300 lines
8.8 KiB
C
300 lines
8.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2016 BayLibre, SAS
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* Author: Neil Armstrong <narmstrong@baylibre.com>
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* Copyright (C) 2015 Amlogic, Inc. All rights reserved.
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* Copyright (C) 2014 Endless Mobile
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*
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* Written by:
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* Jasper St. Pierre <jstpierre@mecheye.net>
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*/
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#include <linux/export.h>
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#include <linux/of_graph.h>
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_bridge.h>
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#include <drm/drm_bridge_connector.h>
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#include <drm/drm_device.h>
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#include <drm/drm_edid.h>
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#include <drm/drm_probe_helper.h>
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#include <drm/drm_simple_kms_helper.h>
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#include "meson_registers.h"
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#include "meson_vclk.h"
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#include "meson_encoder_cvbs.h"
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/* HHI VDAC Registers */
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#define HHI_VDAC_CNTL0 0x2F4 /* 0xbd offset in data sheet */
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#define HHI_VDAC_CNTL0_G12A 0x2EC /* 0xbd offset in data sheet */
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#define HHI_VDAC_CNTL1 0x2F8 /* 0xbe offset in data sheet */
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#define HHI_VDAC_CNTL1_G12A 0x2F0 /* 0xbe offset in data sheet */
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struct meson_encoder_cvbs {
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struct drm_encoder encoder;
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struct drm_bridge bridge;
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struct drm_bridge *next_bridge;
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struct meson_drm *priv;
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};
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#define bridge_to_meson_encoder_cvbs(x) \
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container_of(x, struct meson_encoder_cvbs, bridge)
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/* Supported Modes */
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struct meson_cvbs_mode meson_cvbs_modes[MESON_CVBS_MODES_COUNT] = {
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{ /* PAL */
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.enci = &meson_cvbs_enci_pal,
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.mode = {
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DRM_MODE("720x576i", DRM_MODE_TYPE_DRIVER, 13500,
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720, 732, 795, 864, 0, 576, 580, 586, 625, 0,
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DRM_MODE_FLAG_INTERLACE),
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.picture_aspect_ratio = HDMI_PICTURE_ASPECT_4_3,
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},
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},
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{ /* NTSC */
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.enci = &meson_cvbs_enci_ntsc,
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.mode = {
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DRM_MODE("720x480i", DRM_MODE_TYPE_DRIVER, 13500,
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720, 739, 801, 858, 0, 480, 488, 494, 525, 0,
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DRM_MODE_FLAG_INTERLACE),
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.picture_aspect_ratio = HDMI_PICTURE_ASPECT_4_3,
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},
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},
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};
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static const struct meson_cvbs_mode *
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meson_cvbs_get_mode(const struct drm_display_mode *req_mode)
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{
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int i;
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for (i = 0; i < MESON_CVBS_MODES_COUNT; ++i) {
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struct meson_cvbs_mode *meson_mode = &meson_cvbs_modes[i];
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if (drm_mode_match(req_mode, &meson_mode->mode,
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DRM_MODE_MATCH_TIMINGS |
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DRM_MODE_MATCH_CLOCK |
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DRM_MODE_MATCH_FLAGS |
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DRM_MODE_MATCH_3D_FLAGS))
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return meson_mode;
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}
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return NULL;
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}
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static int meson_encoder_cvbs_attach(struct drm_bridge *bridge,
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enum drm_bridge_attach_flags flags)
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{
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struct meson_encoder_cvbs *meson_encoder_cvbs =
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bridge_to_meson_encoder_cvbs(bridge);
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return drm_bridge_attach(bridge->encoder, meson_encoder_cvbs->next_bridge,
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&meson_encoder_cvbs->bridge, flags);
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}
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static int meson_encoder_cvbs_get_modes(struct drm_bridge *bridge,
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struct drm_connector *connector)
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{
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struct meson_encoder_cvbs *meson_encoder_cvbs =
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bridge_to_meson_encoder_cvbs(bridge);
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struct meson_drm *priv = meson_encoder_cvbs->priv;
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struct drm_display_mode *mode;
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int i;
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for (i = 0; i < MESON_CVBS_MODES_COUNT; ++i) {
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struct meson_cvbs_mode *meson_mode = &meson_cvbs_modes[i];
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mode = drm_mode_duplicate(priv->drm, &meson_mode->mode);
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if (!mode) {
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dev_err(priv->dev, "Failed to create a new display mode\n");
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return 0;
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}
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drm_mode_probed_add(connector, mode);
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}
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return i;
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}
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static enum drm_mode_status
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meson_encoder_cvbs_mode_valid(struct drm_bridge *bridge,
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const struct drm_display_info *display_info,
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const struct drm_display_mode *mode)
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{
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if (meson_cvbs_get_mode(mode))
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return MODE_OK;
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return MODE_BAD;
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}
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static int meson_encoder_cvbs_atomic_check(struct drm_bridge *bridge,
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struct drm_bridge_state *bridge_state,
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struct drm_crtc_state *crtc_state,
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struct drm_connector_state *conn_state)
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{
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if (meson_cvbs_get_mode(&crtc_state->mode))
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return 0;
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return -EINVAL;
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}
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static void meson_encoder_cvbs_atomic_enable(struct drm_bridge *bridge,
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struct drm_bridge_state *bridge_state)
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{
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struct meson_encoder_cvbs *encoder_cvbs = bridge_to_meson_encoder_cvbs(bridge);
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struct drm_atomic_state *state = bridge_state->base.state;
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struct meson_drm *priv = encoder_cvbs->priv;
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const struct meson_cvbs_mode *meson_mode;
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struct drm_connector_state *conn_state;
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struct drm_crtc_state *crtc_state;
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struct drm_connector *connector;
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connector = drm_atomic_get_new_connector_for_encoder(state, bridge->encoder);
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if (WARN_ON(!connector))
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return;
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conn_state = drm_atomic_get_new_connector_state(state, connector);
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if (WARN_ON(!conn_state))
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return;
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crtc_state = drm_atomic_get_new_crtc_state(state, conn_state->crtc);
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if (WARN_ON(!crtc_state))
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return;
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meson_mode = meson_cvbs_get_mode(&crtc_state->adjusted_mode);
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if (WARN_ON(!meson_mode))
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return;
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meson_venci_cvbs_mode_set(priv, meson_mode->enci);
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/* Setup 27MHz vclk2 for ENCI and VDAC */
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meson_vclk_setup(priv, MESON_VCLK_TARGET_CVBS,
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MESON_VCLK_CVBS, MESON_VCLK_CVBS,
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MESON_VCLK_CVBS, MESON_VCLK_CVBS,
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true);
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/* VDAC0 source is not from ATV */
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writel_bits_relaxed(VENC_VDAC_SEL_ATV_DMD, 0,
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priv->io_base + _REG(VENC_VDAC_DACSEL0));
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if (meson_vpu_is_compatible(priv, VPU_COMPATIBLE_GXBB)) {
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regmap_write(priv->hhi, HHI_VDAC_CNTL0, 1);
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regmap_write(priv->hhi, HHI_VDAC_CNTL1, 0);
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} else if (meson_vpu_is_compatible(priv, VPU_COMPATIBLE_GXM) ||
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meson_vpu_is_compatible(priv, VPU_COMPATIBLE_GXL)) {
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regmap_write(priv->hhi, HHI_VDAC_CNTL0, 0xf0001);
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regmap_write(priv->hhi, HHI_VDAC_CNTL1, 0);
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} else if (meson_vpu_is_compatible(priv, VPU_COMPATIBLE_G12A)) {
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regmap_write(priv->hhi, HHI_VDAC_CNTL0_G12A, 0x906001);
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regmap_write(priv->hhi, HHI_VDAC_CNTL1_G12A, 0);
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}
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}
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static void meson_encoder_cvbs_atomic_disable(struct drm_bridge *bridge,
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struct drm_bridge_state *bridge_state)
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{
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struct meson_encoder_cvbs *meson_encoder_cvbs =
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bridge_to_meson_encoder_cvbs(bridge);
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struct meson_drm *priv = meson_encoder_cvbs->priv;
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/* Disable CVBS VDAC */
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if (meson_vpu_is_compatible(priv, VPU_COMPATIBLE_G12A)) {
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regmap_write(priv->hhi, HHI_VDAC_CNTL0_G12A, 0);
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regmap_write(priv->hhi, HHI_VDAC_CNTL1_G12A, 0);
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} else {
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regmap_write(priv->hhi, HHI_VDAC_CNTL0, 0);
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regmap_write(priv->hhi, HHI_VDAC_CNTL1, 8);
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}
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}
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static const struct drm_bridge_funcs meson_encoder_cvbs_bridge_funcs = {
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.attach = meson_encoder_cvbs_attach,
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.mode_valid = meson_encoder_cvbs_mode_valid,
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.get_modes = meson_encoder_cvbs_get_modes,
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.atomic_enable = meson_encoder_cvbs_atomic_enable,
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.atomic_disable = meson_encoder_cvbs_atomic_disable,
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.atomic_check = meson_encoder_cvbs_atomic_check,
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.atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
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.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
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.atomic_reset = drm_atomic_helper_bridge_reset,
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};
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int meson_encoder_cvbs_init(struct meson_drm *priv)
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{
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struct drm_device *drm = priv->drm;
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struct meson_encoder_cvbs *meson_encoder_cvbs;
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struct drm_connector *connector;
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struct device_node *remote;
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int ret;
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meson_encoder_cvbs = devm_kzalloc(priv->dev, sizeof(*meson_encoder_cvbs), GFP_KERNEL);
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if (!meson_encoder_cvbs)
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return -ENOMEM;
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/* CVBS Connector Bridge */
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remote = of_graph_get_remote_node(priv->dev->of_node, 0, 0);
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if (!remote) {
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dev_info(drm->dev, "CVBS Output connector not available\n");
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return 0;
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}
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meson_encoder_cvbs->next_bridge = of_drm_find_bridge(remote);
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of_node_put(remote);
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if (!meson_encoder_cvbs->next_bridge) {
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dev_err(priv->dev, "Failed to find CVBS Connector bridge\n");
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return -EPROBE_DEFER;
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}
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/* CVBS Encoder Bridge */
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meson_encoder_cvbs->bridge.funcs = &meson_encoder_cvbs_bridge_funcs;
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meson_encoder_cvbs->bridge.of_node = priv->dev->of_node;
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meson_encoder_cvbs->bridge.type = DRM_MODE_CONNECTOR_Composite;
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meson_encoder_cvbs->bridge.ops = DRM_BRIDGE_OP_MODES;
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meson_encoder_cvbs->bridge.interlace_allowed = true;
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drm_bridge_add(&meson_encoder_cvbs->bridge);
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meson_encoder_cvbs->priv = priv;
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/* Encoder */
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ret = drm_simple_encoder_init(priv->drm, &meson_encoder_cvbs->encoder,
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DRM_MODE_ENCODER_TVDAC);
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if (ret) {
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dev_err(priv->dev, "Failed to init CVBS encoder: %d\n", ret);
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return ret;
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}
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meson_encoder_cvbs->encoder.possible_crtcs = BIT(0);
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/* Attach CVBS Encoder Bridge to Encoder */
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ret = drm_bridge_attach(&meson_encoder_cvbs->encoder, &meson_encoder_cvbs->bridge, NULL,
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DRM_BRIDGE_ATTACH_NO_CONNECTOR);
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if (ret) {
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dev_err(priv->dev, "Failed to attach bridge: %d\n", ret);
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return ret;
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}
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/* Initialize & attach Bridge Connector */
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connector = drm_bridge_connector_init(priv->drm, &meson_encoder_cvbs->encoder);
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if (IS_ERR(connector)) {
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dev_err(priv->dev, "Unable to create CVBS bridge connector\n");
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return PTR_ERR(connector);
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}
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drm_connector_attach_encoder(connector, &meson_encoder_cvbs->encoder);
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priv->encoders[MESON_ENC_CVBS] = meson_encoder_cvbs;
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return 0;
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}
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void meson_encoder_cvbs_remove(struct meson_drm *priv)
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{
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struct meson_encoder_cvbs *meson_encoder_cvbs;
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if (priv->encoders[MESON_ENC_CVBS]) {
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meson_encoder_cvbs = priv->encoders[MESON_ENC_CVBS];
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drm_bridge_remove(&meson_encoder_cvbs->bridge);
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drm_bridge_remove(meson_encoder_cvbs->next_bridge);
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}
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}
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