From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [134.134.136.126]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A1AB734558 for ; Fri, 15 Dec 2023 11:17:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="Z066T/hi" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1702639075; x=1734175075; h=date:from:to:cc:subject:message-id:references: mime-version:content-transfer-encoding:in-reply-to; bh=CABde8yKJe0Cl0xxR+1vVQSnkZhyPhpDfbH3OaB8c5U=; b=Z066T/hi0C7Y0EiS0f1/BpaW66AwNppwxBi1k5M8pywPABsAzI0EQ+Wl gdlvgu1HgYZtmRHHLoDjtM90jYukqcuwGReW+HtMjYTOdCmjJYSmu5FYG 3JE00SJcDl3uuq/a/5bkWABC4T3fOZUy4tvLKHFIAVC8XRYKbdfllOHNY cL+r6szK0AQooiNHlSmkoc8Todq3KqFydABevLDWSsWKp/XkFHqZMwJdS qDtrBs9Pgfg12/eUwnFdTHhW52bz+2QfFuqzm0ht+J6dRRbOWvIAli5dJ G4eD8THBnhNouKgmtFmaTKP0OSHVWsNExelLiS3TFWqdcMBFSW7hdFqmh Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10924"; a="380258271" X-IronPort-AV: E=Sophos;i="6.04,278,1695711600"; d="scan'208";a="380258271" Received: from orsmga007.jf.intel.com ([10.7.209.58]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Dec 2023 03:17:48 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10924"; a="767948148" X-IronPort-AV: E=Sophos;i="6.04,278,1695711600"; d="scan'208";a="767948148" Received: from stinkpipe.fi.intel.com (HELO stinkbox) ([10.237.72.74]) by orsmga007.jf.intel.com with SMTP; 15 Dec 2023 03:17:46 -0800 Received: by stinkbox (sSMTP sendmail emulation); Fri, 15 Dec 2023 13:17:45 +0200 Date: Fri, 15 Dec 2023 13:17:45 +0200 From: Ville =?iso-8859-1?Q?Syrj=E4l=E4?= To: "Lisovskiy, Stanislav" Cc: intel-gfx@lists.freedesktop.org, stable@vger.kernel.org Subject: Re: [PATCH] drm/i915: Reject async flips with bigjoiner Message-ID: References: <20231211081134.2698-1-ville.syrjala@linux.intel.com> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: X-Patchwork-Hint: comment On Wed, Dec 13, 2023 at 08:36:49PM +0200, Lisovskiy, Stanislav wrote: > On Mon, Dec 11, 2023 at 10:11:34AM +0200, Ville Syrjala wrote: > > From: Ville Syrjälä > > > > Currently async flips are busted when bigjoiner is in use. > > As a short term fix simply reject async flips in that case. > > > > Cc: stable@vger.kernel.org > > Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/9769 > > Signed-off-by: Ville Syrjälä > > --- > > drivers/gpu/drm/i915/display/intel_display.c | 11 +++++++++++ > > 1 file changed, 11 insertions(+) > > > > diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c > > index d955957b7d18..61053c19f4cc 100644 > > --- a/drivers/gpu/drm/i915/display/intel_display.c > > +++ b/drivers/gpu/drm/i915/display/intel_display.c > > @@ -5926,6 +5926,17 @@ static int intel_async_flip_check_uapi(struct intel_atomic_state *state, > > return -EINVAL; > > } > > > > + /* > > + * FIXME: Bigjoiner+async flip is busted currently. > > + * Remove this check once the issues are fixed. > > + */ > > + if (new_crtc_state->bigjoiner_pipes) { > > + drm_dbg_kms(&i915->drm, > > + "[CRTC:%d:%s] async flip disallowed with bigjoiner\n", > > + crtc->base.base.id, crtc->base.name); > > + return -EINVAL; > > + } > > + > > Was recently wondering, whether should we add some kind of helper > func for that check to look more readable, i.e instead of just > checking if crtc_state->bigjoiner_pipes != 0, call smth like > is_bigjoiner_used(new_crtc_state).. I suppose we could have something like that. We do have something along those lines for eg. port sync. The difference being that port sync has a bit more state than a single bitmask, so it's more useful there. > > Reviewed-by: Stanislav Lisovskiy > Thanks. > > for_each_oldnew_intel_plane_in_state(state, plane, old_plane_state, > > new_plane_state, i) { > > if (plane->pipe != crtc->pipe) > > -- > > 2.41.0 > > -- Ville Syrjälä Intel