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drm: rcar-du: Replace manual bridge implementation with DRM bridge

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The rcar-du driver contains a manual implementation of HDMI and VGA
bridges. Use DRM bridges to replace it.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
This commit is contained in:
Laurent Pinchart 2016-10-07 16:01:41 +03:00
parent e947eccbeb
commit 5c602531fe
8 changed files with 62 additions and 333 deletions
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6
drivers/gpu/drm/rcar-du/Kconfig
View File

@ -11,12 +11,6 @@ config DRM_RCAR_DU
Choose this option if you have an R-Car chipset. Choose this option if you have an R-Car chipset.
If M is selected the module will be called rcar-du-drm. If M is selected the module will be called rcar-du-drm.
config DRM_RCAR_HDMI
bool "R-Car DU HDMI Encoder Support"
depends on DRM_RCAR_DU
help
Enable support for external HDMI encoders.
config DRM_RCAR_LVDS config DRM_RCAR_LVDS
bool "R-Car DU LVDS Encoder Support" bool "R-Car DU LVDS Encoder Support"
depends on DRM_RCAR_DU depends on DRM_RCAR_DU

5
drivers/gpu/drm/rcar-du/Makefile
View File

@ -4,10 +4,7 @@ rcar-du-drm-y := rcar_du_crtc.o \
rcar_du_group.o \ rcar_du_group.o \
rcar_du_kms.o \ rcar_du_kms.o \
rcar_du_lvdscon.o \ rcar_du_lvdscon.o \
rcar_du_plane.o \ rcar_du_plane.o
rcar_du_vgacon.o
rcar-du-drm-$(CONFIG_DRM_RCAR_HDMI) += rcar_du_hdmienc.o
rcar-du-drm-$(CONFIG_DRM_RCAR_LVDS) += rcar_du_lvdsenc.o rcar-du-drm-$(CONFIG_DRM_RCAR_LVDS) += rcar_du_lvdsenc.o

108
drivers/gpu/drm/rcar-du/rcar_du_encoder.c
View File

@ -20,11 +20,9 @@
#include "rcar_du_drv.h" #include "rcar_du_drv.h"
#include "rcar_du_encoder.h" #include "rcar_du_encoder.h"
#include "rcar_du_hdmienc.h"
#include "rcar_du_kms.h" #include "rcar_du_kms.h"
#include "rcar_du_lvdscon.h" #include "rcar_du_lvdscon.h"
#include "rcar_du_lvdsenc.h" #include "rcar_du_lvdsenc.h"
#include "rcar_du_vgacon.h"
/* ----------------------------------------------------------------------------- /* -----------------------------------------------------------------------------
* Encoder * Encoder
@ -63,30 +61,36 @@ static int rcar_du_encoder_atomic_check(struct drm_encoder *encoder,
struct rcar_du_encoder *renc = to_rcar_encoder(encoder); struct rcar_du_encoder *renc = to_rcar_encoder(encoder);
struct drm_display_mode *adjusted_mode = &crtc_state->adjusted_mode; struct drm_display_mode *adjusted_mode = &crtc_state->adjusted_mode;
const struct drm_display_mode *mode = &crtc_state->mode; const struct drm_display_mode *mode = &crtc_state->mode;
const struct drm_display_mode *panel_mode;
struct drm_connector *connector = conn_state->connector; struct drm_connector *connector = conn_state->connector;
struct drm_device *dev = encoder->dev; struct drm_device *dev = encoder->dev;
/* DAC encoders have currently no restriction on the mode. */ /*
if (encoder->encoder_type == DRM_MODE_ENCODER_DAC) * Only panel-related encoder types require validation here, everything
return 0; * else is handled by the bridge drivers.
*/
if (encoder->encoder_type == DRM_MODE_ENCODER_LVDS) {
const struct drm_display_mode *panel_mode;
if (list_empty(&connector->modes)) { if (list_empty(&connector->modes)) {
dev_dbg(dev->dev, "encoder: empty modes list\n"); dev_dbg(dev->dev, "encoder: empty modes list\n");
return -EINVAL; return -EINVAL;
}
panel_mode = list_first_entry(&connector->modes,
struct drm_display_mode, head);
/* We're not allowed to modify the resolution. */
if (mode->hdisplay != panel_mode->hdisplay ||
mode->vdisplay != panel_mode->vdisplay)
return -EINVAL;
/*
* The flat panel mode is fixed, just copy it to the adjusted
* mode.
*/
drm_mode_copy(adjusted_mode, panel_mode);
} }
panel_mode = list_first_entry(&connector->modes,
struct drm_display_mode, head);
/* We're not allowed to modify the resolution. */
if (mode->hdisplay != panel_mode->hdisplay ||
mode->vdisplay != panel_mode->vdisplay)
return -EINVAL;
/* The flat panel mode is fixed, just copy it to the adjusted mode. */
drm_mode_copy(adjusted_mode, panel_mode);
if (renc->lvds) if (renc->lvds)
rcar_du_lvdsenc_atomic_check(renc->lvds, adjusted_mode); rcar_du_lvdsenc_atomic_check(renc->lvds, adjusted_mode);
@ -159,6 +163,7 @@ int rcar_du_encoder_init(struct rcar_du_device *rcdu,
{ {
struct rcar_du_encoder *renc; struct rcar_du_encoder *renc;
struct drm_encoder *encoder; struct drm_encoder *encoder;
struct drm_bridge *bridge = NULL;
unsigned int encoder_type; unsigned int encoder_type;
int ret; int ret;
@ -182,6 +187,15 @@ int rcar_du_encoder_init(struct rcar_du_device *rcdu,
break; break;
} }
if (enc_node) {
/* Locate the DRM bridge from the encoder DT node. */
bridge = of_drm_find_bridge(enc_node);
if (!bridge) {
ret = -EPROBE_DEFER;
goto done;
}
}
switch (type) { switch (type) {
case RCAR_DU_ENCODER_VGA: case RCAR_DU_ENCODER_VGA:
encoder_type = DRM_MODE_ENCODER_DAC; encoder_type = DRM_MODE_ENCODER_DAC;
@ -199,35 +213,35 @@ int rcar_du_encoder_init(struct rcar_du_device *rcdu,
break; break;
} }
if (type == RCAR_DU_ENCODER_HDMI) { ret = drm_encoder_init(rcdu->ddev, encoder, &encoder_funcs,
ret = rcar_du_hdmienc_init(rcdu, renc, enc_node); encoder_type, NULL);
if (ret < 0) if (ret < 0)
goto done; goto done;
drm_encoder_helper_add(encoder, &encoder_helper_funcs);
if (bridge) {
/*
* Attach the bridge to the encoder. The bridge will create the
* connector.
*/
ret = drm_bridge_attach(encoder, bridge, NULL);
if (ret) {
drm_encoder_cleanup(encoder);
return ret;
}
} else { } else {
ret = drm_encoder_init(rcdu->ddev, encoder, &encoder_funcs, /* There's no bridge, create the connector manually. */
encoder_type, NULL); switch (output) {
if (ret < 0) case RCAR_DU_OUTPUT_LVDS0:
goto done; case RCAR_DU_OUTPUT_LVDS1:
ret = rcar_du_lvds_connector_init(rcdu, renc, con_node);
break;
drm_encoder_helper_add(encoder, &encoder_helper_funcs); default:
} ret = -EINVAL;
break;
switch (encoder_type) { }
case DRM_MODE_ENCODER_LVDS:
ret = rcar_du_lvds_connector_init(rcdu, renc, con_node);
break;
case DRM_MODE_ENCODER_DAC:
ret = rcar_du_vga_connector_init(rcdu, renc);
break;
case DRM_MODE_ENCODER_TMDS:
/* connector managed by the bridge driver */
break;
default:
ret = -EINVAL;
break;
} }
done: done:

2
drivers/gpu/drm/rcar-du/rcar_du_encoder.h
View File

@ -19,7 +19,6 @@
struct drm_panel; struct drm_panel;
struct rcar_du_device; struct rcar_du_device;
struct rcar_du_hdmienc;
struct rcar_du_lvdsenc; struct rcar_du_lvdsenc;
enum rcar_du_encoder_type { enum rcar_du_encoder_type {
@ -34,7 +33,6 @@ struct rcar_du_encoder {
struct drm_encoder base; struct drm_encoder base;
enum rcar_du_output output; enum rcar_du_output output;
struct rcar_du_connector *connector; struct rcar_du_connector *connector;
struct rcar_du_hdmienc *hdmi;
struct rcar_du_lvdsenc *lvds; struct rcar_du_lvdsenc *lvds;
}; };

134
drivers/gpu/drm/rcar-du/rcar_du_hdmienc.c
View File

@ -1,134 +0,0 @@
/*
* R-Car Display Unit HDMI Encoder
*
* Copyright (C) 2014 Renesas Electronics Corporation
*
* Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <linux/slab.h>
#include <drm/drmP.h>
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
#include "rcar_du_drv.h"
#include "rcar_du_encoder.h"
#include "rcar_du_hdmienc.h"
#include "rcar_du_lvdsenc.h"
struct rcar_du_hdmienc {
struct rcar_du_encoder *renc;
bool enabled;
};
#define to_rcar_hdmienc(e) (to_rcar_encoder(e)->hdmi)
static void rcar_du_hdmienc_disable(struct drm_encoder *encoder)
{
struct rcar_du_hdmienc *hdmienc = to_rcar_hdmienc(encoder);
if (hdmienc->renc->lvds)
rcar_du_lvdsenc_enable(hdmienc->renc->lvds, encoder->crtc,
false);
hdmienc->enabled = false;
}
static void rcar_du_hdmienc_enable(struct drm_encoder *encoder)
{
struct rcar_du_hdmienc *hdmienc = to_rcar_hdmienc(encoder);
if (hdmienc->renc->lvds)
rcar_du_lvdsenc_enable(hdmienc->renc->lvds, encoder->crtc,
true);
hdmienc->enabled = true;
}
static int rcar_du_hdmienc_atomic_check(struct drm_encoder *encoder,
struct drm_crtc_state *crtc_state,
struct drm_connector_state *conn_state)
{
struct rcar_du_hdmienc *hdmienc = to_rcar_hdmienc(encoder);
struct drm_display_mode *adjusted_mode = &crtc_state->adjusted_mode;
if (hdmienc->renc->lvds)
rcar_du_lvdsenc_atomic_check(hdmienc->renc->lvds,
adjusted_mode);
return 0;
}
static void rcar_du_hdmienc_mode_set(struct drm_encoder *encoder,
struct drm_crtc_state *crtc_state,
struct drm_connector_state *conn_state)
{
struct rcar_du_hdmienc *hdmienc = to_rcar_hdmienc(encoder);
rcar_du_crtc_route_output(crtc_state->crtc, hdmienc->renc->output);
}
static const struct drm_encoder_helper_funcs encoder_helper_funcs = {
.atomic_mode_set = rcar_du_hdmienc_mode_set,
.disable = rcar_du_hdmienc_disable,
.enable = rcar_du_hdmienc_enable,
.atomic_check = rcar_du_hdmienc_atomic_check,
};
static void rcar_du_hdmienc_cleanup(struct drm_encoder *encoder)
{
struct rcar_du_hdmienc *hdmienc = to_rcar_hdmienc(encoder);
if (hdmienc->enabled)
rcar_du_hdmienc_disable(encoder);
drm_encoder_cleanup(encoder);
}
static const struct drm_encoder_funcs encoder_funcs = {
.destroy = rcar_du_hdmienc_cleanup,
};
int rcar_du_hdmienc_init(struct rcar_du_device *rcdu,
struct rcar_du_encoder *renc, struct device_node *np)
{
struct drm_encoder *encoder = rcar_encoder_to_drm_encoder(renc);
struct drm_bridge *bridge;
struct rcar_du_hdmienc *hdmienc;
int ret;
hdmienc = devm_kzalloc(rcdu->dev, sizeof(*hdmienc), GFP_KERNEL);
if (hdmienc == NULL)
return -ENOMEM;
/* Locate the DRM bridge from the HDMI encoder DT node. */
bridge = of_drm_find_bridge(np);
if (!bridge)
return -EPROBE_DEFER;
ret = drm_encoder_init(rcdu->ddev, encoder, &encoder_funcs,
DRM_MODE_ENCODER_TMDS, NULL);
if (ret < 0)
return ret;
drm_encoder_helper_add(encoder, &encoder_helper_funcs);
renc->hdmi = hdmienc;
hdmienc->renc = renc;
/* Link the bridge to the encoder. */
ret = drm_bridge_attach(encoder, bridge, NULL);
if (ret) {
drm_encoder_cleanup(encoder);
return ret;
}
return 0;
}

35
drivers/gpu/drm/rcar-du/rcar_du_hdmienc.h
View File

@ -1,35 +0,0 @@
/*
* R-Car Display Unit HDMI Encoder
*
* Copyright (C) 2014 Renesas Electronics Corporation
*
* Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#ifndef __RCAR_DU_HDMIENC_H__
#define __RCAR_DU_HDMIENC_H__
#include <linux/module.h>
struct device_node;
struct rcar_du_device;
struct rcar_du_encoder;
#if IS_ENABLED(CONFIG_DRM_RCAR_HDMI)
int rcar_du_hdmienc_init(struct rcar_du_device *rcdu,
struct rcar_du_encoder *renc, struct device_node *np);
#else
static inline int rcar_du_hdmienc_init(struct rcar_du_device *rcdu,
struct rcar_du_encoder *renc,
struct device_node *np)
{
return -ENOSYS;
}
#endif
#endif /* __RCAR_DU_HDMIENC_H__ */

82
drivers/gpu/drm/rcar-du/rcar_du_vgacon.c
View File

@ -1,82 +0,0 @@
/*
* rcar_du_vgacon.c -- R-Car Display Unit VGA Connector
*
* Copyright (C) 2013-2014 Renesas Electronics Corporation
*
* Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <drm/drmP.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
#include "rcar_du_drv.h"
#include "rcar_du_encoder.h"
#include "rcar_du_kms.h"
#include "rcar_du_vgacon.h"
static int rcar_du_vga_connector_get_modes(struct drm_connector *connector)
{
return 0;
}
static const struct drm_connector_helper_funcs connector_helper_funcs = {
.get_modes = rcar_du_vga_connector_get_modes,
};
static enum drm_connector_status
rcar_du_vga_connector_detect(struct drm_connector *connector, bool force)
{
return connector_status_connected;
}
static const struct drm_connector_funcs connector_funcs = {
.dpms = drm_atomic_helper_connector_dpms,
.reset = drm_atomic_helper_connector_reset,
.detect = rcar_du_vga_connector_detect,
.fill_modes = drm_helper_probe_single_connector_modes,
.destroy = drm_connector_cleanup,
.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
};
int rcar_du_vga_connector_init(struct rcar_du_device *rcdu,
struct rcar_du_encoder *renc)
{
struct drm_encoder *encoder = rcar_encoder_to_drm_encoder(renc);
struct rcar_du_connector *rcon;
struct drm_connector *connector;
int ret;
rcon = devm_kzalloc(rcdu->dev, sizeof(*rcon), GFP_KERNEL);
if (rcon == NULL)
return -ENOMEM;
connector = &rcon->connector;
connector->display_info.width_mm = 0;
connector->display_info.height_mm = 0;
connector->interlace_allowed = true;
ret = drm_connector_init(rcdu->ddev, connector, &connector_funcs,
DRM_MODE_CONNECTOR_VGA);
if (ret < 0)
return ret;
drm_connector_helper_add(connector, &connector_helper_funcs);
connector->dpms = DRM_MODE_DPMS_OFF;
drm_object_property_set_value(&connector->base,
rcdu->ddev->mode_config.dpms_property, DRM_MODE_DPMS_OFF);
ret = drm_mode_connector_attach_encoder(connector, encoder);
if (ret < 0)
return ret;
return 0;
}

23
drivers/gpu/drm/rcar-du/rcar_du_vgacon.h
View File

@ -1,23 +0,0 @@
/*
* rcar_du_vgacon.h -- R-Car Display Unit VGA Connector
*
* Copyright (C) 2013-2014 Renesas Electronics Corporation
*
* Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#ifndef __RCAR_DU_VGACON_H__
#define __RCAR_DU_VGACON_H__
struct rcar_du_device;
struct rcar_du_encoder;
int rcar_du_vga_connector_init(struct rcar_du_device *rcdu,
struct rcar_du_encoder *renc);
#endif /* __RCAR_DU_VGACON_H__ */