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[23.128.96.18]) by mx.google.com with ESMTP id b1si1557967pjn.99.2022.01.24.06.30.27; Mon, 24 Jan 2022 06:30:40 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass (test mode) header.i=@ideasonboard.com header.s=mail header.b=gVEbTj6r; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234525AbiAWWvT (ORCPT + 99 others); Sun, 23 Jan 2022 17:51:19 -0500 Received: from perceval.ideasonboard.com ([213.167.242.64]:47412 "EHLO perceval.ideasonboard.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231200AbiAWWvR (ORCPT ); Sun, 23 Jan 2022 17:51:17 -0500 Received: from pendragon.ideasonboard.com (62-78-145-57.bb.dnainternet.fi [62.78.145.57]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id CF423D41; Sun, 23 Jan 2022 23:51:15 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1642978276; bh=RRjpVXywM63nymcBmncfahaGb2Te7+lQvhrYzpBwj2g=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=gVEbTj6rALeTZrlFVt1jrhoSpOWD4PGzQz77rQqkon68tIfvZzK4cM+93mbQqn0Dh HWo0ol5dC0Kytut7oru7tkmcs+Dnlz1uonutvCFqsqOird8QeeIgqLpR1t0EkqLYFx Pg8BWsw0Mxrqu2C+c7mfGWTtytvDqUSzVwgb5bhY= Date: Mon, 24 Jan 2022 00:50:59 +0200 From: Laurent Pinchart To: Tomohito Esaki Cc: dri-devel@lists.freedesktop.org, Alex Deucher , Christian =?utf-8?B?S8O2bmln?= , "Pan, Xinhui" , David Airlie , Daniel Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Ben Skeggs , Michel =?utf-8?Q?D=C3=A4nzer?= , Simon Ser , Qingqing Zhuo , Bas Nieuwenhuizen , Mark Yacoub , Sean Paul , Evan Quan , Andy Shevchenko , Petr Mladek , Sakari Ailus , Lee Jones , Abhinav Kumar , Dmitry Baryshkov , Rob Clark , amd-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org, nouveau@lists.freedesktop.org, Daniel Stone , Damian Hobson-Garcia , Takanari Hayama Subject: Re: [RFC PATCH v3 1/3] drm: introduce fb_modifiers_not_supported flag in mode_config Message-ID: References: <20220114101753.24996-1-etom@igel.co.jp> <20220114101753.24996-2-etom@igel.co.jp> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20220114101753.24996-2-etom@igel.co.jp> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello Esaki-san, On Fri, Jan 14, 2022 at 07:17:51PM +0900, Tomohito Esaki wrote: > If only linear modifier is advertised, since there are many drivers that > only linear supported, the DRM core should handle this rather than > open-coding in every driver. However, there are legacy drivers such as > radeon that do not support modifiers but infer the actual layout of the > underlying buffer. Therefore, a new flag fb_modifiers_not_supported is > introduced for these legacy drivers, and allow_fb_modifiers is replaced > with this new flag. > > Signed-off-by: Tomohito Esaki > --- > drivers/gpu/drm/amd/amdgpu/amdgpu_display.c | 6 +++--- > drivers/gpu/drm/amd/amdgpu/dce_v10_0.c | 2 ++ > drivers/gpu/drm/amd/amdgpu/dce_v11_0.c | 2 ++ > drivers/gpu/drm/amd/amdgpu/dce_v6_0.c | 1 + > drivers/gpu/drm/amd/amdgpu/dce_v8_0.c | 2 ++ > drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 3 +++ > drivers/gpu/drm/drm_framebuffer.c | 6 +++--- > drivers/gpu/drm/drm_ioctl.c | 2 +- > drivers/gpu/drm/nouveau/nouveau_display.c | 6 ++++-- > drivers/gpu/drm/radeon/radeon_display.c | 2 ++ > include/drm/drm_mode_config.h | 10 ++++++++++ > 11 files changed, 33 insertions(+), 9 deletions(-) > > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c > index 82011e75ed85..edbb30d47b8c 100644 > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c > @@ -954,7 +954,7 @@ static int amdgpu_display_verify_sizes(struct amdgpu_framebuffer *rfb) > int ret; > unsigned int i, block_width, block_height, block_size_log2; > > - if (!rfb->base.dev->mode_config.allow_fb_modifiers) > + if (rfb->base.dev->mode_config.fb_modifiers_not_supported) > return 0; > > for (i = 0; i < format_info->num_planes; ++i) { > @@ -1141,7 +1141,7 @@ int amdgpu_display_framebuffer_init(struct drm_device *dev, > if (ret) > return ret; > > - if (!dev->mode_config.allow_fb_modifiers) { > + if (dev->mode_config.fb_modifiers_not_supported) { > drm_WARN_ONCE(dev, adev->family >= AMDGPU_FAMILY_AI, > "GFX9+ requires FB check based on format modifier\n"); > ret = check_tiling_flags_gfx6(rfb); > @@ -1149,7 +1149,7 @@ int amdgpu_display_framebuffer_init(struct drm_device *dev, > return ret; > } > > - if (dev->mode_config.allow_fb_modifiers && > + if (!dev->mode_config.fb_modifiers_not_supported && > !(rfb->base.flags & DRM_MODE_FB_MODIFIERS)) { > ret = convert_tiling_flags_to_modifier(rfb); > if (ret) { > diff --git a/drivers/gpu/drm/amd/amdgpu/dce_v10_0.c b/drivers/gpu/drm/amd/amdgpu/dce_v10_0.c > index d1570a462a51..fb61c0814115 100644 > --- a/drivers/gpu/drm/amd/amdgpu/dce_v10_0.c > +++ b/drivers/gpu/drm/amd/amdgpu/dce_v10_0.c > @@ -2798,6 +2798,8 @@ static int dce_v10_0_sw_init(void *handle) > adev_to_drm(adev)->mode_config.preferred_depth = 24; > adev_to_drm(adev)->mode_config.prefer_shadow = 1; > > + adev_to_drm(adev)->mode_config.fb_modifiers_not_supported = true; > + > adev_to_drm(adev)->mode_config.fb_base = adev->gmc.aper_base; > > r = amdgpu_display_modeset_create_props(adev); > diff --git a/drivers/gpu/drm/amd/amdgpu/dce_v11_0.c b/drivers/gpu/drm/amd/amdgpu/dce_v11_0.c > index 18a7b3bd633b..17942a11366d 100644 > --- a/drivers/gpu/drm/amd/amdgpu/dce_v11_0.c > +++ b/drivers/gpu/drm/amd/amdgpu/dce_v11_0.c > @@ -2916,6 +2916,8 @@ static int dce_v11_0_sw_init(void *handle) > adev_to_drm(adev)->mode_config.preferred_depth = 24; > adev_to_drm(adev)->mode_config.prefer_shadow = 1; > > + adev_to_drm(adev)->mode_config.fb_modifiers_not_supported = true; > + > adev_to_drm(adev)->mode_config.fb_base = adev->gmc.aper_base; > > r = amdgpu_display_modeset_create_props(adev); > diff --git a/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c b/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c > index c7803dc2b2d5..2ec99ec8e1a3 100644 > --- a/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c > +++ b/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c > @@ -2674,6 +2674,7 @@ static int dce_v6_0_sw_init(void *handle) > adev_to_drm(adev)->mode_config.max_height = 16384; > adev_to_drm(adev)->mode_config.preferred_depth = 24; > adev_to_drm(adev)->mode_config.prefer_shadow = 1; > + adev_to_drm(adev)->mode_config.fb_modifiers_not_supported = true; > adev_to_drm(adev)->mode_config.fb_base = adev->gmc.aper_base; > > r = amdgpu_display_modeset_create_props(adev); > diff --git a/drivers/gpu/drm/amd/amdgpu/dce_v8_0.c b/drivers/gpu/drm/amd/amdgpu/dce_v8_0.c > index 8318ee8339f1..de11fbe5aba2 100644 > --- a/drivers/gpu/drm/amd/amdgpu/dce_v8_0.c > +++ b/drivers/gpu/drm/amd/amdgpu/dce_v8_0.c > @@ -2695,6 +2695,8 @@ static int dce_v8_0_sw_init(void *handle) > adev_to_drm(adev)->mode_config.preferred_depth = 24; > adev_to_drm(adev)->mode_config.prefer_shadow = 1; > > + adev_to_drm(adev)->mode_config.fb_modifiers_not_supported = true; > + > adev_to_drm(adev)->mode_config.fb_base = adev->gmc.aper_base; > > r = amdgpu_display_modeset_create_props(adev); > diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c > index 2f0b14f8f833..61cb41766fae 100644 > --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c > +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c > @@ -7868,6 +7868,9 @@ static int amdgpu_dm_plane_init(struct amdgpu_display_manager *dm, > if (res) > return res; > > + if (modifiers == NULL) > + adev_to_drm(dm->adev)->mode_config.fb_modifiers_not_supported = true; > + > res = drm_universal_plane_init(adev_to_drm(dm->adev), plane, possible_crtcs, > &dm_plane_funcs, formats, num_formats, > modifiers, plane->type, NULL); > diff --git a/drivers/gpu/drm/drm_framebuffer.c b/drivers/gpu/drm/drm_framebuffer.c > index 07f5abc875e9..4562a8b86579 100644 > --- a/drivers/gpu/drm/drm_framebuffer.c > +++ b/drivers/gpu/drm/drm_framebuffer.c > @@ -309,7 +309,7 @@ drm_internal_framebuffer_create(struct drm_device *dev, > } > > if (r->flags & DRM_MODE_FB_MODIFIERS && > - !dev->mode_config.allow_fb_modifiers) { > + dev->mode_config.fb_modifiers_not_supported) { > DRM_DEBUG_KMS("driver does not support fb modifiers\n"); > return ERR_PTR(-EINVAL); > } > @@ -594,7 +594,7 @@ int drm_mode_getfb2_ioctl(struct drm_device *dev, > r->pixel_format = fb->format->format; > > r->flags = 0; > - if (dev->mode_config.allow_fb_modifiers) > + if (!dev->mode_config.fb_modifiers_not_supported) > r->flags |= DRM_MODE_FB_MODIFIERS; > > for (i = 0; i < ARRAY_SIZE(r->handles); i++) { > @@ -607,7 +607,7 @@ int drm_mode_getfb2_ioctl(struct drm_device *dev, > for (i = 0; i < fb->format->num_planes; i++) { > r->pitches[i] = fb->pitches[i]; > r->offsets[i] = fb->offsets[i]; > - if (dev->mode_config.allow_fb_modifiers) > + if (!dev->mode_config.fb_modifiers_not_supported) > r->modifier[i] = fb->modifier; > } > > diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c > index 8b8744dcf691..51fcf1298023 100644 > --- a/drivers/gpu/drm/drm_ioctl.c > +++ b/drivers/gpu/drm/drm_ioctl.c > @@ -297,7 +297,7 @@ static int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_ > req->value = 64; > break; > case DRM_CAP_ADDFB2_MODIFIERS: > - req->value = dev->mode_config.allow_fb_modifiers; > + req->value = !dev->mode_config.fb_modifiers_not_supported; > break; > case DRM_CAP_CRTC_IN_VBLANK_EVENT: > req->value = 1; > diff --git a/drivers/gpu/drm/nouveau/nouveau_display.c b/drivers/gpu/drm/nouveau/nouveau_display.c > index 2b460835a438..2cd0932b3d68 100644 > --- a/drivers/gpu/drm/nouveau/nouveau_display.c > +++ b/drivers/gpu/drm/nouveau/nouveau_display.c > @@ -708,10 +708,12 @@ nouveau_display_create(struct drm_device *dev) > &disp->disp); > if (ret == 0) { > nouveau_display_create_properties(dev); > - if (disp->disp.object.oclass < NV50_DISP) > + if (disp->disp.object.oclass < NV50_DISP) { > + dev->mode_config.fb_modifiers_not_supported = true; > ret = nv04_display_create(dev); > - else > + } else { > ret = nv50_display_create(dev); > + } > } > } else { > ret = 0; > diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c > index 573154268d43..b9a07677a71e 100644 > --- a/drivers/gpu/drm/radeon/radeon_display.c > +++ b/drivers/gpu/drm/radeon/radeon_display.c > @@ -1596,6 +1596,8 @@ int radeon_modeset_init(struct radeon_device *rdev) > rdev->ddev->mode_config.preferred_depth = 24; > rdev->ddev->mode_config.prefer_shadow = 1; > > + rdev->ddev->mode_config.fb_modifiers_not_supported = true; > + > rdev->ddev->mode_config.fb_base = rdev->mc.aper_base; > > ret = radeon_modeset_create_props(rdev); > diff --git a/include/drm/drm_mode_config.h b/include/drm/drm_mode_config.h > index 91ca575a78de..da82f45351c7 100644 > --- a/include/drm/drm_mode_config.h > +++ b/include/drm/drm_mode_config.h > @@ -933,6 +933,16 @@ struct drm_mode_config { > */ > bool allow_fb_modifiers; > > + /** > + * @fb_modifiers_not_supported: > + * > + * This flag is for legacy drivers such as radeon that do not support > + * modifiers but infer the actual layout of the underlying buffer. > + * Generally, each drivers must support modifiers, this flag should not > + * be set. I'd write it a bit differently, to explain what the flag does: * When this flag is set, the DRM device will not expose modifier * support to userspace. This is only used by legacy drivers (such as * radeon) that infer the buffer layout through heuristics without using * modifiers. New drivers shall not set fhis flag. Reviewed-by: Laurent Pinchart > + */ > + bool fb_modifiers_not_supported; > + > /** > * @normalize_zpos: > * -- Regards, Laurent Pinchart