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![Jianwei Wang](/assets/img/avatar_default.png)
This patch add support for Two Dimensional Animation and Compositing Engine (2D-ACE) on the Freescale SoCs. 2D-ACE is a Freescale display controller. 2D-ACE describes the functionality of the module extremely well its name is a value that cannot be used as a token in programming languages. Instead the valid token "DCU" is used to tag the register names and function names. The Display Controller Unit (DCU) module is a system master that fetches graphics stored in internal or external memory and displays them on a TFT LCD panel. A wide range of panel sizes is supported and the timing of the interface signals is highly configurable. Graphics are read directly from memory and then blended in real-time, which allows for dynamic content creation with minimal CPU intervention. The features: (1) Full RGB888 output to TFT LCD panel. (2) Blending of each pixel using up to 4 source layers dependent on size of panel. (3) Each graphic layer can be placed with one pixel resolution in either axis. (4) Each graphic layer support RGB565 and RGB888 direct colors without alpha channel and BGRA8888 BGRA4444 ARGB1555 direct colors with an alpha channel and YUV422 format. (5) Each graphic layer support alpha blending with 8-bit resolution. This is a simplified version, only one primary plane, one framebuffer, one crtc, one connector and one encoder for TFT LCD panel. Signed-off-by: Alison Wang <b18965@freescale.com> Signed-off-by: Xiubo Li <lixiubo@cmss.chinamobile.com> Signed-off-by: Jianwei Wang <jianwei.wang.chn@gmail.com> Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
182 lines
4.7 KiB
C
182 lines
4.7 KiB
C
/*
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* Copyright 2015 Freescale Semiconductor, Inc.
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*
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* Freescale DCU drm device driver
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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/backlight.h>
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#include <drm/drmP.h>
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#include <drm/drm_atomic_helper.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 "fsl_dcu_drm_drv.h"
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static int
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fsl_dcu_drm_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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return 0;
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}
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static void fsl_dcu_drm_encoder_disable(struct drm_encoder *encoder)
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{
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}
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static void fsl_dcu_drm_encoder_enable(struct drm_encoder *encoder)
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{
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}
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static const struct drm_encoder_helper_funcs encoder_helper_funcs = {
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.atomic_check = fsl_dcu_drm_encoder_atomic_check,
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.disable = fsl_dcu_drm_encoder_disable,
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.enable = fsl_dcu_drm_encoder_enable,
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};
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static void fsl_dcu_drm_encoder_destroy(struct drm_encoder *encoder)
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{
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drm_encoder_cleanup(encoder);
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}
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static const struct drm_encoder_funcs encoder_funcs = {
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.destroy = fsl_dcu_drm_encoder_destroy,
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};
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int fsl_dcu_drm_encoder_create(struct fsl_dcu_drm_device *fsl_dev,
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struct drm_crtc *crtc)
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{
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struct drm_encoder *encoder = &fsl_dev->encoder;
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int ret;
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encoder->possible_crtcs = 1;
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ret = drm_encoder_init(fsl_dev->drm, encoder, &encoder_funcs,
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DRM_MODE_ENCODER_LVDS);
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if (ret < 0)
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return ret;
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drm_encoder_helper_add(encoder, &encoder_helper_funcs);
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return 0;
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}
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static void fsl_dcu_drm_connector_destroy(struct drm_connector *connector)
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{
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drm_connector_unregister(connector);
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drm_connector_cleanup(connector);
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}
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static enum drm_connector_status
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fsl_dcu_drm_connector_detect(struct drm_connector *connector, bool force)
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{
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return connector_status_connected;
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}
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static const struct drm_connector_funcs fsl_dcu_drm_connector_funcs = {
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.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
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.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
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.destroy = fsl_dcu_drm_connector_destroy,
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.detect = fsl_dcu_drm_connector_detect,
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.dpms = drm_atomic_helper_connector_dpms,
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.fill_modes = drm_helper_probe_single_connector_modes,
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.reset = drm_atomic_helper_connector_reset,
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};
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static struct drm_encoder *
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fsl_dcu_drm_connector_best_encoder(struct drm_connector *connector)
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{
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struct fsl_dcu_drm_connector *fsl_con = to_fsl_dcu_connector(connector);
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return fsl_con->encoder;
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}
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static int fsl_dcu_drm_connector_get_modes(struct drm_connector *connector)
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{
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struct fsl_dcu_drm_connector *fsl_connector;
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int (*get_modes)(struct drm_panel *panel);
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int num_modes = 0;
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fsl_connector = to_fsl_dcu_connector(connector);
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if (fsl_connector->panel && fsl_connector->panel->funcs &&
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fsl_connector->panel->funcs->get_modes) {
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get_modes = fsl_connector->panel->funcs->get_modes;
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num_modes = get_modes(fsl_connector->panel);
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}
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return num_modes;
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}
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static int fsl_dcu_drm_connector_mode_valid(struct drm_connector *connector,
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struct drm_display_mode *mode)
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{
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if (mode->hdisplay & 0xf)
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return MODE_ERROR;
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return MODE_OK;
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}
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static const struct drm_connector_helper_funcs connector_helper_funcs = {
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.best_encoder = fsl_dcu_drm_connector_best_encoder,
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.get_modes = fsl_dcu_drm_connector_get_modes,
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.mode_valid = fsl_dcu_drm_connector_mode_valid,
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};
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int fsl_dcu_drm_connector_create(struct fsl_dcu_drm_device *fsl_dev,
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struct drm_encoder *encoder)
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{
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struct drm_connector *connector = &fsl_dev->connector.base;
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struct drm_mode_config mode_config = fsl_dev->drm->mode_config;
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struct device_node *panel_node;
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int ret;
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fsl_dev->connector.encoder = encoder;
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ret = drm_connector_init(fsl_dev->drm, connector,
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&fsl_dcu_drm_connector_funcs,
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DRM_MODE_CONNECTOR_LVDS);
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if (ret < 0)
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return ret;
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drm_connector_helper_add(connector, &connector_helper_funcs);
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ret = drm_connector_register(connector);
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if (ret < 0)
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goto err_cleanup;
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ret = drm_mode_connector_attach_encoder(connector, encoder);
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if (ret < 0)
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goto err_sysfs;
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drm_object_property_set_value(&connector->base,
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mode_config.dpms_property,
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DRM_MODE_DPMS_OFF);
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panel_node = of_parse_phandle(fsl_dev->np, "fsl,panel", 0);
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if (panel_node) {
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fsl_dev->connector.panel = of_drm_find_panel(panel_node);
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if (!fsl_dev->connector.panel) {
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ret = -EPROBE_DEFER;
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goto err_sysfs;
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}
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of_node_put(panel_node);
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}
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ret = drm_panel_attach(fsl_dev->connector.panel, connector);
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if (ret) {
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dev_err(fsl_dev->dev, "failed to attach panel\n");
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goto err_sysfs;
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}
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return 0;
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err_sysfs:
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drm_connector_unregister(connector);
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err_cleanup:
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drm_connector_cleanup(connector);
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return ret;
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}
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