2012-09-21 10:07:48 +02:00
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/*
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* i.MX drm driver - parallel display implementation
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*
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* Copyright (C) 2012 Sascha Hauer, Pengutronix
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*/
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#include <linux/module.h>
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#include <drm/drmP.h>
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#include <drm/drm_fb_helper.h>
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#include <drm/drm_crtc_helper.h>
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#include <linux/videodev2.h>
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#include "imx-drm.h"
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#define con_to_imxpd(x) container_of(x, struct imx_parallel_display, connector)
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#define enc_to_imxpd(x) container_of(x, struct imx_parallel_display, encoder)
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struct imx_parallel_display {
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struct drm_connector connector;
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struct imx_drm_connector *imx_drm_connector;
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struct drm_encoder encoder;
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struct imx_drm_encoder *imx_drm_encoder;
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struct device *dev;
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void *edid;
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int edid_len;
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u32 interface_pix_fmt;
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int mode_valid;
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struct drm_display_mode mode;
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};
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static enum drm_connector_status imx_pd_connector_detect(
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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 void imx_pd_connector_destroy(struct drm_connector *connector)
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{
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/* do not free here */
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}
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static int imx_pd_connector_get_modes(struct drm_connector *connector)
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{
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struct imx_parallel_display *imxpd = con_to_imxpd(connector);
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2013-04-03 17:36:28 +02:00
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struct device_node *np = imxpd->dev->of_node;
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2012-09-21 10:07:48 +02:00
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int num_modes = 0;
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if (imxpd->edid) {
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drm_mode_connector_update_edid_property(connector, imxpd->edid);
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num_modes = drm_add_edid_modes(connector, imxpd->edid);
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}
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if (imxpd->mode_valid) {
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struct drm_display_mode *mode = drm_mode_create(connector->dev);
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drm_mode_copy(mode, &imxpd->mode);
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mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
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2013-04-03 17:36:28 +02:00
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drm_mode_probed_add(connector, mode);
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num_modes++;
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}
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if (np) {
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struct drm_display_mode *mode = drm_mode_create(connector->dev);
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of_get_drm_display_mode(np, &imxpd->mode, 0);
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drm_mode_copy(mode, &imxpd->mode);
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mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
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2012-09-21 10:07:48 +02:00
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drm_mode_probed_add(connector, mode);
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num_modes++;
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}
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return num_modes;
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}
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static int imx_pd_connector_mode_valid(struct drm_connector *connector,
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struct drm_display_mode *mode)
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{
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return 0;
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}
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static struct drm_encoder *imx_pd_connector_best_encoder(
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struct drm_connector *connector)
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{
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struct imx_parallel_display *imxpd = con_to_imxpd(connector);
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return &imxpd->encoder;
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}
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static void imx_pd_encoder_dpms(struct drm_encoder *encoder, int mode)
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{
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}
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static bool imx_pd_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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return true;
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}
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static void imx_pd_encoder_prepare(struct drm_encoder *encoder)
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{
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struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);
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imx_drm_crtc_panel_format(encoder->crtc, DRM_MODE_ENCODER_NONE,
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imxpd->interface_pix_fmt);
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}
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static void imx_pd_encoder_commit(struct drm_encoder *encoder)
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{
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}
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static void imx_pd_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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}
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static void imx_pd_encoder_disable(struct drm_encoder *encoder)
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{
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}
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static void imx_pd_encoder_destroy(struct drm_encoder *encoder)
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{
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/* do not free here */
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}
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static struct drm_connector_funcs imx_pd_connector_funcs = {
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.dpms = drm_helper_connector_dpms,
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.fill_modes = drm_helper_probe_single_connector_modes,
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.detect = imx_pd_connector_detect,
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.destroy = imx_pd_connector_destroy,
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};
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static struct drm_connector_helper_funcs imx_pd_connector_helper_funcs = {
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.get_modes = imx_pd_connector_get_modes,
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.best_encoder = imx_pd_connector_best_encoder,
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.mode_valid = imx_pd_connector_mode_valid,
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};
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static struct drm_encoder_funcs imx_pd_encoder_funcs = {
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.destroy = imx_pd_encoder_destroy,
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};
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static struct drm_encoder_helper_funcs imx_pd_encoder_helper_funcs = {
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.dpms = imx_pd_encoder_dpms,
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.mode_fixup = imx_pd_encoder_mode_fixup,
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.prepare = imx_pd_encoder_prepare,
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.commit = imx_pd_encoder_commit,
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.mode_set = imx_pd_encoder_mode_set,
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.disable = imx_pd_encoder_disable,
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};
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static int imx_pd_register(struct imx_parallel_display *imxpd)
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{
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int ret;
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drm_mode_connector_attach_encoder(&imxpd->connector, &imxpd->encoder);
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imxpd->connector.funcs = &imx_pd_connector_funcs;
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imxpd->encoder.funcs = &imx_pd_encoder_funcs;
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imxpd->encoder.encoder_type = DRM_MODE_ENCODER_NONE;
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imxpd->connector.connector_type = DRM_MODE_CONNECTOR_VGA;
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drm_encoder_helper_add(&imxpd->encoder, &imx_pd_encoder_helper_funcs);
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ret = imx_drm_add_encoder(&imxpd->encoder, &imxpd->imx_drm_encoder,
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THIS_MODULE);
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if (ret) {
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dev_err(imxpd->dev, "adding encoder failed with %d\n", ret);
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return ret;
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}
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drm_connector_helper_add(&imxpd->connector,
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&imx_pd_connector_helper_funcs);
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ret = imx_drm_add_connector(&imxpd->connector,
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&imxpd->imx_drm_connector, THIS_MODULE);
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if (ret) {
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imx_drm_remove_encoder(imxpd->imx_drm_encoder);
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dev_err(imxpd->dev, "adding connector failed with %d\n", ret);
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return ret;
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}
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imxpd->connector.encoder = &imxpd->encoder;
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return 0;
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}
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2012-11-19 19:22:11 +01:00
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static int imx_pd_probe(struct platform_device *pdev)
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2012-09-21 10:07:48 +02:00
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{
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struct device_node *np = pdev->dev.of_node;
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const u8 *edidp;
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struct imx_parallel_display *imxpd;
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int ret;
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const char *fmt;
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imxpd = devm_kzalloc(&pdev->dev, sizeof(*imxpd), GFP_KERNEL);
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if (!imxpd)
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return -ENOMEM;
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edidp = of_get_property(np, "edid", &imxpd->edid_len);
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if (edidp)
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imxpd->edid = kmemdup(edidp, imxpd->edid_len, GFP_KERNEL);
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ret = of_property_read_string(np, "interface-pix-fmt", &fmt);
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if (!ret) {
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if (!strcmp(fmt, "rgb24"))
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imxpd->interface_pix_fmt = V4L2_PIX_FMT_RGB24;
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else if (!strcmp(fmt, "rgb565"))
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imxpd->interface_pix_fmt = V4L2_PIX_FMT_RGB565;
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2013-04-22 23:19:31 +02:00
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else if (!strcmp(fmt, "bgr666"))
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imxpd->interface_pix_fmt = V4L2_PIX_FMT_BGR666;
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2012-09-21 10:07:48 +02:00
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}
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imxpd->dev = &pdev->dev;
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ret = imx_pd_register(imxpd);
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if (ret)
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return ret;
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ret = imx_drm_encoder_add_possible_crtcs(imxpd->imx_drm_encoder, np);
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platform_set_drvdata(pdev, imxpd);
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return 0;
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}
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2012-11-19 19:26:38 +01:00
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static int imx_pd_remove(struct platform_device *pdev)
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2012-09-21 10:07:48 +02:00
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{
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struct imx_parallel_display *imxpd = platform_get_drvdata(pdev);
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struct drm_connector *connector = &imxpd->connector;
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struct drm_encoder *encoder = &imxpd->encoder;
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drm_mode_connector_detach_encoder(connector, encoder);
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imx_drm_remove_connector(imxpd->imx_drm_connector);
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imx_drm_remove_encoder(imxpd->imx_drm_encoder);
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return 0;
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}
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static const struct of_device_id imx_pd_dt_ids[] = {
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{ .compatible = "fsl,imx-parallel-display", },
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{ /* sentinel */ }
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};
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2013-06-07 11:36:46 +02:00
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MODULE_DEVICE_TABLE(of, imx_pd_dt_ids);
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2012-09-21 10:07:48 +02:00
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static struct platform_driver imx_pd_driver = {
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.probe = imx_pd_probe,
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2012-11-19 19:20:51 +01:00
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.remove = imx_pd_remove,
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2012-09-21 10:07:48 +02:00
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.driver = {
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.of_match_table = imx_pd_dt_ids,
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.name = "imx-parallel-display",
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.owner = THIS_MODULE,
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},
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};
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module_platform_driver(imx_pd_driver);
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MODULE_DESCRIPTION("i.MX parallel display driver");
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MODULE_AUTHOR("Sascha Hauer, Pengutronix");
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MODULE_LICENSE("GPL");
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2013-08-19 02:40:05 +02:00
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MODULE_ALIAS("platform:imx-parallel-display");
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