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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 11:36:41 +07:00
381ddfe478
Unlike the connector type, the encoder type is unused by userspace. As it is equally unused in the driver, except in a single location where the connector type can be used instead, hardcode it to DRM_MODE_ENCODER_NONE. This allow removing all code that tries to determine (unsuccessfully in case a bridge is used) the encoder type. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
244 lines
6.0 KiB
C
244 lines
6.0 KiB
C
/*
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* rcar_du_encoder.c -- R-Car Display Unit Encoder
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*
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* Copyright (C) 2013-2014 Renesas Electronics Corporation
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*
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* Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/export.h>
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#include <drm/drmP.h>
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#include <drm/drm_crtc.h>
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#include <drm/drm_crtc_helper.h>
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#include <drm/drm_panel.h>
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#include "rcar_du_drv.h"
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#include "rcar_du_encoder.h"
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#include "rcar_du_kms.h"
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#include "rcar_du_lvdscon.h"
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#include "rcar_du_lvdsenc.h"
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/* -----------------------------------------------------------------------------
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* Encoder
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*/
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static void rcar_du_encoder_disable(struct drm_encoder *encoder)
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{
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struct rcar_du_encoder *renc = to_rcar_encoder(encoder);
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if (renc->connector && renc->connector->panel) {
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drm_panel_disable(renc->connector->panel);
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drm_panel_unprepare(renc->connector->panel);
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}
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if (renc->lvds)
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rcar_du_lvdsenc_enable(renc->lvds, encoder->crtc, false);
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}
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static void rcar_du_encoder_enable(struct drm_encoder *encoder)
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{
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struct rcar_du_encoder *renc = to_rcar_encoder(encoder);
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if (renc->lvds)
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rcar_du_lvdsenc_enable(renc->lvds, encoder->crtc, true);
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if (renc->connector && renc->connector->panel) {
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drm_panel_prepare(renc->connector->panel);
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drm_panel_enable(renc->connector->panel);
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}
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}
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static int rcar_du_encoder_atomic_check(struct drm_encoder *encoder,
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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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struct rcar_du_encoder *renc = to_rcar_encoder(encoder);
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struct drm_display_mode *adjusted_mode = &crtc_state->adjusted_mode;
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const struct drm_display_mode *mode = &crtc_state->mode;
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struct drm_connector *connector = conn_state->connector;
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struct drm_device *dev = encoder->dev;
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/*
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* Only panel-related encoder types require validation here, everything
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* else is handled by the bridge drivers.
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*/
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if (connector->connector_type == DRM_MODE_CONNECTOR_LVDS) {
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const struct drm_display_mode *panel_mode;
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if (list_empty(&connector->modes)) {
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dev_dbg(dev->dev, "encoder: empty modes list\n");
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return -EINVAL;
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}
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panel_mode = list_first_entry(&connector->modes,
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struct drm_display_mode, head);
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/* We're not allowed to modify the resolution. */
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if (mode->hdisplay != panel_mode->hdisplay ||
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mode->vdisplay != panel_mode->vdisplay)
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return -EINVAL;
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/*
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* The flat panel mode is fixed, just copy it to the adjusted
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* mode.
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*/
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drm_mode_copy(adjusted_mode, panel_mode);
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}
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if (renc->lvds)
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rcar_du_lvdsenc_atomic_check(renc->lvds, adjusted_mode);
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return 0;
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}
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static void rcar_du_encoder_mode_set(struct drm_encoder *encoder,
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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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struct rcar_du_encoder *renc = to_rcar_encoder(encoder);
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struct drm_display_info *info = &conn_state->connector->display_info;
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enum rcar_lvds_mode mode;
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rcar_du_crtc_route_output(crtc_state->crtc, renc->output);
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if (!renc->lvds) {
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/*
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* The DU driver creates connectors only for the outputs of the
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* internal LVDS encoders.
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*/
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renc->connector = NULL;
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return;
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}
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renc->connector = to_rcar_connector(conn_state->connector);
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if (!info->num_bus_formats || !info->bus_formats) {
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dev_err(encoder->dev->dev, "no LVDS bus format reported\n");
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return;
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}
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switch (info->bus_formats[0]) {
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case MEDIA_BUS_FMT_RGB666_1X7X3_SPWG:
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case MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA:
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mode = RCAR_LVDS_MODE_JEIDA;
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break;
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case MEDIA_BUS_FMT_RGB888_1X7X4_SPWG:
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mode = RCAR_LVDS_MODE_VESA;
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break;
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default:
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dev_err(encoder->dev->dev,
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"unsupported LVDS bus format 0x%04x\n",
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info->bus_formats[0]);
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return;
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}
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if (info->bus_flags & DRM_BUS_FLAG_DATA_LSB_TO_MSB)
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mode |= RCAR_LVDS_MODE_MIRROR;
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rcar_du_lvdsenc_set_mode(renc->lvds, mode);
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}
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static const struct drm_encoder_helper_funcs encoder_helper_funcs = {
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.atomic_mode_set = rcar_du_encoder_mode_set,
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.disable = rcar_du_encoder_disable,
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.enable = rcar_du_encoder_enable,
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.atomic_check = rcar_du_encoder_atomic_check,
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};
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static const struct drm_encoder_funcs encoder_funcs = {
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.destroy = drm_encoder_cleanup,
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};
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int rcar_du_encoder_init(struct rcar_du_device *rcdu,
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enum rcar_du_output output,
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struct device_node *enc_node,
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struct device_node *con_node)
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{
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struct rcar_du_encoder *renc;
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struct drm_encoder *encoder;
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struct drm_bridge *bridge = NULL;
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int ret;
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renc = devm_kzalloc(rcdu->dev, sizeof(*renc), GFP_KERNEL);
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if (renc == NULL)
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return -ENOMEM;
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renc->output = output;
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encoder = rcar_encoder_to_drm_encoder(renc);
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switch (output) {
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case RCAR_DU_OUTPUT_LVDS0:
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renc->lvds = rcdu->lvds[0];
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break;
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case RCAR_DU_OUTPUT_LVDS1:
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renc->lvds = rcdu->lvds[1];
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break;
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default:
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break;
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}
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if (enc_node) {
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dev_dbg(rcdu->dev, "initializing encoder %s for output %u\n",
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of_node_full_name(enc_node), output);
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/* Locate the DRM bridge from the encoder DT node. */
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bridge = of_drm_find_bridge(enc_node);
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if (!bridge) {
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ret = -EPROBE_DEFER;
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goto done;
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}
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} else {
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dev_dbg(rcdu->dev,
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"initializing internal encoder for output %u\n",
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output);
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}
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ret = drm_encoder_init(rcdu->ddev, encoder, &encoder_funcs,
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DRM_MODE_ENCODER_NONE, NULL);
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if (ret < 0)
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goto done;
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drm_encoder_helper_add(encoder, &encoder_helper_funcs);
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if (bridge) {
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/*
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* Attach the bridge to the encoder. The bridge will create the
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* connector.
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*/
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ret = drm_bridge_attach(encoder, bridge, NULL);
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if (ret) {
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drm_encoder_cleanup(encoder);
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return ret;
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}
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} else {
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/* There's no bridge, create the connector manually. */
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switch (output) {
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case RCAR_DU_OUTPUT_LVDS0:
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case RCAR_DU_OUTPUT_LVDS1:
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ret = rcar_du_lvds_connector_init(rcdu, renc, con_node);
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break;
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default:
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ret = -EINVAL;
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break;
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}
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}
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done:
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if (ret < 0) {
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if (encoder->name)
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encoder->funcs->destroy(encoder);
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devm_kfree(rcdu->dev, renc);
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}
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return ret;
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}
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