linux-stable/drivers/gpu/drm/meson/meson_venc_cvbs.c
Rob Herring 86418f90a4 drm: convert drivers to use of_graph_get_remote_node
Convert drivers to use the new of_graph_get_remote_node() helper
instead of parsing the endpoint node and then getting the remote device
node. Now drivers can just specify the device node and which
port/endpoint and get back the connected remote device node. The details
of the graph binding are nicely abstracted into the core OF graph code.

This changes some error messages to debug messages (in the graph core).
Graph connections are often "no connects" depending on the particular
board, so we want to avoid spurious messages. Plus the kernel is not a
DT validator.

Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Tested-by: Liviu Dudau <liviu.dudau@arm.com>
Tested-by: Eric Anholt <eric@anholt.net>
Tested-by: Jyri Sarha <jsarha@ti.com>
Tested by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
2017-04-06 17:00:27 -04:00

289 lines
7.9 KiB
C

/*
* Copyright (C) 2016 BayLibre, SAS
* Author: Neil Armstrong <narmstrong@baylibre.com>
* Copyright (C) 2015 Amlogic, Inc. All rights reserved.
* Copyright (C) 2014 Endless Mobile
*
* 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.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*
* Written by:
* Jasper St. Pierre <jstpierre@mecheye.net>
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of_graph.h>
#include <drm/drmP.h>
#include <drm/drm_edid.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_atomic_helper.h>
#include "meson_venc_cvbs.h"
#include "meson_venc.h"
#include "meson_vclk.h"
#include "meson_registers.h"
/* HHI VDAC Registers */
#define HHI_VDAC_CNTL0 0x2F4 /* 0xbd offset in data sheet */
#define HHI_VDAC_CNTL1 0x2F8 /* 0xbe offset in data sheet */
struct meson_venc_cvbs {
struct drm_encoder encoder;
struct drm_connector connector;
struct meson_drm *priv;
};
#define encoder_to_meson_venc_cvbs(x) \
container_of(x, struct meson_venc_cvbs, encoder)
#define connector_to_meson_venc_cvbs(x) \
container_of(x, struct meson_venc_cvbs, connector)
/* Supported Modes */
struct meson_cvbs_mode meson_cvbs_modes[MESON_CVBS_MODES_COUNT] = {
{ /* PAL */
.enci = &meson_cvbs_enci_pal,
.mode = {
DRM_MODE("720x576i", DRM_MODE_TYPE_DRIVER, 13500,
720, 732, 795, 864, 0, 576, 580, 586, 625, 0,
DRM_MODE_FLAG_INTERLACE),
.vrefresh = 50,
.picture_aspect_ratio = HDMI_PICTURE_ASPECT_4_3,
},
},
{ /* NTSC */
.enci = &meson_cvbs_enci_ntsc,
.mode = {
DRM_MODE("720x480i", DRM_MODE_TYPE_DRIVER, 13500,
720, 739, 801, 858, 0, 480, 488, 494, 525, 0,
DRM_MODE_FLAG_INTERLACE),
.vrefresh = 60,
.picture_aspect_ratio = HDMI_PICTURE_ASPECT_4_3,
},
},
};
/* Connector */
static void meson_cvbs_connector_destroy(struct drm_connector *connector)
{
drm_connector_cleanup(connector);
}
static enum drm_connector_status
meson_cvbs_connector_detect(struct drm_connector *connector, bool force)
{
/* FIXME: Add load-detect or jack-detect if possible */
return connector_status_connected;
}
static int meson_cvbs_connector_get_modes(struct drm_connector *connector)
{
struct drm_device *dev = connector->dev;
struct drm_display_mode *mode;
int i;
for (i = 0; i < MESON_CVBS_MODES_COUNT; ++i) {
struct meson_cvbs_mode *meson_mode = &meson_cvbs_modes[i];
mode = drm_mode_duplicate(dev, &meson_mode->mode);
if (!mode) {
DRM_ERROR("Failed to create a new display mode\n");
return 0;
}
drm_mode_probed_add(connector, mode);
}
return i;
}
static int meson_cvbs_connector_mode_valid(struct drm_connector *connector,
struct drm_display_mode *mode)
{
/* Validate the modes added in get_modes */
return MODE_OK;
}
static const struct drm_connector_funcs meson_cvbs_connector_funcs = {
.dpms = drm_atomic_helper_connector_dpms,
.detect = meson_cvbs_connector_detect,
.fill_modes = drm_helper_probe_single_connector_modes,
.destroy = meson_cvbs_connector_destroy,
.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 meson_cvbs_connector_helper_funcs = {
.get_modes = meson_cvbs_connector_get_modes,
.mode_valid = meson_cvbs_connector_mode_valid,
};
/* Encoder */
static void meson_venc_cvbs_encoder_destroy(struct drm_encoder *encoder)
{
drm_encoder_cleanup(encoder);
}
static const struct drm_encoder_funcs meson_venc_cvbs_encoder_funcs = {
.destroy = meson_venc_cvbs_encoder_destroy,
};
static int meson_venc_cvbs_encoder_atomic_check(struct drm_encoder *encoder,
struct drm_crtc_state *crtc_state,
struct drm_connector_state *conn_state)
{
int i;
for (i = 0; i < MESON_CVBS_MODES_COUNT; ++i) {
struct meson_cvbs_mode *meson_mode = &meson_cvbs_modes[i];
if (drm_mode_equal(&crtc_state->mode, &meson_mode->mode))
return 0;
}
return -EINVAL;
}
static void meson_venc_cvbs_encoder_disable(struct drm_encoder *encoder)
{
struct meson_venc_cvbs *meson_venc_cvbs =
encoder_to_meson_venc_cvbs(encoder);
struct meson_drm *priv = meson_venc_cvbs->priv;
/* Disable CVBS VDAC */
regmap_write(priv->hhi, HHI_VDAC_CNTL0, 0);
regmap_write(priv->hhi, HHI_VDAC_CNTL1, 8);
}
static void meson_venc_cvbs_encoder_enable(struct drm_encoder *encoder)
{
struct meson_venc_cvbs *meson_venc_cvbs =
encoder_to_meson_venc_cvbs(encoder);
struct meson_drm *priv = meson_venc_cvbs->priv;
/* VDAC0 source is not from ATV */
writel_bits_relaxed(BIT(5), 0, priv->io_base + _REG(VENC_VDAC_DACSEL0));
if (meson_vpu_is_compatible(priv, "amlogic,meson-gxbb-vpu"))
regmap_write(priv->hhi, HHI_VDAC_CNTL0, 1);
else if (meson_vpu_is_compatible(priv, "amlogic,meson-gxm-vpu") ||
meson_vpu_is_compatible(priv, "amlogic,meson-gxl-vpu"))
regmap_write(priv->hhi, HHI_VDAC_CNTL0, 0xf0001);
regmap_write(priv->hhi, HHI_VDAC_CNTL1, 0);
}
static void meson_venc_cvbs_encoder_mode_set(struct drm_encoder *encoder,
struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
struct meson_venc_cvbs *meson_venc_cvbs =
encoder_to_meson_venc_cvbs(encoder);
struct meson_drm *priv = meson_venc_cvbs->priv;
int i;
for (i = 0; i < MESON_CVBS_MODES_COUNT; ++i) {
struct meson_cvbs_mode *meson_mode = &meson_cvbs_modes[i];
if (drm_mode_equal(mode, &meson_mode->mode)) {
meson_venci_cvbs_mode_set(priv,
meson_mode->enci);
/* Setup 27MHz vclk2 for ENCI and VDAC */
meson_vclk_setup(priv, MESON_VCLK_TARGET_CVBS,
MESON_VCLK_CVBS, MESON_VCLK_CVBS,
MESON_VCLK_CVBS, true);
break;
}
}
}
static const struct drm_encoder_helper_funcs
meson_venc_cvbs_encoder_helper_funcs = {
.atomic_check = meson_venc_cvbs_encoder_atomic_check,
.disable = meson_venc_cvbs_encoder_disable,
.enable = meson_venc_cvbs_encoder_enable,
.mode_set = meson_venc_cvbs_encoder_mode_set,
};
static bool meson_venc_cvbs_connector_is_available(struct meson_drm *priv)
{
struct device_node *remote;
remote = of_graph_get_remote_node(priv->dev->of_node, 0, 0);
if (!remote)
return false;
of_node_put(remote);
return true;
}
int meson_venc_cvbs_create(struct meson_drm *priv)
{
struct drm_device *drm = priv->drm;
struct meson_venc_cvbs *meson_venc_cvbs;
struct drm_connector *connector;
struct drm_encoder *encoder;
int ret;
if (!meson_venc_cvbs_connector_is_available(priv)) {
dev_info(drm->dev, "CVBS Output connector not available\n");
return 0;
}
meson_venc_cvbs = devm_kzalloc(priv->dev, sizeof(*meson_venc_cvbs),
GFP_KERNEL);
if (!meson_venc_cvbs)
return -ENOMEM;
meson_venc_cvbs->priv = priv;
encoder = &meson_venc_cvbs->encoder;
connector = &meson_venc_cvbs->connector;
/* Connector */
drm_connector_helper_add(connector,
&meson_cvbs_connector_helper_funcs);
ret = drm_connector_init(drm, connector, &meson_cvbs_connector_funcs,
DRM_MODE_CONNECTOR_Composite);
if (ret) {
dev_err(priv->dev, "Failed to init CVBS connector\n");
return ret;
}
connector->interlace_allowed = 1;
/* Encoder */
drm_encoder_helper_add(encoder, &meson_venc_cvbs_encoder_helper_funcs);
ret = drm_encoder_init(drm, encoder, &meson_venc_cvbs_encoder_funcs,
DRM_MODE_ENCODER_TVDAC, "meson_venc_cvbs");
if (ret) {
dev_err(priv->dev, "Failed to init CVBS encoder\n");
return ret;
}
encoder->possible_crtcs = BIT(0);
drm_mode_connector_attach_encoder(connector, encoder);
return 0;
}