![Laurent Pinchart](/assets/img/avatar_default.png)
Implement support for the R-Car DU DT bindings in the rcar-du DRM driver. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
206 lines
5.2 KiB
C
206 lines
5.2 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 "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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#include "rcar_du_vgacon.h"
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/* -----------------------------------------------------------------------------
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* Common connector functions
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*/
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struct drm_encoder *
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rcar_du_connector_best_encoder(struct drm_connector *connector)
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{
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struct rcar_du_connector *rcon = to_rcar_connector(connector);
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return &rcon->encoder->encoder;
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}
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/* -----------------------------------------------------------------------------
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* Encoder
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*/
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static void rcar_du_encoder_dpms(struct drm_encoder *encoder, int mode)
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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_dpms(renc->lvds, encoder->crtc, mode);
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}
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static bool rcar_du_encoder_mode_fixup(struct drm_encoder *encoder,
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const struct drm_display_mode *mode,
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struct drm_display_mode *adjusted_mode)
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{
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struct rcar_du_encoder *renc = to_rcar_encoder(encoder);
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const struct drm_display_mode *panel_mode;
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struct drm_device *dev = encoder->dev;
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struct drm_connector *connector;
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bool found = false;
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/* DAC encoders have currently no restriction on the mode. */
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if (encoder->encoder_type == DRM_MODE_ENCODER_DAC)
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return true;
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list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
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if (connector->encoder == encoder) {
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found = true;
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break;
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}
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}
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if (!found) {
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dev_dbg(dev->dev, "mode_fixup: no connector found\n");
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return false;
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}
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if (list_empty(&connector->modes)) {
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dev_dbg(dev->dev, "mode_fixup: empty modes list\n");
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return false;
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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 false;
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/* The flat panel mode is fixed, just copy it to the adjusted mode. */
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drm_mode_copy(adjusted_mode, panel_mode);
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/* The internal LVDS encoder has a clock frequency operating range of
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* 30MHz to 150MHz. Clamp the clock accordingly.
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*/
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if (renc->lvds)
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adjusted_mode->clock = clamp(adjusted_mode->clock,
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30000, 150000);
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return true;
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}
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static void rcar_du_encoder_mode_prepare(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_dpms(renc->lvds, encoder->crtc,
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DRM_MODE_DPMS_OFF);
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}
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static void rcar_du_encoder_mode_commit(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_dpms(renc->lvds, encoder->crtc,
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DRM_MODE_DPMS_ON);
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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_display_mode *mode,
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struct drm_display_mode *adjusted_mode)
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{
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struct rcar_du_encoder *renc = to_rcar_encoder(encoder);
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rcar_du_crtc_route_output(encoder->crtc, renc->output);
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}
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static const struct drm_encoder_helper_funcs encoder_helper_funcs = {
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.dpms = rcar_du_encoder_dpms,
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.mode_fixup = rcar_du_encoder_mode_fixup,
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.prepare = rcar_du_encoder_mode_prepare,
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.commit = rcar_du_encoder_mode_commit,
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.mode_set = rcar_du_encoder_mode_set,
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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_encoder_type type,
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enum rcar_du_output output,
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const struct rcar_du_encoder_data *data,
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struct device_node *np)
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{
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struct rcar_du_encoder *renc;
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unsigned int encoder_type;
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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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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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switch (type) {
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case RCAR_DU_ENCODER_VGA:
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encoder_type = DRM_MODE_ENCODER_DAC;
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break;
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case RCAR_DU_ENCODER_LVDS:
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encoder_type = DRM_MODE_ENCODER_LVDS;
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break;
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case RCAR_DU_ENCODER_NONE:
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default:
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/* No external encoder, use the internal encoder type. */
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encoder_type = rcdu->info->routes[output].encoder_type;
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break;
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}
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ret = drm_encoder_init(rcdu->ddev, &renc->encoder, &encoder_funcs,
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encoder_type);
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if (ret < 0)
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return ret;
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drm_encoder_helper_add(&renc->encoder, &encoder_helper_funcs);
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switch (encoder_type) {
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case DRM_MODE_ENCODER_LVDS: {
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const struct rcar_du_panel_data *pdata =
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data ? &data->connector.lvds.panel : NULL;
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return rcar_du_lvds_connector_init(rcdu, renc, pdata, np);
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}
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case DRM_MODE_ENCODER_DAC:
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return rcar_du_vga_connector_init(rcdu, renc);
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default:
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return -EINVAL;
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}
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}
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