diff options
Diffstat (limited to 'drivers/gpu/drm/meson/meson_encoder_cvbs.c')
| -rw-r--r-- | drivers/gpu/drm/meson/meson_encoder_cvbs.c | 284 |
1 files changed, 284 insertions, 0 deletions
diff --git a/drivers/gpu/drm/meson/meson_encoder_cvbs.c b/drivers/gpu/drm/meson/meson_encoder_cvbs.c new file mode 100644 index 000000000000..fd8db97ba8ba --- /dev/null +++ b/drivers/gpu/drm/meson/meson_encoder_cvbs.c @@ -0,0 +1,284 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2016 BayLibre, SAS + * Author: Neil Armstrong <[email protected]> + * Copyright (C) 2015 Amlogic, Inc. All rights reserved. + * Copyright (C) 2014 Endless Mobile + * + * Written by: + * Jasper St. Pierre <[email protected]> + */ + +#include <linux/export.h> +#include <linux/of_graph.h> + +#include <drm/drm_atomic_helper.h> +#include <drm/drm_bridge.h> +#include <drm/drm_bridge_connector.h> +#include <drm/drm_device.h> +#include <drm/drm_edid.h> +#include <drm/drm_probe_helper.h> +#include <drm/drm_simple_kms_helper.h> + +#include "meson_registers.h" +#include "meson_vclk.h" +#include "meson_encoder_cvbs.h" + +/* HHI VDAC Registers */ +#define HHI_VDAC_CNTL0 0x2F4 /* 0xbd offset in data sheet */ +#define HHI_VDAC_CNTL0_G12A 0x2EC /* 0xbd offset in data sheet */ +#define HHI_VDAC_CNTL1 0x2F8 /* 0xbe offset in data sheet */ +#define HHI_VDAC_CNTL1_G12A 0x2F0 /* 0xbe offset in data sheet */ + +struct meson_encoder_cvbs { + struct drm_encoder encoder; + struct drm_bridge bridge; + struct drm_bridge *next_bridge; + struct meson_drm *priv; +}; + +#define bridge_to_meson_encoder_cvbs(x) \ + container_of(x, struct meson_encoder_cvbs, bridge) + +/* 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), + .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), + .picture_aspect_ratio = HDMI_PICTURE_ASPECT_4_3, + }, + }, +}; + +static const struct meson_cvbs_mode * +meson_cvbs_get_mode(const struct drm_display_mode *req_mode) +{ + int i; + + for (i = 0; i < MESON_CVBS_MODES_COUNT; ++i) { + struct meson_cvbs_mode *meson_mode = &meson_cvbs_modes[i]; + + if (drm_mode_match(req_mode, &meson_mode->mode, + DRM_MODE_MATCH_TIMINGS | + DRM_MODE_MATCH_CLOCK | + DRM_MODE_MATCH_FLAGS | + DRM_MODE_MATCH_3D_FLAGS)) + return meson_mode; + } + + return NULL; +} + +static int meson_encoder_cvbs_attach(struct drm_bridge *bridge, + enum drm_bridge_attach_flags flags) +{ + struct meson_encoder_cvbs *meson_encoder_cvbs = + bridge_to_meson_encoder_cvbs(bridge); + + return drm_bridge_attach(bridge->encoder, meson_encoder_cvbs->next_bridge, + &meson_encoder_cvbs->bridge, flags); +} + +static int meson_encoder_cvbs_get_modes(struct drm_bridge *bridge, + struct drm_connector *connector) +{ + struct meson_encoder_cvbs *meson_encoder_cvbs = + bridge_to_meson_encoder_cvbs(bridge); + struct meson_drm *priv = meson_encoder_cvbs->priv; + 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(priv->drm, &meson_mode->mode); + if (!mode) { + dev_err(priv->dev, "Failed to create a new display mode\n"); + return 0; + } + + drm_mode_probed_add(connector, mode); + } + + return i; +} + +static int meson_encoder_cvbs_mode_valid(struct drm_bridge *bridge, + const struct drm_display_info *display_info, + const struct drm_display_mode *mode) +{ + if (meson_cvbs_get_mode(mode)) + return MODE_OK; + + return MODE_BAD; +} + +static int meson_encoder_cvbs_atomic_check(struct drm_bridge *bridge, + struct drm_bridge_state *bridge_state, + struct drm_crtc_state *crtc_state, + struct drm_connector_state *conn_state) +{ + if (meson_cvbs_get_mode(&crtc_state->mode)) + return 0; + + return -EINVAL; +} + +static void meson_encoder_cvbs_atomic_enable(struct drm_bridge *bridge, + struct drm_bridge_state *bridge_state) +{ + struct meson_encoder_cvbs *encoder_cvbs = bridge_to_meson_encoder_cvbs(bridge); + struct drm_atomic_state *state = bridge_state->base.state; + struct meson_drm *priv = encoder_cvbs->priv; + const struct meson_cvbs_mode *meson_mode; + struct drm_connector_state *conn_state; + struct drm_crtc_state *crtc_state; + struct drm_connector *connector; + + connector = drm_atomic_get_new_connector_for_encoder(state, bridge->encoder); + if (WARN_ON(!connector)) + return; + + conn_state = drm_atomic_get_new_connector_state(state, connector); + if (WARN_ON(!conn_state)) + return; + + crtc_state = drm_atomic_get_new_crtc_state(state, conn_state->crtc); + if (WARN_ON(!crtc_state)) + return; + + meson_mode = meson_cvbs_get_mode(&crtc_state->adjusted_mode); + if (WARN_ON(!meson_mode)) + return; + + 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, MESON_VCLK_CVBS, + true); + + /* VDAC0 source is not from ATV */ + writel_bits_relaxed(VENC_VDAC_SEL_ATV_DMD, 0, + priv->io_base + _REG(VENC_VDAC_DACSEL0)); + + if (meson_vpu_is_compatible(priv, VPU_COMPATIBLE_GXBB)) { + regmap_write(priv->hhi, HHI_VDAC_CNTL0, 1); + regmap_write(priv->hhi, HHI_VDAC_CNTL1, 0); + } else if (meson_vpu_is_compatible(priv, VPU_COMPATIBLE_GXM) || + meson_vpu_is_compatible(priv, VPU_COMPATIBLE_GXL)) { + regmap_write(priv->hhi, HHI_VDAC_CNTL0, 0xf0001); + regmap_write(priv->hhi, HHI_VDAC_CNTL1, 0); + } else if (meson_vpu_is_compatible(priv, VPU_COMPATIBLE_G12A)) { + regmap_write(priv->hhi, HHI_VDAC_CNTL0_G12A, 0x906001); + regmap_write(priv->hhi, HHI_VDAC_CNTL1_G12A, 0); + } +} + +static void meson_encoder_cvbs_atomic_disable(struct drm_bridge *bridge, + struct drm_bridge_state *bridge_state) +{ + struct meson_encoder_cvbs *meson_encoder_cvbs = + bridge_to_meson_encoder_cvbs(bridge); + struct meson_drm *priv = meson_encoder_cvbs->priv; + + /* Disable CVBS VDAC */ + if (meson_vpu_is_compatible(priv, VPU_COMPATIBLE_G12A)) { + regmap_write(priv->hhi, HHI_VDAC_CNTL0_G12A, 0); + regmap_write(priv->hhi, HHI_VDAC_CNTL1_G12A, 0); + } else { + regmap_write(priv->hhi, HHI_VDAC_CNTL0, 0); + regmap_write(priv->hhi, HHI_VDAC_CNTL1, 8); + } +} + +static const struct drm_bridge_funcs meson_encoder_cvbs_bridge_funcs = { + .attach = meson_encoder_cvbs_attach, + .mode_valid = meson_encoder_cvbs_mode_valid, + .get_modes = meson_encoder_cvbs_get_modes, + .atomic_enable = meson_encoder_cvbs_atomic_enable, + .atomic_disable = meson_encoder_cvbs_atomic_disable, + .atomic_check = meson_encoder_cvbs_atomic_check, + .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, + .atomic_reset = drm_atomic_helper_bridge_reset, +}; + +int meson_encoder_cvbs_init(struct meson_drm *priv) +{ + struct drm_device *drm = priv->drm; + struct meson_encoder_cvbs *meson_encoder_cvbs; + struct drm_connector *connector; + struct device_node *remote; + int ret; + + meson_encoder_cvbs = devm_kzalloc(priv->dev, sizeof(*meson_encoder_cvbs), GFP_KERNEL); + if (!meson_encoder_cvbs) + return -ENOMEM; + + /* CVBS Connector Bridge */ + remote = of_graph_get_remote_node(priv->dev->of_node, 0, 0); + if (!remote) { + dev_info(drm->dev, "CVBS Output connector not available\n"); + return 0; + } + + meson_encoder_cvbs->next_bridge = of_drm_find_bridge(remote); + if (!meson_encoder_cvbs->next_bridge) { + dev_err(priv->dev, "Failed to find CVBS Connector bridge\n"); + return -EPROBE_DEFER; + } + + /* CVBS Encoder Bridge */ + meson_encoder_cvbs->bridge.funcs = &meson_encoder_cvbs_bridge_funcs; + meson_encoder_cvbs->bridge.of_node = priv->dev->of_node; + meson_encoder_cvbs->bridge.type = DRM_MODE_CONNECTOR_Composite; + meson_encoder_cvbs->bridge.ops = DRM_BRIDGE_OP_MODES; + meson_encoder_cvbs->bridge.interlace_allowed = true; + + drm_bridge_add(&meson_encoder_cvbs->bridge); + + meson_encoder_cvbs->priv = priv; + + /* Encoder */ + ret = drm_simple_encoder_init(priv->drm, &meson_encoder_cvbs->encoder, + DRM_MODE_ENCODER_TVDAC); + if (ret) { + dev_err(priv->dev, "Failed to init CVBS encoder: %d\n", ret); + return ret; + } + + meson_encoder_cvbs->encoder.possible_crtcs = BIT(0); + + /* Attach CVBS Encoder Bridge to Encoder */ + ret = drm_bridge_attach(&meson_encoder_cvbs->encoder, &meson_encoder_cvbs->bridge, NULL, + DRM_BRIDGE_ATTACH_NO_CONNECTOR); + if (ret) { + dev_err(priv->dev, "Failed to attach bridge: %d\n", ret); + return ret; + } + + /* Initialize & attach Bridge Connector */ + connector = drm_bridge_connector_init(priv->drm, &meson_encoder_cvbs->encoder); + if (IS_ERR(connector)) { + dev_err(priv->dev, "Unable to create CVBS bridge connector\n"); + return PTR_ERR(connector); + } + drm_connector_attach_encoder(connector, &meson_encoder_cvbs->encoder); + + return 0; +} |