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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AD73CC433F5 for ; Tue, 26 Oct 2021 12:02:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8473160F6F for ; Tue, 26 Oct 2021 12:02:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235113AbhJZMFP (ORCPT ); Tue, 26 Oct 2021 08:05:15 -0400 Received: from mx3.molgen.mpg.de ([141.14.17.11]:52551 "EHLO mx1.molgen.mpg.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S233868AbhJZMFN (ORCPT ); Tue, 26 Oct 2021 08:05:13 -0400 Received: from [192.168.0.2] (ip5f5aef5c.dynamic.kabel-deutschland.de [95.90.239.92]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: pmenzel) by mx.molgen.mpg.de (Postfix) with ESMTPSA id 2724E61E64846; Tue, 26 Oct 2021 14:02:47 +0200 (CEST) Message-ID: Date: Tue, 26 Oct 2021 14:02:46 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.2.1 Subject: Re: [PATCH 1/2] drm: Add Gamma and Degamma LUT sizes props to drm_crtc to validate. Content-Language: en-US To: Mark Yacoub Cc: seanpaul@chromium.org, harry.wentland@amd.com, Mark Yacoub , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Daniel Vetter , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Matthias Brugger , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, intel-gfx@lists.freedesktop.org References: <20210929194012.3433306-1-markyacoub@chromium.org> <20211013181228.1578201-1-markyacoub@chromium.org> From: Paul Menzel In-Reply-To: <20211013181228.1578201-1-markyacoub@chromium.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Dear Mark, Thank you for your patch. On 13.10.21 20:12, Mark Yacoub wrote: > From: Mark Yacoub > > [Why] > 1. drm_atomic_helper_check doesn't check for the LUT sizes of either Gamma > or Degamma props in the new CRTC state, allowing any invalid size to > be passed on. > 2. Each driver has its own LUT size, which could also be different for > legacy users. How can the problem be reproduced? > [How] > 1. Create |degamma_lut_size| and |gamma_lut_size| to save the LUT sizes > assigned by the driver when it's initializing its color and CTM > management. > 2. Create drm_atomic_helper_check_crtc which is called by > drm_atomic_helper_check to check the LUT sizes saved in drm_crtc that > they match the sizes in the new CRTC state. > 3. Rename older lut checks that test for the color channels to indicate > it's a channel check. It's not included in drm_atomic_helper_check_crtc > as it's hardware specific and is to be called by the driver. > 4. As the LUT size check now happens in drm_atomic_helper_check, remove > the lut check in intel_color.c > > Fixes: igt@kms_color@pipe-A-invalid-gamma-lut-sizes on MTK If I am not mistaken, the Fixes tag is used for commits I believe. Maybe use Resolves or something similar? > Tested on Zork(amdgpu) and Jacuzzi(mediatek), volteer(TGL) Please add a space before the (. How did you test this? > v1: > 1. Fix typos > 2. Remove the LUT size check from intel driver > 3. Rename old LUT check to indicate it's a channel change > > Signed-off-by: Mark Yacoub > --- > drivers/gpu/drm/drm_atomic_helper.c | 60 ++++++++++++++++++++++ > drivers/gpu/drm/drm_color_mgmt.c | 14 ++--- > drivers/gpu/drm/i915/display/intel_color.c | 14 ++--- > include/drm/drm_atomic_helper.h | 1 + > include/drm/drm_color_mgmt.h | 7 +-- > include/drm/drm_crtc.h | 11 ++++ > 6 files changed, 89 insertions(+), 18 deletions(-) > > diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c > index bc3487964fb5e..5feb2ad0209c3 100644 > --- a/drivers/gpu/drm/drm_atomic_helper.c > +++ b/drivers/gpu/drm/drm_atomic_helper.c > @@ -929,6 +929,62 @@ drm_atomic_helper_check_planes(struct drm_device *dev, > } > EXPORT_SYMBOL(drm_atomic_helper_check_planes); > > +/** > + * drm_atomic_helper_check_crtcs - validate state object for CRTC changes > + * @state: the driver state object > + * > + * Check the CRTC state object such as the Gamma/Degamma LUT sizes if the new > + * state holds them. > + * > + * RETURNS: > + * Zero for success or -errno > + */ > +int drm_atomic_helper_check_crtcs(struct drm_atomic_state *state) > +{ > + struct drm_crtc *crtc; > + struct drm_crtc_state *new_crtc_state; > + int i; > + > + for_each_new_crtc_in_state (state, crtc, new_crtc_state, i) { > + if (new_crtc_state->color_mgmt_changed && > + new_crtc_state->gamma_lut) { > + uint64_t supported_lut_size = crtc->gamma_lut_size; > + uint32_t supported_legacy_lut_size = crtc->gamma_size; > + uint32_t new_state_lut_size = > + drm_color_lut_size(new_crtc_state->gamma_lut); > + > + if (new_state_lut_size != supported_lut_size && > + new_state_lut_size != supported_legacy_lut_size) { > + drm_dbg_state( > + state->dev, > + "Invalid Gamma LUT size. Should be %u (or %u for legacy) but got %u.\n", > + supported_lut_size, > + supported_legacy_lut_size, > + new_state_lut_size); > + return -EINVAL; > + } > + } > + > + if (new_crtc_state->color_mgmt_changed && > + new_crtc_state->degamma_lut) { > + uint32_t new_state_lut_size = > + drm_color_lut_size(new_crtc_state->degamma_lut); > + uint64_t supported_lut_size = crtc->degamma_lut_size; > + > + if (new_state_lut_size != supported_lut_size) { > + drm_dbg_state( > + state->dev, > + "Invalid Degamma LUT size. Should be %u but got %u.\n", > + supported_lut_size, new_state_lut_size); > + return -EINVAL; > + } > + } > + } > + > + return 0; > +} > +EXPORT_SYMBOL(drm_atomic_helper_check_crtcs); > + > /** > * drm_atomic_helper_check - validate state object > * @dev: DRM device > @@ -974,6 +1030,10 @@ int drm_atomic_helper_check(struct drm_device *dev, > if (ret) > return ret; > > + ret = drm_atomic_helper_check_crtcs(state); > + if (ret) > + return ret; > + > if (state->legacy_cursor_update) > state->async_update = !drm_atomic_helper_async_check(dev, state); > > diff --git a/drivers/gpu/drm/drm_color_mgmt.c b/drivers/gpu/drm/drm_color_mgmt.c > index bb14f488c8f6c..e5b820ce823bf 100644 > --- a/drivers/gpu/drm/drm_color_mgmt.c > +++ b/drivers/gpu/drm/drm_color_mgmt.c > @@ -166,6 +166,7 @@ void drm_crtc_enable_color_mgmt(struct drm_crtc *crtc, > struct drm_mode_config *config = &dev->mode_config; > > if (degamma_lut_size) { > + crtc->degamma_lut_size = degamma_lut_size; > drm_object_attach_property(&crtc->base, > config->degamma_lut_property, 0); > drm_object_attach_property(&crtc->base, > @@ -178,6 +179,7 @@ void drm_crtc_enable_color_mgmt(struct drm_crtc *crtc, > config->ctm_property, 0); > > if (gamma_lut_size) { > + crtc->gamma_lut_size = gamma_lut_size; > drm_object_attach_property(&crtc->base, > config->gamma_lut_property, 0); > drm_object_attach_property(&crtc->base, > @@ -585,17 +587,17 @@ int drm_plane_create_color_properties(struct drm_plane *plane, > EXPORT_SYMBOL(drm_plane_create_color_properties); > > /** > - * drm_color_lut_check - check validity of lookup table > + * drm_color_lut_channels_check - check validity of the channels in the lookup table > * @lut: property blob containing LUT to check > * @tests: bitmask of tests to run > * > - * Helper to check whether a userspace-provided lookup table is valid and > - * satisfies hardware requirements. Drivers pass a bitmask indicating which of > - * the tests in &drm_color_lut_tests should be performed. > + * Helper to check whether each color channel of userspace-provided lookup table is valid and > + * satisfies hardware requirements. Drivers pass a bitmask indicating which of in > + * &drm_color_lut_channels_tests should be performed. > * > * Returns 0 on success, -EINVAL on failure. > */ > -int drm_color_lut_check(const struct drm_property_blob *lut, u32 tests) > +int drm_color_lut_channels_check(const struct drm_property_blob *lut, u32 tests) > { > const struct drm_color_lut *entry; > int i; > @@ -625,4 +627,4 @@ int drm_color_lut_check(const struct drm_property_blob *lut, u32 tests) > > return 0; > } > -EXPORT_SYMBOL(drm_color_lut_check); > +EXPORT_SYMBOL(drm_color_lut_channels_check); > diff --git a/drivers/gpu/drm/i915/display/intel_color.c b/drivers/gpu/drm/i915/display/intel_color.c > index dab892d2251ba..a308fe52746ac 100644 > --- a/drivers/gpu/drm/i915/display/intel_color.c > +++ b/drivers/gpu/drm/i915/display/intel_color.c > @@ -1285,7 +1285,7 @@ static int check_luts(const struct intel_crtc_state *crtc_state) > const struct drm_property_blob *gamma_lut = crtc_state->hw.gamma_lut; > const struct drm_property_blob *degamma_lut = crtc_state->hw.degamma_lut; > int gamma_length, degamma_length; > - u32 gamma_tests, degamma_tests; > + u32 gamma_channels_tests, degamma_channels_tests; > > /* Always allow legacy gamma LUT with no further checking. */ > if (crtc_state_is_legacy_gamma(crtc_state)) > @@ -1300,15 +1300,11 @@ static int check_luts(const struct intel_crtc_state *crtc_state) > > degamma_length = INTEL_INFO(dev_priv)->color.degamma_lut_size; > gamma_length = INTEL_INFO(dev_priv)->color.gamma_lut_size; > - degamma_tests = INTEL_INFO(dev_priv)->color.degamma_lut_tests; > - gamma_tests = INTEL_INFO(dev_priv)->color.gamma_lut_tests; > + degamma_channels_tests = INTEL_INFO(dev_priv)->color.degamma_lut_tests; > + gamma_channels_tests = INTEL_INFO(dev_priv)->color.gamma_lut_tests; > > - if (check_lut_size(degamma_lut, degamma_length) || > - check_lut_size(gamma_lut, gamma_length)) > - return -EINVAL; > - > - if (drm_color_lut_check(degamma_lut, degamma_tests) || > - drm_color_lut_check(gamma_lut, gamma_tests)) > + if (drm_color_lut_channels_check(degamma_lut, degamma_channels_tests) || > + drm_color_lut_channels_check(gamma_lut, gamma_channels_tests)) > return -EINVAL; > > return 0; > diff --git a/include/drm/drm_atomic_helper.h b/include/drm/drm_atomic_helper.h > index 4045e2507e11c..a22d32a7a8719 100644 > --- a/include/drm/drm_atomic_helper.h > +++ b/include/drm/drm_atomic_helper.h > @@ -38,6 +38,7 @@ struct drm_atomic_state; > struct drm_private_obj; > struct drm_private_state; > > +int drm_atomic_helper_check_crtcs(struct drm_atomic_state *state); > int drm_atomic_helper_check_modeset(struct drm_device *dev, > struct drm_atomic_state *state); > int drm_atomic_helper_check_plane_state(struct drm_plane_state *plane_state, > diff --git a/include/drm/drm_color_mgmt.h b/include/drm/drm_color_mgmt.h > index 81c298488b0c8..cb1bf361ad3e3 100644 > --- a/include/drm/drm_color_mgmt.h > +++ b/include/drm/drm_color_mgmt.h > @@ -94,12 +94,12 @@ int drm_plane_create_color_properties(struct drm_plane *plane, > enum drm_color_range default_range); > > /** > - * enum drm_color_lut_tests - hw-specific LUT tests to perform > + * enum drm_color_lut_channels_tests - hw-specific LUT tests to perform > * > * The drm_color_lut_check() function takes a bitmask of the values here to > * determine which tests to apply to a userspace-provided LUT. > */ > -enum drm_color_lut_tests { > +enum drm_color_lut_channels_tests { > /** > * @DRM_COLOR_LUT_EQUAL_CHANNELS: > * > @@ -119,5 +119,6 @@ enum drm_color_lut_tests { > DRM_COLOR_LUT_NON_DECREASING = BIT(1), > }; > > -int drm_color_lut_check(const struct drm_property_blob *lut, u32 tests); > +int drm_color_lut_channels_check(const struct drm_property_blob *lut, > + u32 tests); > #endif > diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h > index 2deb15d7e1610..cabd3ef1a6e32 100644 > --- a/include/drm/drm_crtc.h > +++ b/include/drm/drm_crtc.h > @@ -1072,6 +1072,17 @@ struct drm_crtc { > /** @funcs: CRTC control functions */ > const struct drm_crtc_funcs *funcs; > > + /** > + * @degamma_lut_size: Size of degamma LUT. > + */ > + uint32_t degamma_lut_size; > + > + /** > + * @gamma_lut_size: Size of Gamma LUT. Not used by legacy userspace such as > + * X, which doesn't support large lut sizes. > + */ > + uint32_t gamma_lut_size; > + > /** > * @gamma_size: Size of legacy gamma ramp reported to userspace. Set up > * by calling drm_mode_crtc_set_gamma_size(). > Acked-by: Paul Menzel Kind regards, Paul 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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E2E1EC433F5 for ; Tue, 26 Oct 2021 12:03:30 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 522FB60F39 for ; Tue, 26 Oct 2021 12:03:30 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 522FB60F39 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=molgen.mpg.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Content-Type: Content-Transfer-Encoding:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:From:References:Cc:To:Subject: MIME-Version:Date:Message-ID:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=jov7wG0pw7xab8w18+d07kIV4q2yMEl68LFtbv7Zuo8=; b=WcBnKCxb4igl+W z8L7/Sp7PzM0U+HXMifh1pBTLteVqRycGAq19wFP/0vXrFaOw0r3keLWsxY206sXIpnyxVf5eR70h SSebdtKj67D6qQkpEA8anocgkP0EW/vFww6JK/p9l4IVqcgszNQ2O5BVSojGyznHifZYH5PdfaFq6 e3SWMJrw1Cz1LAvROee86nPak6VLY+KAvN9CjJdewpWgsmI1RXjwvUmovDGytQTsK+cx5786GSbj+ KyyFzp1+plRftV9QExqqaeYZdvW2Kh0a+HpNNhmyfsUFn80C72Guhe/UzLmB1NRRvwvkmd7Qv4mrH sl4v8tYbxVBIahx1/Sdg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mfLAk-001jCf-CE; Tue, 26 Oct 2021 12:03:18 +0000 Received: from mx3.molgen.mpg.de ([141.14.17.11] helo=mx1.molgen.mpg.de) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mfLAV-001j8j-8G; Tue, 26 Oct 2021 12:03:06 +0000 Received: from [192.168.0.2] (ip5f5aef5c.dynamic.kabel-deutschland.de [95.90.239.92]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: pmenzel) by mx.molgen.mpg.de (Postfix) with ESMTPSA id 2724E61E64846; Tue, 26 Oct 2021 14:02:47 +0200 (CEST) Message-ID: Date: Tue, 26 Oct 2021 14:02:46 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.2.1 Subject: Re: [PATCH 1/2] drm: Add Gamma and Degamma LUT sizes props to drm_crtc to validate. Content-Language: en-US To: Mark Yacoub Cc: seanpaul@chromium.org, harry.wentland@amd.com, Mark Yacoub , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Daniel Vetter , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Matthias Brugger , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, intel-gfx@lists.freedesktop.org References: <20210929194012.3433306-1-markyacoub@chromium.org> <20211013181228.1578201-1-markyacoub@chromium.org> From: Paul Menzel In-Reply-To: <20211013181228.1578201-1-markyacoub@chromium.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211026_050303_662426_B7D3BBD4 X-CRM114-Status: GOOD ( 39.28 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org Dear Mark, Thank you for your patch. On 13.10.21 20:12, Mark Yacoub wrote: > From: Mark Yacoub > > [Why] > 1. drm_atomic_helper_check doesn't check for the LUT sizes of either Gamma > or Degamma props in the new CRTC state, allowing any invalid size to > be passed on. > 2. Each driver has its own LUT size, which could also be different for > legacy users. How can the problem be reproduced? > [How] > 1. Create |degamma_lut_size| and |gamma_lut_size| to save the LUT sizes > assigned by the driver when it's initializing its color and CTM > management. > 2. Create drm_atomic_helper_check_crtc which is called by > drm_atomic_helper_check to check the LUT sizes saved in drm_crtc that > they match the sizes in the new CRTC state. > 3. Rename older lut checks that test for the color channels to indicate > it's a channel check. It's not included in drm_atomic_helper_check_crtc > as it's hardware specific and is to be called by the driver. > 4. As the LUT size check now happens in drm_atomic_helper_check, remove > the lut check in intel_color.c > > Fixes: igt@kms_color@pipe-A-invalid-gamma-lut-sizes on MTK If I am not mistaken, the Fixes tag is used for commits I believe. Maybe use Resolves or something similar? > Tested on Zork(amdgpu) and Jacuzzi(mediatek), volteer(TGL) Please add a space before the (. How did you test this? > v1: > 1. Fix typos > 2. Remove the LUT size check from intel driver > 3. Rename old LUT check to indicate it's a channel change > > Signed-off-by: Mark Yacoub > --- > drivers/gpu/drm/drm_atomic_helper.c | 60 ++++++++++++++++++++++ > drivers/gpu/drm/drm_color_mgmt.c | 14 ++--- > drivers/gpu/drm/i915/display/intel_color.c | 14 ++--- > include/drm/drm_atomic_helper.h | 1 + > include/drm/drm_color_mgmt.h | 7 +-- > include/drm/drm_crtc.h | 11 ++++ > 6 files changed, 89 insertions(+), 18 deletions(-) > > diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c > index bc3487964fb5e..5feb2ad0209c3 100644 > --- a/drivers/gpu/drm/drm_atomic_helper.c > +++ b/drivers/gpu/drm/drm_atomic_helper.c > @@ -929,6 +929,62 @@ drm_atomic_helper_check_planes(struct drm_device *dev, > } > EXPORT_SYMBOL(drm_atomic_helper_check_planes); > > +/** > + * drm_atomic_helper_check_crtcs - validate state object for CRTC changes > + * @state: the driver state object > + * > + * Check the CRTC state object such as the Gamma/Degamma LUT sizes if the new > + * state holds them. > + * > + * RETURNS: > + * Zero for success or -errno > + */ > +int drm_atomic_helper_check_crtcs(struct drm_atomic_state *state) > +{ > + struct drm_crtc *crtc; > + struct drm_crtc_state *new_crtc_state; > + int i; > + > + for_each_new_crtc_in_state (state, crtc, new_crtc_state, i) { > + if (new_crtc_state->color_mgmt_changed && > + new_crtc_state->gamma_lut) { > + uint64_t supported_lut_size = crtc->gamma_lut_size; > + uint32_t supported_legacy_lut_size = crtc->gamma_size; > + uint32_t new_state_lut_size = > + drm_color_lut_size(new_crtc_state->gamma_lut); > + > + if (new_state_lut_size != supported_lut_size && > + new_state_lut_size != supported_legacy_lut_size) { > + drm_dbg_state( > + state->dev, > + "Invalid Gamma LUT size. Should be %u (or %u for legacy) but got %u.\n", > + supported_lut_size, > + supported_legacy_lut_size, > + new_state_lut_size); > + return -EINVAL; > + } > + } > + > + if (new_crtc_state->color_mgmt_changed && > + new_crtc_state->degamma_lut) { > + uint32_t new_state_lut_size = > + drm_color_lut_size(new_crtc_state->degamma_lut); > + uint64_t supported_lut_size = crtc->degamma_lut_size; > + > + if (new_state_lut_size != supported_lut_size) { > + drm_dbg_state( > + state->dev, > + "Invalid Degamma LUT size. Should be %u but got %u.\n", > + supported_lut_size, new_state_lut_size); > + return -EINVAL; > + } > + } > + } > + > + return 0; > +} > +EXPORT_SYMBOL(drm_atomic_helper_check_crtcs); > + > /** > * drm_atomic_helper_check - validate state object > * @dev: DRM device > @@ -974,6 +1030,10 @@ int drm_atomic_helper_check(struct drm_device *dev, > if (ret) > return ret; > > + ret = drm_atomic_helper_check_crtcs(state); > + if (ret) > + return ret; > + > if (state->legacy_cursor_update) > state->async_update = !drm_atomic_helper_async_check(dev, state); > > diff --git a/drivers/gpu/drm/drm_color_mgmt.c b/drivers/gpu/drm/drm_color_mgmt.c > index bb14f488c8f6c..e5b820ce823bf 100644 > --- a/drivers/gpu/drm/drm_color_mgmt.c > +++ b/drivers/gpu/drm/drm_color_mgmt.c > @@ -166,6 +166,7 @@ void drm_crtc_enable_color_mgmt(struct drm_crtc *crtc, > struct drm_mode_config *config = &dev->mode_config; > > if (degamma_lut_size) { > + crtc->degamma_lut_size = degamma_lut_size; > drm_object_attach_property(&crtc->base, > config->degamma_lut_property, 0); > drm_object_attach_property(&crtc->base, > @@ -178,6 +179,7 @@ void drm_crtc_enable_color_mgmt(struct drm_crtc *crtc, > config->ctm_property, 0); > > if (gamma_lut_size) { > + crtc->gamma_lut_size = gamma_lut_size; > drm_object_attach_property(&crtc->base, > config->gamma_lut_property, 0); > drm_object_attach_property(&crtc->base, > @@ -585,17 +587,17 @@ int drm_plane_create_color_properties(struct drm_plane *plane, > EXPORT_SYMBOL(drm_plane_create_color_properties); > > /** > - * drm_color_lut_check - check validity of lookup table > + * drm_color_lut_channels_check - check validity of the channels in the lookup table > * @lut: property blob containing LUT to check > * @tests: bitmask of tests to run > * > - * Helper to check whether a userspace-provided lookup table is valid and > - * satisfies hardware requirements. Drivers pass a bitmask indicating which of > - * the tests in &drm_color_lut_tests should be performed. > + * Helper to check whether each color channel of userspace-provided lookup table is valid and > + * satisfies hardware requirements. Drivers pass a bitmask indicating which of in > + * &drm_color_lut_channels_tests should be performed. > * > * Returns 0 on success, -EINVAL on failure. > */ > -int drm_color_lut_check(const struct drm_property_blob *lut, u32 tests) > +int drm_color_lut_channels_check(const struct drm_property_blob *lut, u32 tests) > { > const struct drm_color_lut *entry; > int i; > @@ -625,4 +627,4 @@ int drm_color_lut_check(const struct drm_property_blob *lut, u32 tests) > > return 0; > } > -EXPORT_SYMBOL(drm_color_lut_check); > +EXPORT_SYMBOL(drm_color_lut_channels_check); > diff --git a/drivers/gpu/drm/i915/display/intel_color.c b/drivers/gpu/drm/i915/display/intel_color.c > index dab892d2251ba..a308fe52746ac 100644 > --- a/drivers/gpu/drm/i915/display/intel_color.c > +++ b/drivers/gpu/drm/i915/display/intel_color.c > @@ -1285,7 +1285,7 @@ static int check_luts(const struct intel_crtc_state *crtc_state) > const struct drm_property_blob *gamma_lut = crtc_state->hw.gamma_lut; > const struct drm_property_blob *degamma_lut = crtc_state->hw.degamma_lut; > int gamma_length, degamma_length; > - u32 gamma_tests, degamma_tests; > + u32 gamma_channels_tests, degamma_channels_tests; > > /* Always allow legacy gamma LUT with no further checking. */ > if (crtc_state_is_legacy_gamma(crtc_state)) > @@ -1300,15 +1300,11 @@ static int check_luts(const struct intel_crtc_state *crtc_state) > > degamma_length = INTEL_INFO(dev_priv)->color.degamma_lut_size; > gamma_length = INTEL_INFO(dev_priv)->color.gamma_lut_size; > - degamma_tests = INTEL_INFO(dev_priv)->color.degamma_lut_tests; > - gamma_tests = INTEL_INFO(dev_priv)->color.gamma_lut_tests; > + degamma_channels_tests = INTEL_INFO(dev_priv)->color.degamma_lut_tests; > + gamma_channels_tests = INTEL_INFO(dev_priv)->color.gamma_lut_tests; > > - if (check_lut_size(degamma_lut, degamma_length) || > - check_lut_size(gamma_lut, gamma_length)) > - return -EINVAL; > - > - if (drm_color_lut_check(degamma_lut, degamma_tests) || > - drm_color_lut_check(gamma_lut, gamma_tests)) > + if (drm_color_lut_channels_check(degamma_lut, degamma_channels_tests) || > + drm_color_lut_channels_check(gamma_lut, gamma_channels_tests)) > return -EINVAL; > > return 0; > diff --git a/include/drm/drm_atomic_helper.h b/include/drm/drm_atomic_helper.h > index 4045e2507e11c..a22d32a7a8719 100644 > --- a/include/drm/drm_atomic_helper.h > +++ b/include/drm/drm_atomic_helper.h > @@ -38,6 +38,7 @@ struct drm_atomic_state; > struct drm_private_obj; > struct drm_private_state; > > +int drm_atomic_helper_check_crtcs(struct drm_atomic_state *state); > int drm_atomic_helper_check_modeset(struct drm_device *dev, > struct drm_atomic_state *state); > int drm_atomic_helper_check_plane_state(struct drm_plane_state *plane_state, > diff --git a/include/drm/drm_color_mgmt.h b/include/drm/drm_color_mgmt.h > index 81c298488b0c8..cb1bf361ad3e3 100644 > --- a/include/drm/drm_color_mgmt.h > +++ b/include/drm/drm_color_mgmt.h > @@ -94,12 +94,12 @@ int drm_plane_create_color_properties(struct drm_plane *plane, > enum drm_color_range default_range); > > /** > - * enum drm_color_lut_tests - hw-specific LUT tests to perform > + * enum drm_color_lut_channels_tests - hw-specific LUT tests to perform > * > * The drm_color_lut_check() function takes a bitmask of the values here to > * determine which tests to apply to a userspace-provided LUT. > */ > -enum drm_color_lut_tests { > +enum drm_color_lut_channels_tests { > /** > * @DRM_COLOR_LUT_EQUAL_CHANNELS: > * > @@ -119,5 +119,6 @@ enum drm_color_lut_tests { > DRM_COLOR_LUT_NON_DECREASING = BIT(1), > }; > > -int drm_color_lut_check(const struct drm_property_blob *lut, u32 tests); > +int drm_color_lut_channels_check(const struct drm_property_blob *lut, > + u32 tests); > #endif > diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h > index 2deb15d7e1610..cabd3ef1a6e32 100644 > --- a/include/drm/drm_crtc.h > +++ b/include/drm/drm_crtc.h > @@ -1072,6 +1072,17 @@ struct drm_crtc { > /** @funcs: CRTC control functions */ > const struct drm_crtc_funcs *funcs; > > + /** > + * @degamma_lut_size: Size of degamma LUT. > + */ > + uint32_t degamma_lut_size; > + > + /** > + * @gamma_lut_size: Size of Gamma LUT. Not used by legacy userspace such as > + * X, which doesn't support large lut sizes. > + */ > + uint32_t gamma_lut_size; > + > /** > * @gamma_size: Size of legacy gamma ramp reported to userspace. Set up > * by calling drm_mode_crtc_set_gamma_size(). > Acked-by: Paul Menzel Kind regards, Paul _______________________________________________ Linux-mediatek mailing list Linux-mediatek@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-mediatek 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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A67DEC433F5 for ; Tue, 26 Oct 2021 12:04:48 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 7058260F39 for ; Tue, 26 Oct 2021 12:04:48 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 7058260F39 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=molgen.mpg.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Content-Type: Content-Transfer-Encoding:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:From:References:Cc:To:Subject: MIME-Version:Date:Message-ID:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=2YWzD3Y2XEEzVAEJM6DWWm4OPLc2PMqjMgMfFd3WllI=; b=SBz5tkBZrqMGIv GJDqHBgTy3g/ZgmJ/5bhQi8YcGw03Fopgw79JNhqNUtaXyFynB8lmqOjxLk8Ns2oAbs6ZmzsuVwNP 5lnj8xrJgqAamygN3K/S2Y0atw9TKpogCD4C3A4/SaYbDJUpA9CmtCkPy9Pf/84kl4QRm6QYUiqTD KwIgZFKN+YpwwFgKk1TEf0x74pagObZCRB+kOUP6sr/ExtKsvMYA97hINVFUmm/TjLwrTTD+haqjU KyFbYRePf/aEdA8N/NFVuWJYunBC1RQfVD2DIWGh2mpVxXUfiEmCR87AgkQBdQnnK76pDWrk5jaFQ X2ccrVCQx6DBGWcIH6Ng==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mfLAb-001jB5-71; Tue, 26 Oct 2021 12:03:09 +0000 Received: from mx3.molgen.mpg.de ([141.14.17.11] helo=mx1.molgen.mpg.de) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mfLAV-001j8j-8G; Tue, 26 Oct 2021 12:03:06 +0000 Received: from [192.168.0.2] (ip5f5aef5c.dynamic.kabel-deutschland.de [95.90.239.92]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: pmenzel) by mx.molgen.mpg.de (Postfix) with ESMTPSA id 2724E61E64846; Tue, 26 Oct 2021 14:02:47 +0200 (CEST) Message-ID: Date: Tue, 26 Oct 2021 14:02:46 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.2.1 Subject: Re: [PATCH 1/2] drm: Add Gamma and Degamma LUT sizes props to drm_crtc to validate. Content-Language: en-US To: Mark Yacoub Cc: seanpaul@chromium.org, harry.wentland@amd.com, Mark Yacoub , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Daniel Vetter , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Matthias Brugger , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, intel-gfx@lists.freedesktop.org References: <20210929194012.3433306-1-markyacoub@chromium.org> <20211013181228.1578201-1-markyacoub@chromium.org> From: Paul Menzel In-Reply-To: <20211013181228.1578201-1-markyacoub@chromium.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211026_050303_662426_B7D3BBD4 X-CRM114-Status: GOOD ( 39.28 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Dear Mark, Thank you for your patch. On 13.10.21 20:12, Mark Yacoub wrote: > From: Mark Yacoub > > [Why] > 1. drm_atomic_helper_check doesn't check for the LUT sizes of either Gamma > or Degamma props in the new CRTC state, allowing any invalid size to > be passed on. > 2. Each driver has its own LUT size, which could also be different for > legacy users. How can the problem be reproduced? > [How] > 1. Create |degamma_lut_size| and |gamma_lut_size| to save the LUT sizes > assigned by the driver when it's initializing its color and CTM > management. > 2. Create drm_atomic_helper_check_crtc which is called by > drm_atomic_helper_check to check the LUT sizes saved in drm_crtc that > they match the sizes in the new CRTC state. > 3. Rename older lut checks that test for the color channels to indicate > it's a channel check. It's not included in drm_atomic_helper_check_crtc > as it's hardware specific and is to be called by the driver. > 4. As the LUT size check now happens in drm_atomic_helper_check, remove > the lut check in intel_color.c > > Fixes: igt@kms_color@pipe-A-invalid-gamma-lut-sizes on MTK If I am not mistaken, the Fixes tag is used for commits I believe. Maybe use Resolves or something similar? > Tested on Zork(amdgpu) and Jacuzzi(mediatek), volteer(TGL) Please add a space before the (. How did you test this? > v1: > 1. Fix typos > 2. Remove the LUT size check from intel driver > 3. Rename old LUT check to indicate it's a channel change > > Signed-off-by: Mark Yacoub > --- > drivers/gpu/drm/drm_atomic_helper.c | 60 ++++++++++++++++++++++ > drivers/gpu/drm/drm_color_mgmt.c | 14 ++--- > drivers/gpu/drm/i915/display/intel_color.c | 14 ++--- > include/drm/drm_atomic_helper.h | 1 + > include/drm/drm_color_mgmt.h | 7 +-- > include/drm/drm_crtc.h | 11 ++++ > 6 files changed, 89 insertions(+), 18 deletions(-) > > diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c > index bc3487964fb5e..5feb2ad0209c3 100644 > --- a/drivers/gpu/drm/drm_atomic_helper.c > +++ b/drivers/gpu/drm/drm_atomic_helper.c > @@ -929,6 +929,62 @@ drm_atomic_helper_check_planes(struct drm_device *dev, > } > EXPORT_SYMBOL(drm_atomic_helper_check_planes); > > +/** > + * drm_atomic_helper_check_crtcs - validate state object for CRTC changes > + * @state: the driver state object > + * > + * Check the CRTC state object such as the Gamma/Degamma LUT sizes if the new > + * state holds them. > + * > + * RETURNS: > + * Zero for success or -errno > + */ > +int drm_atomic_helper_check_crtcs(struct drm_atomic_state *state) > +{ > + struct drm_crtc *crtc; > + struct drm_crtc_state *new_crtc_state; > + int i; > + > + for_each_new_crtc_in_state (state, crtc, new_crtc_state, i) { > + if (new_crtc_state->color_mgmt_changed && > + new_crtc_state->gamma_lut) { > + uint64_t supported_lut_size = crtc->gamma_lut_size; > + uint32_t supported_legacy_lut_size = crtc->gamma_size; > + uint32_t new_state_lut_size = > + drm_color_lut_size(new_crtc_state->gamma_lut); > + > + if (new_state_lut_size != supported_lut_size && > + new_state_lut_size != supported_legacy_lut_size) { > + drm_dbg_state( > + state->dev, > + "Invalid Gamma LUT size. Should be %u (or %u for legacy) but got %u.\n", > + supported_lut_size, > + supported_legacy_lut_size, > + new_state_lut_size); > + return -EINVAL; > + } > + } > + > + if (new_crtc_state->color_mgmt_changed && > + new_crtc_state->degamma_lut) { > + uint32_t new_state_lut_size = > + drm_color_lut_size(new_crtc_state->degamma_lut); > + uint64_t supported_lut_size = crtc->degamma_lut_size; > + > + if (new_state_lut_size != supported_lut_size) { > + drm_dbg_state( > + state->dev, > + "Invalid Degamma LUT size. Should be %u but got %u.\n", > + supported_lut_size, new_state_lut_size); > + return -EINVAL; > + } > + } > + } > + > + return 0; > +} > +EXPORT_SYMBOL(drm_atomic_helper_check_crtcs); > + > /** > * drm_atomic_helper_check - validate state object > * @dev: DRM device > @@ -974,6 +1030,10 @@ int drm_atomic_helper_check(struct drm_device *dev, > if (ret) > return ret; > > + ret = drm_atomic_helper_check_crtcs(state); > + if (ret) > + return ret; > + > if (state->legacy_cursor_update) > state->async_update = !drm_atomic_helper_async_check(dev, state); > > diff --git a/drivers/gpu/drm/drm_color_mgmt.c b/drivers/gpu/drm/drm_color_mgmt.c > index bb14f488c8f6c..e5b820ce823bf 100644 > --- a/drivers/gpu/drm/drm_color_mgmt.c > +++ b/drivers/gpu/drm/drm_color_mgmt.c > @@ -166,6 +166,7 @@ void drm_crtc_enable_color_mgmt(struct drm_crtc *crtc, > struct drm_mode_config *config = &dev->mode_config; > > if (degamma_lut_size) { > + crtc->degamma_lut_size = degamma_lut_size; > drm_object_attach_property(&crtc->base, > config->degamma_lut_property, 0); > drm_object_attach_property(&crtc->base, > @@ -178,6 +179,7 @@ void drm_crtc_enable_color_mgmt(struct drm_crtc *crtc, > config->ctm_property, 0); > > if (gamma_lut_size) { > + crtc->gamma_lut_size = gamma_lut_size; > drm_object_attach_property(&crtc->base, > config->gamma_lut_property, 0); > drm_object_attach_property(&crtc->base, > @@ -585,17 +587,17 @@ int drm_plane_create_color_properties(struct drm_plane *plane, > EXPORT_SYMBOL(drm_plane_create_color_properties); > > /** > - * drm_color_lut_check - check validity of lookup table > + * drm_color_lut_channels_check - check validity of the channels in the lookup table > * @lut: property blob containing LUT to check > * @tests: bitmask of tests to run > * > - * Helper to check whether a userspace-provided lookup table is valid and > - * satisfies hardware requirements. Drivers pass a bitmask indicating which of > - * the tests in &drm_color_lut_tests should be performed. > + * Helper to check whether each color channel of userspace-provided lookup table is valid and > + * satisfies hardware requirements. Drivers pass a bitmask indicating which of in > + * &drm_color_lut_channels_tests should be performed. > * > * Returns 0 on success, -EINVAL on failure. > */ > -int drm_color_lut_check(const struct drm_property_blob *lut, u32 tests) > +int drm_color_lut_channels_check(const struct drm_property_blob *lut, u32 tests) > { > const struct drm_color_lut *entry; > int i; > @@ -625,4 +627,4 @@ int drm_color_lut_check(const struct drm_property_blob *lut, u32 tests) > > return 0; > } > -EXPORT_SYMBOL(drm_color_lut_check); > +EXPORT_SYMBOL(drm_color_lut_channels_check); > diff --git a/drivers/gpu/drm/i915/display/intel_color.c b/drivers/gpu/drm/i915/display/intel_color.c > index dab892d2251ba..a308fe52746ac 100644 > --- a/drivers/gpu/drm/i915/display/intel_color.c > +++ b/drivers/gpu/drm/i915/display/intel_color.c > @@ -1285,7 +1285,7 @@ static int check_luts(const struct intel_crtc_state *crtc_state) > const struct drm_property_blob *gamma_lut = crtc_state->hw.gamma_lut; > const struct drm_property_blob *degamma_lut = crtc_state->hw.degamma_lut; > int gamma_length, degamma_length; > - u32 gamma_tests, degamma_tests; > + u32 gamma_channels_tests, degamma_channels_tests; > > /* Always allow legacy gamma LUT with no further checking. */ > if (crtc_state_is_legacy_gamma(crtc_state)) > @@ -1300,15 +1300,11 @@ static int check_luts(const struct intel_crtc_state *crtc_state) > > degamma_length = INTEL_INFO(dev_priv)->color.degamma_lut_size; > gamma_length = INTEL_INFO(dev_priv)->color.gamma_lut_size; > - degamma_tests = INTEL_INFO(dev_priv)->color.degamma_lut_tests; > - gamma_tests = INTEL_INFO(dev_priv)->color.gamma_lut_tests; > + degamma_channels_tests = INTEL_INFO(dev_priv)->color.degamma_lut_tests; > + gamma_channels_tests = INTEL_INFO(dev_priv)->color.gamma_lut_tests; > > - if (check_lut_size(degamma_lut, degamma_length) || > - check_lut_size(gamma_lut, gamma_length)) > - return -EINVAL; > - > - if (drm_color_lut_check(degamma_lut, degamma_tests) || > - drm_color_lut_check(gamma_lut, gamma_tests)) > + if (drm_color_lut_channels_check(degamma_lut, degamma_channels_tests) || > + drm_color_lut_channels_check(gamma_lut, gamma_channels_tests)) > return -EINVAL; > > return 0; > diff --git a/include/drm/drm_atomic_helper.h b/include/drm/drm_atomic_helper.h > index 4045e2507e11c..a22d32a7a8719 100644 > --- a/include/drm/drm_atomic_helper.h > +++ b/include/drm/drm_atomic_helper.h > @@ -38,6 +38,7 @@ struct drm_atomic_state; > struct drm_private_obj; > struct drm_private_state; > > +int drm_atomic_helper_check_crtcs(struct drm_atomic_state *state); > int drm_atomic_helper_check_modeset(struct drm_device *dev, > struct drm_atomic_state *state); > int drm_atomic_helper_check_plane_state(struct drm_plane_state *plane_state, > diff --git a/include/drm/drm_color_mgmt.h b/include/drm/drm_color_mgmt.h > index 81c298488b0c8..cb1bf361ad3e3 100644 > --- a/include/drm/drm_color_mgmt.h > +++ b/include/drm/drm_color_mgmt.h > @@ -94,12 +94,12 @@ int drm_plane_create_color_properties(struct drm_plane *plane, > enum drm_color_range default_range); > > /** > - * enum drm_color_lut_tests - hw-specific LUT tests to perform > + * enum drm_color_lut_channels_tests - hw-specific LUT tests to perform > * > * The drm_color_lut_check() function takes a bitmask of the values here to > * determine which tests to apply to a userspace-provided LUT. > */ > -enum drm_color_lut_tests { > +enum drm_color_lut_channels_tests { > /** > * @DRM_COLOR_LUT_EQUAL_CHANNELS: > * > @@ -119,5 +119,6 @@ enum drm_color_lut_tests { > DRM_COLOR_LUT_NON_DECREASING = BIT(1), > }; > > -int drm_color_lut_check(const struct drm_property_blob *lut, u32 tests); > +int drm_color_lut_channels_check(const struct drm_property_blob *lut, > + u32 tests); > #endif > diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h > index 2deb15d7e1610..cabd3ef1a6e32 100644 > --- a/include/drm/drm_crtc.h > +++ b/include/drm/drm_crtc.h > @@ -1072,6 +1072,17 @@ struct drm_crtc { > /** @funcs: CRTC control functions */ > const struct drm_crtc_funcs *funcs; > > + /** > + * @degamma_lut_size: Size of degamma LUT. > + */ > + uint32_t degamma_lut_size; > + > + /** > + * @gamma_lut_size: Size of Gamma LUT. Not used by legacy userspace such as > + * X, which doesn't support large lut sizes. > + */ > + uint32_t gamma_lut_size; > + > /** > * @gamma_size: Size of legacy gamma ramp reported to userspace. Set up > * by calling drm_mode_crtc_set_gamma_size(). > Acked-by: Paul Menzel Kind regards, Paul _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel 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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 21DCBC433F5 for ; Tue, 26 Oct 2021 12:11:56 +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 7236761156 for ; Tue, 26 Oct 2021 12:11:55 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 7236761156 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=molgen.mpg.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 37D5D6E42E; Tue, 26 Oct 2021 12:11:51 +0000 (UTC) X-Greylist: delayed 540 seconds by postgrey-1.36 at gabe; Tue, 26 Oct 2021 12:11:49 UTC Received: from mx1.molgen.mpg.de (mx3.molgen.mpg.de [141.14.17.11]) by gabe.freedesktop.org (Postfix) with ESMTPS id 9E4636E429; Tue, 26 Oct 2021 12:11:49 +0000 (UTC) Received: from [192.168.0.2] (ip5f5aef5c.dynamic.kabel-deutschland.de [95.90.239.92]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: pmenzel) by mx.molgen.mpg.de (Postfix) with ESMTPSA id 2724E61E64846; Tue, 26 Oct 2021 14:02:47 +0200 (CEST) Message-ID: Date: Tue, 26 Oct 2021 14:02:46 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.2.1 Content-Language: en-US To: Mark Yacoub Cc: seanpaul@chromium.org, harry.wentland@amd.com, Mark Yacoub , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Daniel Vetter , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Matthias Brugger , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, intel-gfx@lists.freedesktop.org References: <20210929194012.3433306-1-markyacoub@chromium.org> <20211013181228.1578201-1-markyacoub@chromium.org> From: Paul Menzel In-Reply-To: <20211013181228.1578201-1-markyacoub@chromium.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: [Intel-gfx] [PATCH 1/2] drm: Add Gamma and Degamma LUT sizes props to drm_crtc to validate. X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Dear Mark, Thank you for your patch. On 13.10.21 20:12, Mark Yacoub wrote: > From: Mark Yacoub > > [Why] > 1. drm_atomic_helper_check doesn't check for the LUT sizes of either Gamma > or Degamma props in the new CRTC state, allowing any invalid size to > be passed on. > 2. Each driver has its own LUT size, which could also be different for > legacy users. How can the problem be reproduced? > [How] > 1. Create |degamma_lut_size| and |gamma_lut_size| to save the LUT sizes > assigned by the driver when it's initializing its color and CTM > management. > 2. Create drm_atomic_helper_check_crtc which is called by > drm_atomic_helper_check to check the LUT sizes saved in drm_crtc that > they match the sizes in the new CRTC state. > 3. Rename older lut checks that test for the color channels to indicate > it's a channel check. It's not included in drm_atomic_helper_check_crtc > as it's hardware specific and is to be called by the driver. > 4. As the LUT size check now happens in drm_atomic_helper_check, remove > the lut check in intel_color.c > > Fixes: igt@kms_color@pipe-A-invalid-gamma-lut-sizes on MTK If I am not mistaken, the Fixes tag is used for commits I believe. Maybe use Resolves or something similar? > Tested on Zork(amdgpu) and Jacuzzi(mediatek), volteer(TGL) Please add a space before the (. How did you test this? > v1: > 1. Fix typos > 2. Remove the LUT size check from intel driver > 3. Rename old LUT check to indicate it's a channel change > > Signed-off-by: Mark Yacoub > --- > drivers/gpu/drm/drm_atomic_helper.c | 60 ++++++++++++++++++++++ > drivers/gpu/drm/drm_color_mgmt.c | 14 ++--- > drivers/gpu/drm/i915/display/intel_color.c | 14 ++--- > include/drm/drm_atomic_helper.h | 1 + > include/drm/drm_color_mgmt.h | 7 +-- > include/drm/drm_crtc.h | 11 ++++ > 6 files changed, 89 insertions(+), 18 deletions(-) > > diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c > index bc3487964fb5e..5feb2ad0209c3 100644 > --- a/drivers/gpu/drm/drm_atomic_helper.c > +++ b/drivers/gpu/drm/drm_atomic_helper.c > @@ -929,6 +929,62 @@ drm_atomic_helper_check_planes(struct drm_device *dev, > } > EXPORT_SYMBOL(drm_atomic_helper_check_planes); > > +/** > + * drm_atomic_helper_check_crtcs - validate state object for CRTC changes > + * @state: the driver state object > + * > + * Check the CRTC state object such as the Gamma/Degamma LUT sizes if the new > + * state holds them. > + * > + * RETURNS: > + * Zero for success or -errno > + */ > +int drm_atomic_helper_check_crtcs(struct drm_atomic_state *state) > +{ > + struct drm_crtc *crtc; > + struct drm_crtc_state *new_crtc_state; > + int i; > + > + for_each_new_crtc_in_state (state, crtc, new_crtc_state, i) { > + if (new_crtc_state->color_mgmt_changed && > + new_crtc_state->gamma_lut) { > + uint64_t supported_lut_size = crtc->gamma_lut_size; > + uint32_t supported_legacy_lut_size = crtc->gamma_size; > + uint32_t new_state_lut_size = > + drm_color_lut_size(new_crtc_state->gamma_lut); > + > + if (new_state_lut_size != supported_lut_size && > + new_state_lut_size != supported_legacy_lut_size) { > + drm_dbg_state( > + state->dev, > + "Invalid Gamma LUT size. Should be %u (or %u for legacy) but got %u.\n", > + supported_lut_size, > + supported_legacy_lut_size, > + new_state_lut_size); > + return -EINVAL; > + } > + } > + > + if (new_crtc_state->color_mgmt_changed && > + new_crtc_state->degamma_lut) { > + uint32_t new_state_lut_size = > + drm_color_lut_size(new_crtc_state->degamma_lut); > + uint64_t supported_lut_size = crtc->degamma_lut_size; > + > + if (new_state_lut_size != supported_lut_size) { > + drm_dbg_state( > + state->dev, > + "Invalid Degamma LUT size. Should be %u but got %u.\n", > + supported_lut_size, new_state_lut_size); > + return -EINVAL; > + } > + } > + } > + > + return 0; > +} > +EXPORT_SYMBOL(drm_atomic_helper_check_crtcs); > + > /** > * drm_atomic_helper_check - validate state object > * @dev: DRM device > @@ -974,6 +1030,10 @@ int drm_atomic_helper_check(struct drm_device *dev, > if (ret) > return ret; > > + ret = drm_atomic_helper_check_crtcs(state); > + if (ret) > + return ret; > + > if (state->legacy_cursor_update) > state->async_update = !drm_atomic_helper_async_check(dev, state); > > diff --git a/drivers/gpu/drm/drm_color_mgmt.c b/drivers/gpu/drm/drm_color_mgmt.c > index bb14f488c8f6c..e5b820ce823bf 100644 > --- a/drivers/gpu/drm/drm_color_mgmt.c > +++ b/drivers/gpu/drm/drm_color_mgmt.c > @@ -166,6 +166,7 @@ void drm_crtc_enable_color_mgmt(struct drm_crtc *crtc, > struct drm_mode_config *config = &dev->mode_config; > > if (degamma_lut_size) { > + crtc->degamma_lut_size = degamma_lut_size; > drm_object_attach_property(&crtc->base, > config->degamma_lut_property, 0); > drm_object_attach_property(&crtc->base, > @@ -178,6 +179,7 @@ void drm_crtc_enable_color_mgmt(struct drm_crtc *crtc, > config->ctm_property, 0); > > if (gamma_lut_size) { > + crtc->gamma_lut_size = gamma_lut_size; > drm_object_attach_property(&crtc->base, > config->gamma_lut_property, 0); > drm_object_attach_property(&crtc->base, > @@ -585,17 +587,17 @@ int drm_plane_create_color_properties(struct drm_plane *plane, > EXPORT_SYMBOL(drm_plane_create_color_properties); > > /** > - * drm_color_lut_check - check validity of lookup table > + * drm_color_lut_channels_check - check validity of the channels in the lookup table > * @lut: property blob containing LUT to check > * @tests: bitmask of tests to run > * > - * Helper to check whether a userspace-provided lookup table is valid and > - * satisfies hardware requirements. Drivers pass a bitmask indicating which of > - * the tests in &drm_color_lut_tests should be performed. > + * Helper to check whether each color channel of userspace-provided lookup table is valid and > + * satisfies hardware requirements. Drivers pass a bitmask indicating which of in > + * &drm_color_lut_channels_tests should be performed. > * > * Returns 0 on success, -EINVAL on failure. > */ > -int drm_color_lut_check(const struct drm_property_blob *lut, u32 tests) > +int drm_color_lut_channels_check(const struct drm_property_blob *lut, u32 tests) > { > const struct drm_color_lut *entry; > int i; > @@ -625,4 +627,4 @@ int drm_color_lut_check(const struct drm_property_blob *lut, u32 tests) > > return 0; > } > -EXPORT_SYMBOL(drm_color_lut_check); > +EXPORT_SYMBOL(drm_color_lut_channels_check); > diff --git a/drivers/gpu/drm/i915/display/intel_color.c b/drivers/gpu/drm/i915/display/intel_color.c > index dab892d2251ba..a308fe52746ac 100644 > --- a/drivers/gpu/drm/i915/display/intel_color.c > +++ b/drivers/gpu/drm/i915/display/intel_color.c > @@ -1285,7 +1285,7 @@ static int check_luts(const struct intel_crtc_state *crtc_state) > const struct drm_property_blob *gamma_lut = crtc_state->hw.gamma_lut; > const struct drm_property_blob *degamma_lut = crtc_state->hw.degamma_lut; > int gamma_length, degamma_length; > - u32 gamma_tests, degamma_tests; > + u32 gamma_channels_tests, degamma_channels_tests; > > /* Always allow legacy gamma LUT with no further checking. */ > if (crtc_state_is_legacy_gamma(crtc_state)) > @@ -1300,15 +1300,11 @@ static int check_luts(const struct intel_crtc_state *crtc_state) > > degamma_length = INTEL_INFO(dev_priv)->color.degamma_lut_size; > gamma_length = INTEL_INFO(dev_priv)->color.gamma_lut_size; > - degamma_tests = INTEL_INFO(dev_priv)->color.degamma_lut_tests; > - gamma_tests = INTEL_INFO(dev_priv)->color.gamma_lut_tests; > + degamma_channels_tests = INTEL_INFO(dev_priv)->color.degamma_lut_tests; > + gamma_channels_tests = INTEL_INFO(dev_priv)->color.gamma_lut_tests; > > - if (check_lut_size(degamma_lut, degamma_length) || > - check_lut_size(gamma_lut, gamma_length)) > - return -EINVAL; > - > - if (drm_color_lut_check(degamma_lut, degamma_tests) || > - drm_color_lut_check(gamma_lut, gamma_tests)) > + if (drm_color_lut_channels_check(degamma_lut, degamma_channels_tests) || > + drm_color_lut_channels_check(gamma_lut, gamma_channels_tests)) > return -EINVAL; > > return 0; > diff --git a/include/drm/drm_atomic_helper.h b/include/drm/drm_atomic_helper.h > index 4045e2507e11c..a22d32a7a8719 100644 > --- a/include/drm/drm_atomic_helper.h > +++ b/include/drm/drm_atomic_helper.h > @@ -38,6 +38,7 @@ struct drm_atomic_state; > struct drm_private_obj; > struct drm_private_state; > > +int drm_atomic_helper_check_crtcs(struct drm_atomic_state *state); > int drm_atomic_helper_check_modeset(struct drm_device *dev, > struct drm_atomic_state *state); > int drm_atomic_helper_check_plane_state(struct drm_plane_state *plane_state, > diff --git a/include/drm/drm_color_mgmt.h b/include/drm/drm_color_mgmt.h > index 81c298488b0c8..cb1bf361ad3e3 100644 > --- a/include/drm/drm_color_mgmt.h > +++ b/include/drm/drm_color_mgmt.h > @@ -94,12 +94,12 @@ int drm_plane_create_color_properties(struct drm_plane *plane, > enum drm_color_range default_range); > > /** > - * enum drm_color_lut_tests - hw-specific LUT tests to perform > + * enum drm_color_lut_channels_tests - hw-specific LUT tests to perform > * > * The drm_color_lut_check() function takes a bitmask of the values here to > * determine which tests to apply to a userspace-provided LUT. > */ > -enum drm_color_lut_tests { > +enum drm_color_lut_channels_tests { > /** > * @DRM_COLOR_LUT_EQUAL_CHANNELS: > * > @@ -119,5 +119,6 @@ enum drm_color_lut_tests { > DRM_COLOR_LUT_NON_DECREASING = BIT(1), > }; > > -int drm_color_lut_check(const struct drm_property_blob *lut, u32 tests); > +int drm_color_lut_channels_check(const struct drm_property_blob *lut, > + u32 tests); > #endif > diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h > index 2deb15d7e1610..cabd3ef1a6e32 100644 > --- a/include/drm/drm_crtc.h > +++ b/include/drm/drm_crtc.h > @@ -1072,6 +1072,17 @@ struct drm_crtc { > /** @funcs: CRTC control functions */ > const struct drm_crtc_funcs *funcs; > > + /** > + * @degamma_lut_size: Size of degamma LUT. > + */ > + uint32_t degamma_lut_size; > + > + /** > + * @gamma_lut_size: Size of Gamma LUT. Not used by legacy userspace such as > + * X, which doesn't support large lut sizes. > + */ > + uint32_t gamma_lut_size; > + > /** > * @gamma_size: Size of legacy gamma ramp reported to userspace. Set up > * by calling drm_mode_crtc_set_gamma_size(). > Acked-by: Paul Menzel Kind regards, Paul