litmus-rt.git - The LITMUS^RT kernel.

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Diffstat (limited to 'lib/vsprintf.c')

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/* * i.MX drm driver - parallel display implementation * * Copyright (C) 2012 Sascha Hauer, Pengutronix * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include <linux/component.h> #include <linux/module.h> #include <drm/drmP.h> #include <drm/drm_fb_helper.h> #include <drm/drm_crtc_helper.h> #include <drm/drm_panel.h> #include <linux/videodev2.h> #include <video/of_display_timing.h> #include "imx-drm.h" #define con_to_imxpd(x) container_of(x, struct imx_parallel_display, connector) #define enc_to_imxpd(x) container_of(x, struct imx_parallel_display, encoder) struct imx_parallel_display { struct drm_connector connector; struct drm_encoder encoder; struct device *dev; void *edid; int edid_len; u32 interface_pix_fmt; int mode_valid; struct drm_display_mode mode; struct drm_panel *panel; }; static enum drm_connector_status imx_pd_connector_detect( struct drm_connector *connector, bool force) { return connector_status_connected; } static int imx_pd_connector_get_modes(struct drm_connector *connector) { struct imx_parallel_display *imxpd = con_to_imxpd(connector); struct device_node *np = imxpd->dev->of_node; int num_modes = 0; if (imxpd->panel && imxpd->panel->funcs && imxpd->panel->funcs->get_modes) { num_modes = imxpd->panel->funcs->get_modes(imxpd->panel); if (num_modes > 0) return num_modes; } if (imxpd->edid) { drm_mode_connector_update_edid_property(connector, imxpd->edid); num_modes = drm_add_edid_modes(connector, imxpd->edid); } if (imxpd->mode_valid) { struct drm_display_mode *mode = drm_mode_create(connector->dev); if (!mode) return -EINVAL; drm_mode_copy(mode, &imxpd->mode); mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED, drm_mode_probed_add(connector, mode); num_modes++; } if (np) { struct drm_display_mode *mode = drm_mode_create(connector->dev); if (!mode) return -EINVAL; of_get_drm_display_mode(np, &imxpd->mode, OF_USE_NATIVE_MODE); drm_mode_copy(mode, &imxpd->mode); mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED, drm_mode_probed_add(connector, mode); num_modes++; } return num_modes; } static struct drm_encoder *imx_pd_connector_best_encoder( struct drm_connector *connector) { struct imx_parallel_display *imxpd = con_to_imxpd(connector); return &imxpd->encoder; } static void imx_pd_encoder_dpms(struct drm_encoder *encoder, int mode) { struct imx_parallel_display *imxpd = enc_to_imxpd(encoder); if (mode != DRM_MODE_DPMS_ON) drm_panel_disable(imxpd->panel); else drm_panel_enable(imxpd->panel); } static bool imx_pd_encoder_mode_fixup(struct drm_encoder *encoder, const struct drm_display_mode *mode, struct drm_display_mode *adjusted_mode) { return true; } static void imx_pd_encoder_prepare(struct drm_encoder *encoder) { struct imx_parallel_display *imxpd = enc_to_imxpd(encoder); imx_drm_panel_format(encoder, imxpd->interface_pix_fmt); } static void imx_pd_encoder_commit(struct drm_encoder *encoder) { struct imx_parallel_display *imxpd = enc_to_imxpd(encoder); drm_panel_prepare(imxpd->panel); drm_panel_enable(imxpd->panel); } static void imx_pd_encoder_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode, struct drm_display_mode *adjusted_mode) { } static void imx_pd_encoder_disable(struct drm_encoder *encoder) { struct imx_parallel_display *imxpd = enc_to_imxpd(encoder); drm_panel_disable(imxpd->panel); drm_panel_unprepare(imxpd->panel); } static struct drm_connector_funcs imx_pd_connector_funcs = { .dpms = drm_helper_connector_dpms, .fill_modes = drm_helper_probe_single_connector_modes, .detect = imx_pd_connector_detect, .destroy = imx_drm_connector_destroy, }; static struct drm_connector_helper_funcs imx_pd_connector_helper_funcs = { .get_modes = imx_pd_connector_get_modes, .best_encoder = imx_pd_connector_best_encoder, }; static struct drm_encoder_funcs imx_pd_encoder_funcs = { .destroy = imx_drm_encoder_destroy, }; static struct drm_encoder_helper_funcs imx_pd_encoder_helper_funcs = { .dpms = imx_pd_encoder_dpms, .mode_fixup = imx_pd_encoder_mode_fixup, .prepare = imx_pd_encoder_prepare, .commit = imx_pd_encoder_commit, .mode_set = imx_pd_encoder_mode_set, .disable = imx_pd_encoder_disable, }; static int imx_pd_register(struct drm_device *drm, struct imx_parallel_display *imxpd) { int ret; ret = imx_drm_encoder_parse_of(drm, &imxpd->encoder, imxpd->dev->of_node); if (ret) return ret; /* set the connector's dpms to OFF so that * drm_helper_connector_dpms() won't return * immediately since the current state is ON * at this point. */ imxpd->connector.dpms = DRM_MODE_DPMS_OFF; drm_encoder_helper_add(&imxpd->encoder, &imx_pd_encoder_helper_funcs); drm_encoder_init(drm, &imxpd->encoder, &imx_pd_encoder_funcs, DRM_MODE_ENCODER_NONE); drm_connector_helper_add(&imxpd->connector, &imx_pd_connector_helper_funcs); drm_connector_init(drm, &imxpd->connector, &imx_pd_connector_funcs, DRM_MODE_CONNECTOR_VGA); if (imxpd->panel) drm_panel_attach(imxpd->panel, &imxpd->connector); drm_mode_connector_attach_encoder(&imxpd->connector, &imxpd->encoder); imxpd->connector.encoder = &imxpd->encoder; return 0; } static int imx_pd_bind(struct device *dev, struct device *master, void *data) { struct drm_device *drm = data; struct device_node *np = dev->of_node; struct device_node *panel_node; const u8 *edidp; struct imx_parallel_display *imxpd; int ret; const char *fmt; imxpd = devm_kzalloc(dev, sizeof(*imxpd), GFP_KERNEL); if (!imxpd) return -ENOMEM; edidp = of_get_property(np, "edid", &imxpd->edid_len); if (edidp) imxpd->edid = kmemdup(edidp, imxpd->edid_len, GFP_KERNEL); ret = of_property_read_string(np, "interface-pix-fmt", &fmt); if (!ret) { if (!strcmp(fmt, "rgb24")) imxpd->interface_pix_fmt = V4L2_PIX_FMT_RGB24; else if (!strcmp(fmt, "rgb565")) imxpd->interface_pix_fmt = V4L2_PIX_FMT_RGB565; else if (!strcmp(fmt, "bgr666")) imxpd->interface_pix_fmt = V4L2_PIX_FMT_BGR666; else if (!strcmp(fmt, "lvds666")) imxpd->interface_pix_fmt = v4l2_fourcc('L', 'V', 'D', '6'); } panel_node = of_parse_phandle(np, "fsl,panel", 0); if (panel_node) imxpd->panel = of_drm_find_panel(panel_node); imxpd->dev = dev; ret = imx_pd_register(drm, imxpd); if (ret) return ret; dev_set_drvdata(dev, imxpd); return 0; } static void imx_pd_unbind(struct device *dev, struct device *master, void *data) { struct imx_parallel_display *imxpd = dev_get_drvdata(dev); imxpd->encoder.funcs->destroy(&imxpd->encoder); imxpd->connector.funcs->destroy(&imxpd->connector); } static const struct component_ops imx_pd_ops = { .bind = imx_pd_bind, .unbind = imx_pd_unbind, }; static int imx_pd_probe(struct platform_device *pdev) { return component_add(&pdev->dev, &imx_pd_ops); } static int imx_pd_remove(struct platform_device *pdev) { component_del(&pdev->dev, &imx_pd_ops); return 0; } static const struct of_device_id imx_pd_dt_ids[] = { { .compatible = "fsl,imx-parallel-display", }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, imx_pd_dt_ids); static struct platform_driver imx_pd_driver = { .probe = imx_pd_probe, .remove = imx_pd_remove, .driver = { .of_match_table = imx_pd_dt_ids, .name = "imx-parallel-display", }, }; module_platform_driver(imx_pd_driver); MODULE_DESCRIPTION("i.MX parallel display driver"); MODULE_AUTHOR("Sascha Hauer, Pengutronix"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:imx-parallel-display");


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