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=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 40371C433F5 for ; Fri, 24 Sep 2021 02:26:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2C088610F7 for ; Fri, 24 Sep 2021 02:26:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243915AbhIXC1e (ORCPT ); Thu, 23 Sep 2021 22:27:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42966 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243813AbhIXC1d (ORCPT ); Thu, 23 Sep 2021 22:27:33 -0400 Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [IPv6:2001:4b98:dc2:55:216:3eff:fef7:d647]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8549FC061574 for ; Thu, 23 Sep 2021 19:26:00 -0700 (PDT) Received: from pendragon.ideasonboard.com (62-78-145-57.bb.dnainternet.fi [62.78.145.57]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id C17E458B; Fri, 24 Sep 2021 04:25:57 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1632450358; bh=45e1RdVipct+ZYgoBCG59Y1r2CqJIiDZM00tNcmo9cw=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=lSWHnGvkX11Tky0znlaLjMETSaEQ7jIikpeUFmvnDesmOwI8Jp14TnLq9qdo1Aja9 Hvgw/Y8YwpLOU+SK4X2IHk1RTVHw6kUnKVbG2r+h/j4xg1rdUF/Zaar9xTnEUIC3Nc nczMoz4hMNDQu045FhKIcOhUdXZKSjfnJVw3/PWw= Date: Fri, 24 Sep 2021 05:25:55 +0300 From: Laurent Pinchart To: Rob Clark Cc: dri-devel , freedreno , Douglas Anderson , Rob Clark , Andrzej Hajda , Neil Armstrong , Robert Foss , Jonas Karlman , Jernej Skrabec , David Airlie , Daniel Vetter , open list Subject: Re: [PATCH v2 3/3] drm/bridge: ti-sn65dsi86: Add NO_CONNECTOR support Message-ID: References: <20210920225801.227211-1-robdclark@gmail.com> <20210920225801.227211-4-robdclark@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Rob, On Thu, Sep 23, 2021 at 10:31:52AM -0700, Rob Clark wrote: > On Wed, Sep 22, 2021 at 5:44 PM Laurent Pinchart wrote: > > On Mon, Sep 20, 2021 at 03:58:00PM -0700, Rob Clark wrote: > > > From: Rob Clark > > > > > > Slightly awkward to fish out the display_info when we aren't creating > > > own connector. But I don't see an obvious better way. > > > > > > v2: Remove error return with NO_CONNECTOR flag > > > > > > Signed-off-by: Rob Clark > > > --- > > > drivers/gpu/drm/bridge/ti-sn65dsi86.c | 39 ++++++++++++++++++++------- > > > 1 file changed, 29 insertions(+), 10 deletions(-) > > > > > > diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c b/drivers/gpu/drm/bridge/ti-sn65dsi86.c > > > index 6154bed0af5b..94c94cc8a4d8 100644 > > > --- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c > > > +++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c > > > @@ -667,11 +667,6 @@ static int ti_sn_bridge_attach(struct drm_bridge *bridge, > > > .node = NULL, > > > }; > > > > > > - if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR) { > > > - DRM_ERROR("Fix bridge driver to make connector optional!"); > > > - return -EINVAL; > > > - } > > > - > > > pdata->aux.drm_dev = bridge->dev; > > > ret = drm_dp_aux_register(&pdata->aux); > > > if (ret < 0) { > > > @@ -679,9 +674,11 @@ static int ti_sn_bridge_attach(struct drm_bridge *bridge, > > > return ret; > > > } > > > > > > - ret = ti_sn_bridge_connector_init(pdata); > > > - if (ret < 0) > > > - goto err_conn_init; > > > + if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) { > > > + ret = ti_sn_bridge_connector_init(pdata); > > > + if (ret < 0) > > > + goto err_conn_init; > > > + } > > > > > > /* > > > * TODO: ideally finding host resource and dsi dev registration needs > > > @@ -743,7 +740,8 @@ static int ti_sn_bridge_attach(struct drm_bridge *bridge, > > > err_dsi_attach: > > > mipi_dsi_device_unregister(dsi); > > > err_dsi_host: > > > - drm_connector_cleanup(&pdata->connector); > > > + if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) > > > + drm_connector_cleanup(&pdata->connector); > > > > I wonder if we actually need this. The connector gets attached to the > > encoder, won't it be destroyed by the DRM core in the error path ? > > This does not appear to be the case, we leak the connector if I remove > this (and add a hack to trigger the error path) OK. > > > err_conn_init: > > > drm_dp_aux_unregister(&pdata->aux); > > > return ret; > > > @@ -792,9 +790,30 @@ static void ti_sn_bridge_set_dsi_rate(struct ti_sn65dsi86 *pdata) > > > regmap_write(pdata->regmap, SN_DSIA_CLK_FREQ_REG, val); > > > } > > > > > > +/* > > > + * Find the connector and fish out the bpc from display_info. It would > > > + * be nice if we could get this instead from drm_bridge_state, but that > > > + * doesn't yet appear to be the case. > > > > You already have a bus format in the bridge state, from which you can > > derive the bpp. Could you give it a try ? > > Possibly the bridge should be converted to ->atomic_enable(), etc.. > I'll leave that for another time It should be fairly straightforward, and would avoid the hack below. > > > + */ > > > static unsigned int ti_sn_bridge_get_bpp(struct ti_sn65dsi86 *pdata) > > > { > > > - if (pdata->connector.display_info.bpc <= 6) > > > + struct drm_bridge *bridge = &pdata->bridge; > > > + struct drm_connector_list_iter conn_iter; > > > + struct drm_connector *connector; > > > + unsigned bpc = 0; > > > + > > > + drm_connector_list_iter_begin(bridge->dev, &conn_iter); > > > + drm_for_each_connector_iter(connector, &conn_iter) { > > > + if (drm_connector_has_possible_encoder(connector, bridge->encoder)) { > > > + bpc = connector->display_info.bpc; > > > + break; > > > + } > > > + } > > > + drm_connector_list_iter_end(&conn_iter); > > > + > > > + WARN_ON(bpc == 0); > > > + > > > + if (bpc <= 6) > > > return 18; > > > else > > > return 24; -- Regards, Laurent Pinchart