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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id C1AEEC433F5 for ; Tue, 4 Oct 2022 13:39:46 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id D479E10E5FE; Tue, 4 Oct 2022 13:39:45 +0000 (UTC) Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by gabe.freedesktop.org (Postfix) with ESMTPS id 44D0C10E5FE for ; Tue, 4 Oct 2022 13:39:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1664890783; x=1696426783; h=date:from:to:cc:subject:message-id:references: mime-version:content-transfer-encoding:in-reply-to; bh=hbPn/7R/Qmf9KFnMDfkI3ChGwnyYizujkC1rcN32IGs=; b=ng15USKfO2jtm+VIoSyeLiLAvh13cPAVA8YNz2ngHIPHGRz12mHsI29v SwlUUydlv6M38YkdVi8gXfsTt9ASPkzBrQgp9SqQ9k1DoMoNYAWb/J+Wo 9kIt1fa+hj1QXQbxQENt1LVsw9iFceqk1ijnb6b3GkL+tn/X/36phqIFZ u0fzXdvHKGAsuBwiekyVbk+BiJBwdJJR9//Fa6B99CzwZ0FMRcsKZlApo ifew6fWHaXXdkNFVWL/9SDc1FhHZQVnYa1MiCWC7RFy6b1bR9VJX61tOY v5IoA5RC/zmIE7cPdd6mMOVM0si2jPK2mKkDronLgynUovxweXkS56BYS A==; X-IronPort-AV: E=McAfee;i="6500,9779,10490"; a="283277237" X-IronPort-AV: E=Sophos;i="5.95,158,1661842800"; d="scan'208";a="283277237" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 Oct 2022 06:39:42 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6500,9779,10490"; a="713012611" X-IronPort-AV: E=Sophos;i="5.95,158,1661842800"; d="scan'208";a="713012611" Received: from stinkpipe.fi.intel.com (HELO stinkbox) ([10.237.72.191]) by FMSMGA003.fm.intel.com with SMTP; 04 Oct 2022 06:39:40 -0700 Received: by stinkbox (sSMTP sendmail emulation); Tue, 04 Oct 2022 16:39:39 +0300 Date: Tue, 4 Oct 2022 16:39:39 +0300 From: Ville =?iso-8859-1?Q?Syrj=E4l=E4?= To: Matthew Auld Message-ID: References: <20221004131916.233474-1-matthew.auld@intel.com> <20221004131916.233474-4-matthew.auld@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20221004131916.233474-4-matthew.auld@intel.com> X-Patchwork-Hint: comment Subject: Re: [Intel-gfx] [PATCH v5 4/5] drm/i915/display: consider DG2_RC_CCS_CC when migrating buffers 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: intel-gfx@lists.freedesktop.org, Nirmoy Das , Jianshui Yu Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" On Tue, Oct 04, 2022 at 02:19:15PM +0100, Matthew Auld wrote: > For these types of display buffers, we need to able to CPU access some > part of the backing memory in prepare_plane_clear_colors(). As a result > we need to ensure we always place in the mappable part of lmem, which > becomes necessary on small-bar systems. > > v2(Nirmoy & Ville): > - Add some commentary for why we need to CPU access the buffer. > - Split out the other changes, so we just consider the display change > here. > v3: > - Handle this in the dpt path. > v4(Ville): > - Drop the intel_fb_rc_ccs_cc_plane() sanity check in > pin_and_fence_fb_obj(), since we can also trigger this on DG1 it > seems. On some hw I think there was also a chicken bit to disable DPT, and the DPT simulation situation was always a mess (you had to enable it using some custom config). So in theory someone might have the need to use the non-DPT path on more modern hw as well, but I'm OK not considering it here. If someone thinks that small-bar+no-DPT is important they can deal with it in a separate patch. Reviewed-by: Ville Syrjälä > > Fixes: eb1c535f0d69 ("drm/i915: turn on small BAR support") > Reported-by: Jianshui Yu > Signed-off-by: Matthew Auld > Cc: Ville Syrjälä > Cc: Nirmoy Das > --- > drivers/gpu/drm/i915/display/intel_fb_pin.c | 13 ++++++++++++- > 1 file changed, 12 insertions(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/i915/display/intel_fb_pin.c b/drivers/gpu/drm/i915/display/intel_fb_pin.c > index 5031ee5695dd..e12339f46640 100644 > --- a/drivers/gpu/drm/i915/display/intel_fb_pin.c > +++ b/drivers/gpu/drm/i915/display/intel_fb_pin.c > @@ -50,7 +50,18 @@ intel_pin_fb_obj_dpt(struct drm_framebuffer *fb, > continue; > > if (HAS_LMEM(dev_priv)) { > - ret = i915_gem_object_migrate(obj, &ww, INTEL_REGION_LMEM_0); > + unsigned int flags = obj->flags; > + > + /* > + * For this type of buffer we need to able to read from the CPU > + * the clear color value found in the buffer, hence we need to > + * ensure it is always in the mappable part of lmem, if this is > + * a small-bar device. > + */ > + if (intel_fb_rc_ccs_cc_plane(fb) >= 0) > + flags &= ~I915_BO_ALLOC_GPU_ONLY; > + ret = __i915_gem_object_migrate(obj, &ww, INTEL_REGION_LMEM_0, > + flags); > if (ret) > continue; > } > -- > 2.37.3 -- Ville Syrjälä Intel