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=-6.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 BFDE5ECE58C for ; Mon, 14 Oct 2019 20:23:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 91A9B2089C for ; Mon, 14 Oct 2019 20:23:25 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=agner.ch header.i=@agner.ch header.b="gBYlwscW" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732822AbfJNUXY (ORCPT ); Mon, 14 Oct 2019 16:23:24 -0400 Received: from mail.kmu-office.ch ([178.209.48.109]:59732 "EHLO mail.kmu-office.ch" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729667AbfJNUXY (ORCPT ); Mon, 14 Oct 2019 16:23:24 -0400 Received: from webmail.kmu-office.ch (unknown [IPv6:2a02:418:6a02::a3]) by mail.kmu-office.ch (Postfix) with ESMTPSA id 2994A5C1173; Mon, 14 Oct 2019 22:23:20 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=agner.ch; s=dkim; t=1571084600; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=P+rXe5gqDkpR/ocxB4jA4wn6gLVIHyh3cCV/a77qceY=; b=gBYlwscWUPHbKxkp6VSFsPahfglZNpR4LUY6VaSqswdF2KOS+4LpuZzGSDbS6X177L3Byp sD0yyz/kS2E1E2R0cmXu7Dy00K2WcXMtPucfckKM7ljgYofFzsZw3NYO/9M4EMryccoah+ IhBToOeeVVxL61+x9+heWTnHJ2wRysk= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Date: Mon, 14 Oct 2019 22:23:20 +0200 From: Stefan Agner To: Robert Chiras Cc: =?UTF-8?Q?Guido_G=C3=BCnther?= , Marek Vasut , David Airlie , Daniel Vetter , Rob Herring , Mark Rutland , Shawn Guo , Sascha Hauer , Fabio Estevam , Pengutronix Kernel Team , NXP Linux Team , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v4 01/14] drm/mxsfb: Update mxsfb to support a bridge In-Reply-To: <1567078215-31601-2-git-send-email-robert.chiras@nxp.com> References: <1567078215-31601-1-git-send-email-robert.chiras@nxp.com> <1567078215-31601-2-git-send-email-robert.chiras@nxp.com> Message-ID: <4138bd0cea847abb60888a50236c2aa4@agner.ch> X-Sender: stefan@agner.ch User-Agent: Roundcube Webmail/1.3.9 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2019-08-29 13:30, Robert Chiras wrote: > Currently, the MXSFB DRM driver only supports a panel. But, its output > display signal can also be redirected to another encoder, like a DSI > controller. In this case, that DSI controller may act like a drm_bridge. > In order support this use-case too, this patch adds support for drm_bridge > in mxsfb. > > Signed-off-by: Robert Chiras > Tested-by: Guido Günther Applied to the drm-misc-next branch. -- Stefan > --- > drivers/gpu/drm/mxsfb/mxsfb_crtc.c | 17 +++++++++++--- > drivers/gpu/drm/mxsfb/mxsfb_drv.c | 46 +++++++++++++++++++++++++++++++++----- > drivers/gpu/drm/mxsfb/mxsfb_drv.h | 4 +++- > drivers/gpu/drm/mxsfb/mxsfb_out.c | 26 +++++++++++---------- > 4 files changed, 72 insertions(+), 21 deletions(-) > > diff --git a/drivers/gpu/drm/mxsfb/mxsfb_crtc.c > b/drivers/gpu/drm/mxsfb/mxsfb_crtc.c > index 1242156..de09b93 100644 > --- a/drivers/gpu/drm/mxsfb/mxsfb_crtc.c > +++ b/drivers/gpu/drm/mxsfb/mxsfb_crtc.c > @@ -95,8 +95,11 @@ static void mxsfb_set_bus_fmt(struct > mxsfb_drm_private *mxsfb) > > reg = readl(mxsfb->base + LCDC_CTRL); > > - if (mxsfb->connector.display_info.num_bus_formats) > - bus_format = mxsfb->connector.display_info.bus_formats[0]; > + if (mxsfb->connector->display_info.num_bus_formats) > + bus_format = mxsfb->connector->display_info.bus_formats[0]; > + > + DRM_DEV_DEBUG_DRIVER(drm->dev, "Using bus_format: 0x%08X\n", > + bus_format); > > reg &= ~CTRL_BUS_WIDTH_MASK; > switch (bus_format) { > @@ -204,8 +207,9 @@ static dma_addr_t mxsfb_get_fb_paddr(struct > mxsfb_drm_private *mxsfb) > > static void mxsfb_crtc_mode_set_nofb(struct mxsfb_drm_private *mxsfb) > { > + struct drm_device *drm = mxsfb->pipe.crtc.dev; > struct drm_display_mode *m = &mxsfb->pipe.crtc.state->adjusted_mode; > - const u32 bus_flags = mxsfb->connector.display_info.bus_flags; > + const u32 bus_flags = mxsfb->connector->display_info.bus_flags; > u32 vdctrl0, vsync_pulse_len, hsync_pulse_len; > int err; > > @@ -229,6 +233,13 @@ static void mxsfb_crtc_mode_set_nofb(struct > mxsfb_drm_private *mxsfb) > > clk_set_rate(mxsfb->clk, m->crtc_clock * 1000); > > + DRM_DEV_DEBUG_DRIVER(drm->dev, "Pixel clock: %dkHz (actual: %dkHz)\n", > + m->crtc_clock, > + (int)(clk_get_rate(mxsfb->clk) / 1000)); > + DRM_DEV_DEBUG_DRIVER(drm->dev, "Connector bus_flags: 0x%08X\n", > + bus_flags); > + DRM_DEV_DEBUG_DRIVER(drm->dev, "Mode flags: 0x%08X\n", m->flags); > + > writel(TRANSFER_COUNT_SET_VCOUNT(m->crtc_vdisplay) | > TRANSFER_COUNT_SET_HCOUNT(m->crtc_hdisplay), > mxsfb->base + mxsfb->devdata->transfer_count); > diff --git a/drivers/gpu/drm/mxsfb/mxsfb_drv.c > b/drivers/gpu/drm/mxsfb/mxsfb_drv.c > index e850633..497cf44 100644 > --- a/drivers/gpu/drm/mxsfb/mxsfb_drv.c > +++ b/drivers/gpu/drm/mxsfb/mxsfb_drv.c > @@ -101,9 +101,25 @@ static void mxsfb_pipe_enable(struct > drm_simple_display_pipe *pipe, > struct drm_crtc_state *crtc_state, > struct drm_plane_state *plane_state) > { > + struct drm_connector *connector; > struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe); > struct drm_device *drm = pipe->plane.dev; > > + if (!mxsfb->connector) { > + list_for_each_entry(connector, > + &drm->mode_config.connector_list, > + head) > + if (connector->encoder == &mxsfb->pipe.encoder) { > + mxsfb->connector = connector; > + break; > + } > + } > + > + if (!mxsfb->connector) { > + dev_warn(drm->dev, "No connector attached, using default\n"); > + mxsfb->connector = &mxsfb->panel_connector; > + } > + > pm_runtime_get_sync(drm->dev); > drm_panel_prepare(mxsfb->panel); > mxsfb_crtc_enable(mxsfb); > @@ -129,6 +145,9 @@ static void mxsfb_pipe_disable(struct > drm_simple_display_pipe *pipe) > drm_crtc_send_vblank_event(crtc, event); > } > spin_unlock_irq(&drm->event_lock); > + > + if (mxsfb->connector != &mxsfb->panel_connector) > + mxsfb->connector = NULL; > } > > static void mxsfb_pipe_update(struct drm_simple_display_pipe *pipe, > @@ -226,16 +245,33 @@ static int mxsfb_load(struct drm_device *drm, > unsigned long flags) > > ret = drm_simple_display_pipe_init(drm, &mxsfb->pipe, &mxsfb_funcs, > mxsfb_formats, ARRAY_SIZE(mxsfb_formats), NULL, > - &mxsfb->connector); > + mxsfb->connector); > if (ret < 0) { > dev_err(drm->dev, "Cannot setup simple display pipe\n"); > goto err_vblank; > } > > - ret = drm_panel_attach(mxsfb->panel, &mxsfb->connector); > - if (ret) { > - dev_err(drm->dev, "Cannot connect panel\n"); > - goto err_vblank; > + /* > + * Attach panel only if there is one. > + * If there is no panel attach, it must be a bridge. In this case, we > + * need a reference to its connector for a proper initialization. > + * We will do this check in pipe->enable(), since the connector won't > + * be attached to an encoder until then. > + */ > + > + if (mxsfb->panel) { > + ret = drm_panel_attach(mxsfb->panel, mxsfb->connector); > + if (ret) { > + dev_err(drm->dev, "Cannot connect panel: %d\n", ret); > + goto err_vblank; > + } > + } else if (mxsfb->bridge) { > + ret = drm_simple_display_pipe_attach_bridge(&mxsfb->pipe, > + mxsfb->bridge); > + if (ret) { > + dev_err(drm->dev, "Cannot connect bridge: %d\n", ret); > + goto err_vblank; > + } > } > > drm->mode_config.min_width = MXSFB_MIN_XRES; > diff --git a/drivers/gpu/drm/mxsfb/mxsfb_drv.h > b/drivers/gpu/drm/mxsfb/mxsfb_drv.h > index d975300..0b65b51 100644 > --- a/drivers/gpu/drm/mxsfb/mxsfb_drv.h > +++ b/drivers/gpu/drm/mxsfb/mxsfb_drv.h > @@ -27,8 +27,10 @@ struct mxsfb_drm_private { > struct clk *clk_disp_axi; > > struct drm_simple_display_pipe pipe; > - struct drm_connector connector; > + struct drm_connector panel_connector; > + struct drm_connector *connector; > struct drm_panel *panel; > + struct drm_bridge *bridge; > }; > > int mxsfb_setup_crtc(struct drm_device *dev); > diff --git a/drivers/gpu/drm/mxsfb/mxsfb_out.c > b/drivers/gpu/drm/mxsfb/mxsfb_out.c > index be36f4d..4eb9474 100644 > --- a/drivers/gpu/drm/mxsfb/mxsfb_out.c > +++ b/drivers/gpu/drm/mxsfb/mxsfb_out.c > @@ -21,7 +21,8 @@ > static struct mxsfb_drm_private * > drm_connector_to_mxsfb_drm_private(struct drm_connector *connector) > { > - return container_of(connector, struct mxsfb_drm_private, connector); > + return container_of(connector, struct mxsfb_drm_private, > + panel_connector); > } > > static int mxsfb_panel_get_modes(struct drm_connector *connector) > @@ -76,22 +77,23 @@ static const struct drm_connector_funcs > mxsfb_panel_connector_funcs = { > int mxsfb_create_output(struct drm_device *drm) > { > struct mxsfb_drm_private *mxsfb = drm->dev_private; > - struct drm_panel *panel; > int ret; > > - ret = drm_of_find_panel_or_bridge(drm->dev->of_node, 0, 0, &panel, NULL); > + ret = drm_of_find_panel_or_bridge(drm->dev->of_node, 0, 0, > + &mxsfb->panel, &mxsfb->bridge); > if (ret) > return ret; > > - mxsfb->connector.dpms = DRM_MODE_DPMS_OFF; > - mxsfb->connector.polled = 0; > - drm_connector_helper_add(&mxsfb->connector, > - &mxsfb_panel_connector_helper_funcs); > - ret = drm_connector_init(drm, &mxsfb->connector, > - &mxsfb_panel_connector_funcs, > - DRM_MODE_CONNECTOR_Unknown); > - if (!ret) > - mxsfb->panel = panel; > + if (mxsfb->panel) { > + mxsfb->connector = &mxsfb->panel_connector; > + mxsfb->connector->dpms = DRM_MODE_DPMS_OFF; > + mxsfb->connector->polled = 0; > + drm_connector_helper_add(mxsfb->connector, > + &mxsfb_panel_connector_helper_funcs); > + ret = drm_connector_init(drm, mxsfb->connector, > + &mxsfb_panel_connector_funcs, > + DRM_MODE_CONNECTOR_Unknown); > + } > > return ret; > }