property_blob_put(state->degamma_lut); drm_property_blob_put(state->ctm); drm_property_blob_put(state->shaper_lut); + drm_property_blob_put(state->lut3d); drm_property_blob_put(state->gamma_lut); } EXPORT_SYMBOL(__drm_atomic_helper_crtc_destroy_state); diff --git a/drivers/gpu/drm/drm_atomic_uapi.c b/drivers/gpu/drm/drm_atomic= _uapi.c index 5339350c858d..29297badf028 100644 --- a/drivers/gpu/drm/drm_atomic_uapi.c +++ b/drivers/gpu/drm/drm_atomic_uapi.c @@ -438,6 +438,16 @@ static int drm_atomic_crtc_set_property(struct drm_crt= c *crtc, &replaced); state->color_mgmt_changed |=3D replaced; return ret; + } else if (property =3D=3D config->lut3d_property) { + ret =3D drm_atomic_replace_property_blob_from_id(dev, + &state->lut3d, + val, + -1, sizeof(struct drm_color_lut), + &replaced); + state->color_mgmt_changed |=3D replaced; + return ret; + } else if (property =3D=3D config->lut3d_mode_property) { + state->lut3d_mode =3D val; } else if (property =3D=3D config->gamma_lut_property) { ret =3D drm_atomic_replace_property_blob_from_id(dev, &state->gamma_lut, @@ -491,6 +501,10 @@ drm_atomic_crtc_get_property(struct drm_crtc *crtc, *val =3D (state->ctm) ? state->ctm->base.id : 0; else if (property =3D=3D config->shaper_lut_property) *val =3D (state->shaper_lut) ? state->shaper_lut->base.id : 0; + else if (property =3D=3D config->lut3d_property) + *val =3D (state->lut3d) ? state->lut3d->base.id : 0; + else if (property =3D=3D config->lut3d_mode_property) + *val =3D state->lut3d_mode; else if (property =3D=3D config->gamma_lut_property) *val =3D (state->gamma_lut) ? state->gamma_lut->base.id : 0; else if (property =3D=3D config->prop_out_fence_ptr) diff --git a/drivers/gpu/drm/drm_color_mgmt.c b/drivers/gpu/drm/drm_color_m= gmt.c index cf6a998b4298..f92633b3b67e 100644 --- a/drivers/gpu/drm/drm_color_mgmt.c +++ b/drivers/gpu/drm/drm_color_mgmt.c @@ -87,6 +87,25 @@ * publish the largest size, and sub-sample smaller sized LUTs * appropriately. * + * =E2=80=9CLUT3D=E2=80=9D: + * Blob property to set the 3D LUT mapping pixel data after the color + * transformation matrix and before gamma 1D lut correction. The + * data is interpreted as an array of &struct drm_color_lut elements. + * Hardware might choose not to use the full precision of the LUT + * elements. + * + * Setting this to NULL (blob property value set to 0) means a the output + * color is identical to the input color. This is generally the driver + * boot-up state too. Drivers can access this blob through + * &drm_crtc_state.gamma_lut. + * + * =E2=80=9CLUT3D_MODE=E2=80=9D: + * Enum property to give the mode of the 3D lookup table to be set on the + * LUT3D property. A mode specifies size, stride, bit depth and color + * format and depends on the underlying hardware). If drivers support + * multiple 3D LUT modes, they should be declared in a array of + * drm_color_lut3d_mode and they will be advertised as an enum. + * * =E2=80=9CGAMMA_LUT=E2=80=9D: * Blob property to set the gamma lookup table (LUT) mapping pixel data * after the transformation matrix to data sent to the connector. The diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helpe= r.c index f8b4611cbb4a..6130c44c79f6 100644 --- a/drivers/gpu/drm/drm_fb_helper.c +++ b/drivers/gpu/drm/drm_fb_helper.c @@ -1131,6 +1131,8 @@ static int setcmap_atomic(struct fb_cmap *cmap, struc= t fb_info *info) replaced |=3D drm_property_replace_blob(&crtc_state->ctm, NULL); replaced |=3D drm_property_replace_blob(&crtc_state->shaper_lut, NULL); + replaced |=3D drm_property_replace_blob(&crtc_state->lut3d, + NULL); replaced |=3D drm_property_replace_blob(&crtc_state->gamma_lut, gamma_lut); =20 diff --git a/drivers/gpu/drm/drm_mode_config.c b/drivers/gpu/drm/drm_mode_c= onfig.c index 6468cecc7081..5c37d84cdabf 100644 --- a/drivers/gpu/drm/drm_mode_config.c +++ b/drivers/gpu/drm/drm_mode_config.c @@ -368,6 +368,13 @@ static int drm_mode_create_standard_properties(struct = drm_device *dev) return -ENOMEM; dev->mode_config.shaper_lut_size_property =3D prop; =20 + prop =3D drm_property_create(dev, + DRM_MODE_PROP_BLOB, + "LUT3D", 0); + if (!prop) + return -ENOMEM; + dev->mode_config.lut3d_property =3D prop; + prop =3D drm_property_create(dev, DRM_MODE_PROP_BLOB, "GAMMA_LUT", 0); diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h index 7f289e0153aa..805a50c36a70 100644 --- a/include/drm/drm_crtc.h +++ b/include/drm/drm_crtc.h @@ -152,7 +152,7 @@ struct drm_crtc_state { bool zpos_changed : 1; /** * @color_mgmt_changed: Color management properties have changed - * (@shaper_lut, @gamma_lut, @degamma_lut or @ctm). Used by + * (@shaper_lut, @lut3d, @gamma_lut, @degamma_lut or @ctm). Used by * the atomic helpers and drivers to steer the atomic commit control * flow. */ @@ -289,6 +289,24 @@ struct drm_crtc_state { */ struct drm_property_blob *shaper_lut; =20 + /** + * @lut3d: + * + * 3D Lookup table for converting pixel data. Position where it takes + * place depends on hw design, after @ctm or @gamma_lut. See + * drm_crtc_enable_color_mgmt(). The blob (if not NULL) is an array of + * &struct drm_color_lut. + */ + struct drm_property_blob *lut3d; + + /** + * @lut3d_mode: + * This is a blob_id and exposes the platform capabilities wrt + * various 3dlut. This also helps user select a 3dlut mode amongst + * the supported ones. + */ + u32 lut3d_mode; + /** * @target_vblank: * diff --git a/include/drm/drm_mode_config.h b/include/drm/drm_mode_config.h index c174d3a7c951..6cb96f403de2 100644 --- a/include/drm/drm_mode_config.h +++ b/include/drm/drm_mode_config.h @@ -812,6 +812,19 @@ struct drm_mode_config { */ struct drm_property *shaper_lut_size_property; =20 + /** + * @lut3d_property: Optional CRTC property to set the 3D LUT used to + * convert colors; before or after gamma conversion depends on hw + * design. A shaper LUT can be used to delinearize content before apply + * 3D LUT correction. + */ + struct drm_property *lut3d_property; + /** + * @lut3d_mode_property: Optional CRTC property to describe 3D LUT modes + * supported by the driver. + */ + struct drm_property *lut3d_mode_property; + /** * @gamma_lut_property: Optional CRTC property to set the LUT used to * convert the colors, after the CTM matrix, to the gamma space of the diff --git a/include/drm/drm_mode_object.h b/include/drm/drm_mode_object.h index 5e75b51936e6..d39ee21f26db 100644 --- a/include/drm/drm_mode_object.h +++ b/include/drm/drm_mode_object.h @@ -60,7 +60,7 @@ struct drm_mode_object { void (*free_cb)(struct kref *kref); }; =20 -#define DRM_OBJECT_MAX_PROPERTY 26 +#define DRM_OBJECT_MAX_PROPERTY 28 /** * struct drm_object_properties - property tracking for &drm_mode_object */ --=20 2.35.1