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=-8.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_SANE_1 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 2DCDAC2D0B1 for ; Thu, 6 Feb 2020 13:46:19 +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 09E7A21775 for ; Thu, 6 Feb 2020 13:46:18 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 09E7A21775 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 880D46FA41; Thu, 6 Feb 2020 13:46:18 +0000 (UTC) Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) by gabe.freedesktop.org (Postfix) with ESMTPS id E65696FA41 for ; Thu, 6 Feb 2020 13:46:16 +0000 (UTC) X-Amp-Result: UNKNOWN X-Amp-Original-Verdict: FILE UNKNOWN X-Amp-File-Uploaded: False Received: from orsmga007.jf.intel.com ([10.7.209.58]) by fmsmga106.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 06 Feb 2020 05:46:16 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,409,1574150400"; d="scan'208";a="220445656" Received: from stinkbox.fi.intel.com (HELO stinkbox) ([10.237.72.174]) by orsmga007.jf.intel.com with SMTP; 06 Feb 2020 05:46:13 -0800 Received: by stinkbox (sSMTP sendmail emulation); Thu, 06 Feb 2020 15:46:13 +0200 Date: Thu, 6 Feb 2020 15:46:13 +0200 From: Ville =?iso-8859-1?Q?Syrj=E4l=E4?= To: =?iso-8859-1?Q?Jos=E9?= Roberto de Souza Message-ID: <20200206134613.GR13686@intel.com> References: <20200206020851.337897-1-jose.souza@intel.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20200206020851.337897-1-jose.souza@intel.com> X-Patchwork-Hint: comment User-Agent: Mutt/1.10.1 (2018-07-13) Subject: Re: [Intel-gfx] [PATCH v2 1/3] drm/i915/display/fbc: Make fences a nice-to-have for GEN11+ 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: , Cc: Daniel Vetter , intel-gfx@lists.freedesktop.org, Dhinakaran Pandiyan Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" On Wed, Feb 05, 2020 at 06:08:49PM -0800, Jos=E9 Roberto de Souza wrote: > dGFX have local memory so it do not have aperture and do not support > CPU fences but even for iGFX it have a small number of fences. > = > As replacement for fences to track frontbuffer modifications by CPU > we have a software tracking that is already in used by FBC and PSR. > PSR don't support fences so it shows that this tracking is reliable. > = > So lets make fences a nice-to-have to activate FBC for GEN11+, this > will allow us to enable FBC for dGFXs and iGFXs even when there is no > available fence. > = > We do not set fences to rotated planes but FBC only have restrictions > against 16bpp, so adding it here. > = > Also adding a new check for the tiling format, fences are only set > to X and Y tiled planes but again FBC don't have any restrictions > against tiling so adding linear as supported as well, other formats > should be added after tested but IGT only supports drawing in thse > 3 formats. > = > intel_fbc_hw_tracking_covers_screen() maybe can also have the same > treatment as fences but BSpec is not clear if the size limitation is > for hardware tracking or general use of FBC and I don't have a 5K > display to test it, so keeping as is for safety. > = > v2: > - Added tiling and pixel format rotation checks > - Changed the GEN version not requiring fences to 11 from 9, DDX > needs some changes but it don't have support for GEN11+ It's already borked, so shouldn't actually make any difference. So IMO just make it gen9+. > = > Cc: Daniel Vetter > Cc: Dhinakaran Pandiyan > Cc: Ville Syrj=E4l=E4 > Signed-off-by: Jos=E9 Roberto de Souza > --- > drivers/gpu/drm/i915/display/intel_fbc.c | 42 ++++++++++++++++++++---- > drivers/gpu/drm/i915/i915_drv.h | 1 + > 2 files changed, 36 insertions(+), 7 deletions(-) > = > diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i= 915/display/intel_fbc.c > index ddf8d3bb7a7d..3a9e41e93ebf 100644 > --- a/drivers/gpu/drm/i915/display/intel_fbc.c > +++ b/drivers/gpu/drm/i915/display/intel_fbc.c > @@ -585,7 +585,7 @@ static bool stride_is_valid(struct drm_i915_private *= dev_priv, > } > = > static bool pixel_format_is_valid(struct drm_i915_private *dev_priv, > - u32 pixel_format) > + u32 pixel_format, unsigned int rotation) > { > switch (pixel_format) { > case DRM_FORMAT_XRGB8888: > @@ -599,6 +599,9 @@ static bool pixel_format_is_valid(struct drm_i915_pri= vate *dev_priv, > /* WaFbcOnly1to1Ratio:ctg */ > if (IS_G4X(dev_priv)) > return false; > + if ((rotation & (DRM_MODE_ROTATE_90 | DRM_MODE_ROTATE_270)) && There is a function for that. Also wrong place for the check. > + INTEL_GEN(dev_priv) >=3D 9) Pointless gen check. Older hw doesn't do 90/270 degree rotation anyway. I *think* it should actually be possible to use FBC with 90/270 degree rotation. The only complication was the host tracking but if we don't think we need it anwyay then rotation also should work. But that is material for a followup. > + return false; > return true; > default: > return false; > @@ -639,6 +642,18 @@ static bool intel_fbc_hw_tracking_covers_screen(stru= ct intel_crtc *crtc) > return effective_w <=3D max_w && effective_h <=3D max_h; > } > = > +static bool tiling_is_valid(uint64_t modifier) > +{ > + switch (modifier) { > + case DRM_FORMAT_MOD_LINEAR: > + case I915_FORMAT_MOD_X_TILED: > + case I915_FORMAT_MOD_Y_TILED: > + return true; There should be a gen check here. > + default: > + return false; > + } > +} > + > static void intel_fbc_update_state_cache(struct intel_crtc *crtc, > const struct intel_crtc_state *crtc_state, > const struct intel_plane_state *plane_state) > @@ -672,6 +687,7 @@ static void intel_fbc_update_state_cache(struct intel= _crtc *crtc, > = > cache->fb.format =3D fb->format; > cache->fb.stride =3D fb->pitches[0]; > + cache->fb.modifier =3D fb->modifier; > = > drm_WARN_ON(&dev_priv->drm, plane_state->flags & PLANE_HAS_FENCE && > !plane_state->vma->fence); > @@ -720,23 +736,34 @@ static bool intel_fbc_can_activate(struct intel_crt= c *crtc) > return false; > } > = > - /* The use of a CPU fence is mandatory in order to detect writes > - * by the CPU to the scanout and trigger updates to the FBC. > + /* The use of a CPU fence is one of two ways to detect writes by the > + * CPU to the scanout and trigger updates to the FBC. > + * > + * The other method is by software tracking(see > + * intel_fbc_invalidate/flush()), it will manually notify FBC and nuke > + * the current compressed buffer and recompress it. > * > * Note that is possible for a tiled surface to be unmappable (and > - * so have no fence associated with it) due to aperture constaints > + * so have no fence associated with it) due to aperture constraints > * at the time of pinning. > * > * FIXME with 90/270 degree rotation we should use the fence on > * the normal GTT view (the rotated view doesn't even have a > * fence). Would need changes to the FBC fence Y offset as well. > - * For now this will effecively disable FBC with 90/270 degree > + * For now this will effectively disable FBC with 90/270 degree > * rotation. > */ > - if (cache->fence_id < 0) { > + if (INTEL_GEN(dev_priv) < 11 && cache->fence_id < 0) { > fbc->no_fbc_reason =3D "framebuffer not tiled or fenced"; > return false; > } > + > + /* Only check tiling for platforms that fence is not mandatory */ > + if (INTEL_GEN(dev_priv) >=3D 11 && !tiling_is_valid(cache->fb.modifier)= ) { > + fbc->no_fbc_reason =3D "tiling unsupported"; > + return false; > + } > + > if (INTEL_GEN(dev_priv) <=3D 4 && !IS_G4X(dev_priv) && > cache->plane.rotation !=3D DRM_MODE_ROTATE_0) { > fbc->no_fbc_reason =3D "rotation unsupported"; > @@ -748,7 +775,8 @@ static bool intel_fbc_can_activate(struct intel_crtc = *crtc) > return false; > } > = > - if (!pixel_format_is_valid(dev_priv, cache->fb.format->format)) { > + if (!pixel_format_is_valid(dev_priv, cache->fb.format->format, > + cache->plane.rotation)) { > fbc->no_fbc_reason =3D "pixel format is invalid"; > return false; > } > diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_= drv.h > index 3452926d7b77..a481a0454e69 100644 > --- a/drivers/gpu/drm/i915/i915_drv.h > +++ b/drivers/gpu/drm/i915/i915_drv.h > @@ -413,6 +413,7 @@ struct intel_fbc { > struct { > const struct drm_format_info *format; > unsigned int stride; > + uint64_t modifier; > } fb; > u16 gen9_wa_cfb_stride; > s8 fence_id; > -- = > 2.25.0 -- = Ville Syrj=E4l=E4 Intel _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx