diff options
Diffstat (limited to 'drivers/gpu/drm/meson/meson_venc_cvbs.c')
| -rw-r--r-- | drivers/gpu/drm/meson/meson_venc_cvbs.c | 293 |
1 files changed, 293 insertions, 0 deletions
diff --git a/drivers/gpu/drm/meson/meson_venc_cvbs.c b/drivers/gpu/drm/meson/meson_venc_cvbs.c new file mode 100644 index 000000000000..c809c085fd78 --- /dev/null +++ b/drivers/gpu/drm/meson/meson_venc_cvbs.c @@ -0,0 +1,293 @@ +/* + * 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_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, 0); +} + +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); + 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(meson_venc_cvbs->priv, + meson_mode->enci); + 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 *ep, *remote; + + /* CVBS VDAC output is on the first port, first endpoint */ + ep = of_graph_get_endpoint_by_regs(priv->dev->of_node, 0, 0); + if (!ep) + return false; + + + /* If the endpoint node exists, consider it enabled */ + remote = of_graph_get_remote_port(ep); + if (remote) { + of_node_put(ep); + return true; + } + + of_node_put(ep); + of_node_put(remote); + + return false; +} + +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 -ENODEV; + } + + 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; +} |