From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 19224C433E0 for ; Tue, 22 Dec 2020 08:01:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D128022D57 for ; Tue, 22 Dec 2020 08:01:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726032AbgLVIBe (ORCPT ); Tue, 22 Dec 2020 03:01:34 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36488 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725300AbgLVIBe (ORCPT ); Tue, 22 Dec 2020 03:01:34 -0500 Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [IPv6:2001:4b98:dc2:55:216:3eff:fef7:d647]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D594BC0613D3 for ; Tue, 22 Dec 2020 00:00:53 -0800 (PST) Received: from pendragon.ideasonboard.com (62-78-145-57.bb.dnainternet.fi [62.78.145.57]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 126CD9E6; Tue, 22 Dec 2020 09:00:48 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1608624049; bh=f4p1sTgTeSn5RUZSdIdiOkY5TNMxG220XY3YDtPDBgA=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=vETe9187zY4wCofRJJjRC6VGyLRwf5h1biR+3ngYzgsXlEsWAUUVwbHVcE3MWzqRU ThEZ5X8EnfYpcNLFlfOeBiOpgy/PHmfDrLiODJKFThixIoXGYZlWbNKcmOyYkvyLQk y1KZjN8l4QtF7VTwd5rmRgqnd6tUTKYZelekiIcs= Date: Tue, 22 Dec 2020 10:00:41 +0200 From: Laurent Pinchart To: Kieran Bingham Cc: Laurent Pinchart , dri-devel@lists.freedesktop.org, linux-renesas-soc@vger.kernel.org, Daniel Vetter , Ville =?utf-8?B?U3lyasOkbMOk?= , Pekka Paalanen , Kieran Bingham Subject: Re: [PATCH 3/4] drm: Extend color correction to support 3D-CLU Message-ID: References: <20201221015730.28333-1-laurent.pinchart+renesas@ideasonboard.com> <20201221015730.28333-4-laurent.pinchart+renesas@ideasonboard.com> <313e23d9-ef9e-794c-0be5-f92ec94c9139@ideasonboard.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <313e23d9-ef9e-794c-0be5-f92ec94c9139@ideasonboard.com> Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org Hi Kieran, On Mon, Dec 21, 2020 at 02:09:09PM +0000, Kieran Bingham wrote: > On 21/12/2020 01:57, Laurent Pinchart wrote: > > From: Kieran Bingham > > > > Extend the existing color management properties to support provision > > of a 3D cubic look up table, allowing for color specific adjustments. > > > > Signed-off-by: Kieran Bingham > > Co-developed-by: Laurent Pinchart > > Signed-off-by: Laurent Pinchart > > Again, for the updates since I created the patch: > > Reviewed-by: Kieran Bingham > > A bit of a question on clarifying the added documentation but I don't > think it's major. > > > --- > > drivers/gpu/drm/drm_atomic_helper.c | 1 + > > drivers/gpu/drm/drm_atomic_state_helper.c | 3 ++ > > drivers/gpu/drm/drm_atomic_uapi.c | 10 ++++++ > > drivers/gpu/drm/drm_color_mgmt.c | 41 +++++++++++++++++++---- > > drivers/gpu/drm/drm_mode_config.c | 14 ++++++++ > > include/drm/drm_crtc.h | 9 +++++ > > include/drm/drm_mode_config.h | 11 ++++++ > > 7 files changed, 82 insertions(+), 7 deletions(-) > > > > diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c > > index ba1507036f26..0f54897d3c8d 100644 > > --- a/drivers/gpu/drm/drm_atomic_helper.c > > +++ b/drivers/gpu/drm/drm_atomic_helper.c > > @@ -3558,6 +3558,7 @@ int drm_atomic_helper_legacy_gamma_set(struct drm_crtc *crtc, > > replaced = drm_property_replace_blob(&crtc_state->degamma_lut, NULL); > > replaced |= drm_property_replace_blob(&crtc_state->ctm, NULL); > > replaced |= drm_property_replace_blob(&crtc_state->gamma_lut, blob); > > + replaced |= drm_property_replace_blob(&crtc_state->cubic_lut, NULL); > > crtc_state->color_mgmt_changed |= replaced; > > > > ret = drm_atomic_commit(state); > > diff --git a/drivers/gpu/drm/drm_atomic_state_helper.c b/drivers/gpu/drm/drm_atomic_state_helper.c > > index ddcf5c2c8e6a..61c685b50677 100644 > > --- a/drivers/gpu/drm/drm_atomic_state_helper.c > > +++ b/drivers/gpu/drm/drm_atomic_state_helper.c > > @@ -141,6 +141,8 @@ void __drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc, > > drm_property_blob_get(state->ctm); > > if (state->gamma_lut) > > drm_property_blob_get(state->gamma_lut); > > + if (state->cubic_lut) > > + drm_property_blob_get(state->cubic_lut); > > state->mode_changed = false; > > state->active_changed = false; > > state->planes_changed = false; > > @@ -213,6 +215,7 @@ 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->gamma_lut); > > + drm_property_blob_put(state->cubic_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 268bb69c2e2f..07229acab71c 100644 > > --- a/drivers/gpu/drm/drm_atomic_uapi.c > > +++ b/drivers/gpu/drm/drm_atomic_uapi.c > > @@ -471,6 +471,14 @@ static int drm_atomic_crtc_set_property(struct drm_crtc *crtc, > > &replaced); > > state->color_mgmt_changed |= replaced; > > return ret; > > + } else if (property == config->cubic_lut_property) { > > + ret = drm_atomic_replace_property_blob_from_id(dev, > > + &state->cubic_lut, > > + val, > > + -1, sizeof(struct drm_color_lut), > > + &replaced); > > + state->color_mgmt_changed |= replaced; > > + return ret; > > } else if (property == config->prop_out_fence_ptr) { > > s32 __user *fence_ptr = u64_to_user_ptr(val); > > > > @@ -516,6 +524,8 @@ drm_atomic_crtc_get_property(struct drm_crtc *crtc, > > *val = (state->ctm) ? state->ctm->base.id : 0; > > else if (property == config->gamma_lut_property) > > *val = (state->gamma_lut) ? state->gamma_lut->base.id : 0; > > + else if (property == config->cubic_lut_property) > > + *val = (state->cubic_lut) ? state->cubic_lut->base.id : 0; > > else if (property == config->prop_out_fence_ptr) > > *val = 0; > > else if (property == crtc->scaling_filter_property) > > diff --git a/drivers/gpu/drm/drm_color_mgmt.c b/drivers/gpu/drm/drm_color_mgmt.c > > index 3bcabc2f6e0e..85bbbc8ce8e5 100644 > > --- a/drivers/gpu/drm/drm_color_mgmt.c > > +++ b/drivers/gpu/drm/drm_color_mgmt.c > > @@ -33,7 +33,7 @@ > > /** > > * DOC: overview > > * > > - * Color management or color space adjustments is supported through a set of 5 > > + * Color management or color space adjustments is supported through a set of 7 > > * properties on the &drm_crtc object. They are set up by calling > > * drm_crtc_enable_color_mgmt(). > > * > > @@ -60,7 +60,7 @@ > > * “CTM”: > > * Blob property to set the current transformation matrix (CTM) apply to > > * pixel data after the lookup through the degamma LUT and before the > > - * lookup through the gamma LUT. The data is interpreted as a struct > > + * lookup through the cubic LUT. The data is interpreted as a struct > > * &drm_color_ctm. > > * > > * Setting this to NULL (blob property value set to 0) means a > > @@ -68,13 +68,40 @@ > > * boot-up state too. Drivers can access the blob for the color conversion > > * matrix through &drm_crtc_state.ctm. > > * > > + * ”CUBIC_LUT”: > > + * Blob property to set the cubic (3D) lookup table performing color > > + * mapping after the transformation matrix and before the lookup through > > + * the gamma LUT. Unlike the degamma and gamma LUTs that map color > > + * components independently, the 3D LUT converts an input color to an > > + * output color by indexing into the 3D table using the color components > > + * as a 3D coordinate. The LUT is subsampled as 8-bit (or more) precision > > + * would require too much storage space in the hardware, so the precision > > This sentence is a bit confusing. What bit depth is actually used, is it > mandated to a specific subsampling? Or restricted to 8-bit.... We're both confused then, because I don't think I understand the question :-) > > + * of the color components is reduced before the look up, and the low > > + * order bits may be used to interpolate between the nearest points in 3D > > + * space. > > + * > > + * 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. > > Is the table already reduced precision though ? drm_color_lut has 16-bit precision. The precision of the table on the hardware side varies. > > + * > > + * Setting this to NULL (blob property value set to 0) means 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.cubic_lut. > > + * > > + * ”CUBIC_LUT_SIZE”: > > + * Unsigned range property to give the size of the lookup table to be set > > + * on the CUBIC_LUT property (the size depends on the underlying hardware). > > + * If drivers support multiple LUT sizes then they should publish the > > + * largest size, and sub-sample smaller sized LUTs appropriately. > > + * > > * “GAMMA_LUT”: > > * Blob property to set the gamma lookup table (LUT) mapping pixel data > > - * after the transformation matrix to data sent to the connector. 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 > > - * nor use all the elements of the LUT (for example the hardware might > > - * choose to interpolate between LUT[0] and LUT[4]). > > + * after the cubic LUT to data sent to the connector. 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 nor use > > + * all the elements of the LUT (for example the hardware might choose to > > + * interpolate between LUT[0] and LUT[4]). > > * > > * Setting this to NULL (blob property value set to 0) means a > > * linear/pass-thru gamma table should be used. This is generally the > > diff --git a/drivers/gpu/drm/drm_mode_config.c b/drivers/gpu/drm/drm_mode_config.c > > index f1affc1bb679..6c3324f60e7d 100644 > > --- a/drivers/gpu/drm/drm_mode_config.c > > +++ b/drivers/gpu/drm/drm_mode_config.c > > @@ -364,6 +364,20 @@ static int drm_mode_create_standard_properties(struct drm_device *dev) > > return -ENOMEM; > > dev->mode_config.gamma_lut_size_property = prop; > > > > + prop = drm_property_create(dev, > > + DRM_MODE_PROP_BLOB, > > + "CUBIC_LUT", 0); > > + if (!prop) > > + return -ENOMEM; > > + dev->mode_config.cubic_lut_property = prop; > > + > > + prop = drm_property_create_range(dev, > > + DRM_MODE_PROP_IMMUTABLE, > > + "CUBIC_LUT_SIZE", 0, UINT_MAX); > > + if (!prop) > > + return -ENOMEM; > > + dev->mode_config.cubic_lut_size_property = prop; > > + > > prop = drm_property_create(dev, > > DRM_MODE_PROP_IMMUTABLE | DRM_MODE_PROP_BLOB, > > "IN_FORMATS", 0); > > diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h > > index 5f43d64d2a07..df5cc2239adb 100644 > > --- a/include/drm/drm_crtc.h > > +++ b/include/drm/drm_crtc.h > > @@ -288,6 +288,15 @@ struct drm_crtc_state { > > */ > > struct drm_property_blob *gamma_lut; > > > > + /** > > + * @cubic_lut: > > + * > > + * Cubic Lookup table for converting pixel data. See > > + * drm_crtc_enable_color_mgmt(). The blob (if not NULL) is a 3D array > > + * of &struct drm_color_lut. > > + */ > > + struct drm_property_blob *cubic_lut; > > + > > /** > > * @target_vblank: > > * > > diff --git a/include/drm/drm_mode_config.h b/include/drm/drm_mode_config.h > > index ab424ddd7665..8edb0094e5a7 100644 > > --- a/include/drm/drm_mode_config.h > > +++ b/include/drm/drm_mode_config.h > > @@ -800,6 +800,17 @@ struct drm_mode_config { > > */ > > struct drm_property *gamma_lut_size_property; > > > > + /** > > + * @cubic_lut_property: Optional CRTC property to set the 3D LUT used to > > + * convert color spaces. > > + */ > > + struct drm_property *cubic_lut_property; > > + /** > > + * @cubic_lut_size_property: Optional CRTC property for the size of the > > + * 3D LUT as supported by the driver (read-only). > > + */ > > + struct drm_property *cubic_lut_size_property; > > + > > /** > > * @suggested_x_property: Optional connector property with a hint for > > * the position of the output on the host's screen. -- Regards, Laurent Pinchart From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6FAD4C433DB for ; Tue, 22 Dec 2020 08:00:53 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 2392722D57 for ; Tue, 22 Dec 2020 08:00:52 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2392722D57 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=ideasonboard.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 559ED6E175; Tue, 22 Dec 2020 08:00:52 +0000 (UTC) Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [IPv6:2001:4b98:dc2:55:216:3eff:fef7:d647]) by gabe.freedesktop.org (Postfix) with ESMTPS id 6FCB26E175 for ; Tue, 22 Dec 2020 08:00:51 +0000 (UTC) Received: from pendragon.ideasonboard.com (62-78-145-57.bb.dnainternet.fi [62.78.145.57]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 126CD9E6; Tue, 22 Dec 2020 09:00:48 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1608624049; bh=f4p1sTgTeSn5RUZSdIdiOkY5TNMxG220XY3YDtPDBgA=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=vETe9187zY4wCofRJJjRC6VGyLRwf5h1biR+3ngYzgsXlEsWAUUVwbHVcE3MWzqRU ThEZ5X8EnfYpcNLFlfOeBiOpgy/PHmfDrLiODJKFThixIoXGYZlWbNKcmOyYkvyLQk y1KZjN8l4QtF7VTwd5rmRgqnd6tUTKYZelekiIcs= Date: Tue, 22 Dec 2020 10:00:41 +0200 From: Laurent Pinchart To: Kieran Bingham Subject: Re: [PATCH 3/4] drm: Extend color correction to support 3D-CLU Message-ID: References: <20201221015730.28333-1-laurent.pinchart+renesas@ideasonboard.com> <20201221015730.28333-4-laurent.pinchart+renesas@ideasonboard.com> <313e23d9-ef9e-794c-0be5-f92ec94c9139@ideasonboard.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <313e23d9-ef9e-794c-0be5-f92ec94c9139@ideasonboard.com> 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: Laurent Pinchart , dri-devel@lists.freedesktop.org, linux-renesas-soc@vger.kernel.org, Kieran Bingham Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: 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