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author | Philipp Zabel <p.zabel@pengutronix.de> | 2014-11-24 16:33:34 +0100 |
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committer | Dave Airlie <airlied@redhat.com> | 2014-11-26 09:40:39 +1000 |
commit | 6556f7f82b9c401950d703072c0d8137b6f9f516 (patch) | |
tree | 7432c41c5e01cb975a5a8f8aaf5fbf88021af145 /drivers/gpu/drm/imx/parallel-display.c | |
parent | 0364d4fef4d19bdddca9a649ea83bc4bf458324f (diff) | |
download | linux-stable-6556f7f82b9c401950d703072c0d8137b6f9f516.tar.gz linux-stable-6556f7f82b9c401950d703072c0d8137b6f9f516.tar.bz2 linux-stable-6556f7f82b9c401950d703072c0d8137b6f9f516.zip |
drm: imx: Move imx-drm driver out of staging
The imx-drm driver was put into staging mostly for the following reasons,
all of which have been addressed or superseded:
- convert the irq driver to use linear irq domains
- work out the device tree bindings, this lead to the common of_graph
bindings being used
- factor out common helper functions, this mostly resulted in the
component framework and drm of_graph helpers.
Before adding new fixes, and certainly before adding new features,
move it into its proper place below drivers/gpu/drm.
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/imx/parallel-display.c')
-rw-r--r-- | drivers/gpu/drm/imx/parallel-display.c | 296 |
1 files changed, 296 insertions, 0 deletions
diff --git a/drivers/gpu/drm/imx/parallel-display.c b/drivers/gpu/drm/imx/parallel-display.c new file mode 100644 index 000000000000..015a454b87e1 --- /dev/null +++ b/drivers/gpu/drm/imx/parallel-display.c @@ -0,0 +1,296 @@ +/* + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, + * MA 02110-1301, USA. + */ + +#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) +{ +} + +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) +{ +} + +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", + .owner = THIS_MODULE, + }, +}; + +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"); |