cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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fsl_dcu_drm_rgb.c (3546B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 * Copyright 2015 Freescale Semiconductor, Inc.
      4 *
      5 * Freescale DCU drm device driver
      6 */
      7
      8#include <linux/backlight.h>
      9#include <linux/of_graph.h>
     10
     11#include <drm/drm_atomic_helper.h>
     12#include <drm/drm_bridge.h>
     13#include <drm/drm_of.h>
     14#include <drm/drm_panel.h>
     15#include <drm/drm_probe_helper.h>
     16#include <drm/drm_simple_kms_helper.h>
     17
     18#include "fsl_dcu_drm_drv.h"
     19#include "fsl_tcon.h"
     20
     21int fsl_dcu_drm_encoder_create(struct fsl_dcu_drm_device *fsl_dev,
     22			       struct drm_crtc *crtc)
     23{
     24	struct drm_encoder *encoder = &fsl_dev->encoder;
     25	int ret;
     26
     27	encoder->possible_crtcs = 1;
     28
     29	/* Use bypass mode for parallel RGB/LVDS encoder */
     30	if (fsl_dev->tcon)
     31		fsl_tcon_bypass_enable(fsl_dev->tcon);
     32
     33	ret = drm_simple_encoder_init(fsl_dev->drm, encoder,
     34				      DRM_MODE_ENCODER_LVDS);
     35	if (ret < 0)
     36		return ret;
     37
     38	return 0;
     39}
     40
     41static void fsl_dcu_drm_connector_destroy(struct drm_connector *connector)
     42{
     43	drm_connector_unregister(connector);
     44	drm_connector_cleanup(connector);
     45}
     46
     47static const struct drm_connector_funcs fsl_dcu_drm_connector_funcs = {
     48	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
     49	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
     50	.destroy = fsl_dcu_drm_connector_destroy,
     51	.fill_modes = drm_helper_probe_single_connector_modes,
     52	.reset = drm_atomic_helper_connector_reset,
     53};
     54
     55static int fsl_dcu_drm_connector_get_modes(struct drm_connector *connector)
     56{
     57	struct fsl_dcu_drm_connector *fsl_connector;
     58
     59	fsl_connector = to_fsl_dcu_connector(connector);
     60	return drm_panel_get_modes(fsl_connector->panel, connector);
     61}
     62
     63static int fsl_dcu_drm_connector_mode_valid(struct drm_connector *connector,
     64					    struct drm_display_mode *mode)
     65{
     66	if (mode->hdisplay & 0xf)
     67		return MODE_ERROR;
     68
     69	return MODE_OK;
     70}
     71
     72static const struct drm_connector_helper_funcs connector_helper_funcs = {
     73	.get_modes = fsl_dcu_drm_connector_get_modes,
     74	.mode_valid = fsl_dcu_drm_connector_mode_valid,
     75};
     76
     77static int fsl_dcu_attach_panel(struct fsl_dcu_drm_device *fsl_dev,
     78				 struct drm_panel *panel)
     79{
     80	struct drm_encoder *encoder = &fsl_dev->encoder;
     81	struct drm_connector *connector = &fsl_dev->connector.base;
     82	int ret;
     83
     84	fsl_dev->connector.encoder = encoder;
     85
     86	ret = drm_connector_init(fsl_dev->drm, connector,
     87				 &fsl_dcu_drm_connector_funcs,
     88				 DRM_MODE_CONNECTOR_LVDS);
     89	if (ret < 0)
     90		return ret;
     91
     92	drm_connector_helper_add(connector, &connector_helper_funcs);
     93	ret = drm_connector_register(connector);
     94	if (ret < 0)
     95		goto err_cleanup;
     96
     97	ret = drm_connector_attach_encoder(connector, encoder);
     98	if (ret < 0)
     99		goto err_sysfs;
    100
    101	return 0;
    102
    103err_sysfs:
    104	drm_connector_unregister(connector);
    105err_cleanup:
    106	drm_connector_cleanup(connector);
    107	return ret;
    108}
    109
    110int fsl_dcu_create_outputs(struct fsl_dcu_drm_device *fsl_dev)
    111{
    112	struct device_node *panel_node;
    113	struct drm_panel *panel;
    114	struct drm_bridge *bridge;
    115	int ret;
    116
    117	/* This is for backward compatibility */
    118	panel_node = of_parse_phandle(fsl_dev->np, "fsl,panel", 0);
    119	if (panel_node) {
    120		fsl_dev->connector.panel = of_drm_find_panel(panel_node);
    121		of_node_put(panel_node);
    122		if (IS_ERR(fsl_dev->connector.panel))
    123			return PTR_ERR(fsl_dev->connector.panel);
    124
    125		return fsl_dcu_attach_panel(fsl_dev, fsl_dev->connector.panel);
    126	}
    127
    128	ret = drm_of_find_panel_or_bridge(fsl_dev->np, 0, 0, &panel, &bridge);
    129	if (ret)
    130		return ret;
    131
    132	if (panel) {
    133		fsl_dev->connector.panel = panel;
    134		return fsl_dcu_attach_panel(fsl_dev, panel);
    135	}
    136
    137	return drm_bridge_attach(&fsl_dev->encoder, bridge, NULL, 0);
    138}