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Commit 14b469f9 authored by Linus Walleij's avatar Linus Walleij
Browse files

drm/tve200: Replace custom connector with panel bridge 



This replaces the custom connector in the TVE200 with the
panel bridge helper. As long as we're just using panels
and no other bridges, this works just fine.

Reviewed-by: default avatarEric Anholt <eric@anholt.net>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20170902200711.29298-1-linus.walleij@linaro.org
parent b52f09c4

drivers/gpu/drm/tve200/Kconfig

+2 −1
Original line number Diff line number Diff line
@@ -4,7 +4,8 @@ config DRM_TVE200 
	depends on CMA

	depends on ARM || COMPILE_TEST

	depends on OF

	select DRM_PANEL

	select DRM_BRIDGE

	select DRM_PANEL_BRIDGE

	select DRM_KMS_HELPER

	select DRM_KMS_CMA_HELPER

	select DRM_GEM_CMA_HELPER

drivers/gpu/drm/tve200/Makefile

+1 −2
Original line number Diff line number Diff line 
tve200_drm-y +=	tve200_connector.o \

		tve200_display.o \

tve200_drm-y +=	tve200_display.o \

		tve200_drv.o



obj-$(CONFIG_DRM_TVE200) += tve200_drm.o

drivers/gpu/drm/tve200/tve200_connector.c

deleted100644 → 0
+0 −125
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2017 Linus Walleij <linus.walleij@linaro.org>

 * Parts of this file were based on sources as follows:

 *

 * Copyright (C) 2006-2008 Intel Corporation

 * Copyright (C) 2007 Amos Lee <amos_lee@storlinksemi.com>

 * Copyright (C) 2007 Dave Airlie <airlied@linux.ie>

 * Copyright (C) 2011 Texas Instruments

 * Copyright (C) 2017 Eric Anholt

 *

 * This program is free software and is provided to you under the terms of the

 * GNU General Public License version 2 as published by the Free Software

 * Foundation, and any use by you of this program is subject to the terms of

 * such GNU licence.

 */



/**

 * tve200_drm_connector.c

 * Implementation of the connector functions for the Faraday TV Encoder

 */

#include <linux/version.h>

#include <linux/shmem_fs.h>

#include <linux/dma-buf.h>



#include <drm/drmP.h>

#include <drm/drm_atomic_helper.h>

#include <drm/drm_crtc_helper.h>

#include <drm/drm_of.h>

#include <drm/drm_panel.h>



#include "tve200_drm.h"



static void tve200_connector_destroy(struct drm_connector *connector)

{

	struct tve200_drm_connector *tve200con =

		to_tve200_connector(connector);



	if (tve200con->panel)

		drm_panel_detach(tve200con->panel);



	drm_connector_unregister(connector);

	drm_connector_cleanup(connector);

}



static enum drm_connector_status tve200_connector_detect(struct drm_connector

							*connector, bool force)

{

	struct tve200_drm_connector *tve200con =

		to_tve200_connector(connector);



	return (tve200con->panel ?

		connector_status_connected :

		connector_status_disconnected);

}



static int tve200_connector_helper_get_modes(struct drm_connector *connector)

{

	struct tve200_drm_connector *tve200con =

		to_tve200_connector(connector);



	if (!tve200con->panel)

		return 0;



	return drm_panel_get_modes(tve200con->panel);

}



static const struct drm_connector_funcs connector_funcs = {

	.fill_modes = drm_helper_probe_single_connector_modes,

	.destroy = tve200_connector_destroy,

	.detect = tve200_connector_detect,

	.reset = drm_atomic_helper_connector_reset,

	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,

	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,

};



static const struct drm_connector_helper_funcs connector_helper_funcs = {

	.get_modes = tve200_connector_helper_get_modes,

};



/*

 * Walks the OF graph to find the panel node and then asks DRM to look

 * up the panel.

 */

static struct drm_panel *tve200_get_panel(struct device *dev)

{

	struct device_node *endpoint, *panel_node;

	struct device_node *np = dev->of_node;

	struct drm_panel *panel;



	endpoint = of_graph_get_next_endpoint(np, NULL);

	if (!endpoint) {

		dev_err(dev, "no endpoint to fetch panel\n");

		return NULL;

	}



	/* Don't proceed if we have an endpoint but no panel_node tied to it */

	panel_node = of_graph_get_remote_port_parent(endpoint);

	of_node_put(endpoint);

	if (!panel_node) {

		dev_err(dev, "no valid panel node\n");

		return NULL;

	}



	panel = of_drm_find_panel(panel_node);

	of_node_put(panel_node);



	return panel;

}



int tve200_connector_init(struct drm_device *dev)

{

	struct tve200_drm_dev_private *priv = dev->dev_private;

	struct tve200_drm_connector *tve200con = &priv->connector;

	struct drm_connector *connector = &tve200con->connector;



	drm_connector_init(dev, connector, &connector_funcs,

			   DRM_MODE_CONNECTOR_DPI);

	drm_connector_helper_add(connector, &connector_helper_funcs);



	tve200con->panel = tve200_get_panel(dev->dev);

	if (tve200con->panel)

		drm_panel_attach(tve200con->panel, connector);



	return 0;

}

drivers/gpu/drm/tve200/tve200_display.c

+5 −10
Original line number Diff line number Diff line
@@ -127,7 +127,7 @@ static void tve200_display_enable(struct drm_simple_display_pipe *pipe, 
	struct tve200_drm_dev_private *priv = drm->dev_private;

	const struct drm_display_mode *mode = &cstate->mode;

	struct drm_framebuffer *fb = plane->state->fb;

	struct drm_connector *connector = &priv->connector.connector;

	struct drm_connector *connector = priv->connector;

	u32 format = fb->format->format;

	u32 ctrl1 = 0;
@@ -215,13 +215,9 @@ static void tve200_display_enable(struct drm_simple_display_pipe *pipe, 


	ctrl1 |= TVE200_TVEEN;



	drm_panel_prepare(priv->connector.panel);



	/* Turn it on */

	writel(ctrl1, priv->regs + TVE200_CTRL);



	drm_panel_enable(priv->connector.panel);



	drm_crtc_vblank_on(crtc);

}
@@ -233,13 +229,9 @@ void tve200_display_disable(struct drm_simple_display_pipe *pipe) 


	drm_crtc_vblank_off(crtc);



	drm_panel_disable(priv->connector.panel);



	/* Disable and Power Down */

	writel(0, priv->regs + TVE200_CTRL);



	drm_panel_unprepare(priv->connector.panel);



	clk_disable_unprepare(priv->clk);

}
@@ -337,9 +329,12 @@ int tve200_display_init(struct drm_device *drm) 
					   &tve200_display_funcs,

					   formats, ARRAY_SIZE(formats),

					   NULL,

					   &priv->connector.connector);

					   priv->connector);

	if (ret)

		return ret;



	/* We need the encoder to attach the bridge */

	priv->encoder = &priv->pipe.encoder;



	return 0;

}

drivers/gpu/drm/tve200/tve200_drm.h

+4 −6
Original line number Diff line number Diff line
@@ -96,15 +96,13 @@ 
#include <drm/drm_gem.h>

#include <drm/drm_simple_kms_helper.h>



struct tve200_drm_connector {

	struct drm_connector connector;

	struct drm_panel *panel;

};



struct tve200_drm_dev_private {

	struct drm_device *drm;



	struct tve200_drm_connector connector;

	struct drm_connector *connector;

	struct drm_encoder *encoder;

	struct drm_panel *panel;

	struct drm_bridge *bridge;

	struct drm_simple_display_pipe pipe;

	struct drm_fbdev_cma *fbdev;