2011-10-04 10:19:01 +00:00
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/*
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* Copyright (c) 2011 Samsung Electronics Co., Ltd.
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* Authors:
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* Inki Dae <inki.dae@samsung.com>
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* Joonyoung Shim <jy0922.shim@samsung.com>
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* Seung-Woo Kim <sw0312.kim@samsung.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "drmP.h"
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#include "drm_crtc_helper.h"
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#include "exynos_drm_drv.h"
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#include "exynos_drm_encoder.h"
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#define MAX_EDID 256
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#define to_exynos_connector(x) container_of(x, struct exynos_drm_connector,\
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drm_connector)
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struct exynos_drm_connector {
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struct drm_connector drm_connector;
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};
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/* convert exynos_video_timings to drm_display_mode */
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static inline void
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convert_to_display_mode(struct drm_display_mode *mode,
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struct fb_videomode *timing)
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{
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DRM_DEBUG_KMS("%s\n", __FILE__);
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mode->clock = timing->pixclock / 1000;
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mode->hdisplay = timing->xres;
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mode->hsync_start = mode->hdisplay + timing->left_margin;
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mode->hsync_end = mode->hsync_start + timing->hsync_len;
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mode->htotal = mode->hsync_end + timing->right_margin;
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mode->vdisplay = timing->yres;
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mode->vsync_start = mode->vdisplay + timing->upper_margin;
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mode->vsync_end = mode->vsync_start + timing->vsync_len;
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mode->vtotal = mode->vsync_end + timing->lower_margin;
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}
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/* convert drm_display_mode to exynos_video_timings */
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static inline void
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convert_to_video_timing(struct fb_videomode *timing,
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struct drm_display_mode *mode)
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{
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DRM_DEBUG_KMS("%s\n", __FILE__);
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memset(timing, 0, sizeof(*timing));
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timing->pixclock = mode->clock * 1000;
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timing->refresh = mode->vrefresh;
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timing->xres = mode->hdisplay;
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timing->left_margin = mode->hsync_start - mode->hdisplay;
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timing->hsync_len = mode->hsync_end - mode->hsync_start;
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timing->right_margin = mode->htotal - mode->hsync_end;
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timing->yres = mode->vdisplay;
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timing->upper_margin = mode->vsync_start - mode->vdisplay;
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timing->vsync_len = mode->vsync_end - mode->vsync_start;
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timing->lower_margin = mode->vtotal - mode->vsync_end;
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if (mode->flags & DRM_MODE_FLAG_INTERLACE)
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timing->vmode = FB_VMODE_INTERLACED;
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else
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timing->vmode = FB_VMODE_NONINTERLACED;
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if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
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timing->vmode |= FB_VMODE_DOUBLE;
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}
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static int exynos_drm_connector_get_modes(struct drm_connector *connector)
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{
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struct exynos_drm_manager *manager =
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exynos_drm_get_manager(connector->encoder);
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struct exynos_drm_display *display = manager->display;
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unsigned int count;
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DRM_DEBUG_KMS("%s\n", __FILE__);
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if (!display) {
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DRM_DEBUG_KMS("display is null.\n");
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return 0;
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}
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/*
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* if get_edid() exists then get_edid() callback of hdmi side
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* is called to get edid data through i2c interface else
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* get timing from the FIMD driver(display controller).
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*
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* P.S. in case of lcd panel, count is always 1 if success
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* because lcd panel has only one mode.
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*/
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if (display->get_edid) {
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int ret;
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void *edid;
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edid = kzalloc(MAX_EDID, GFP_KERNEL);
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if (!edid) {
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DRM_ERROR("failed to allocate edid\n");
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return 0;
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}
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ret = display->get_edid(manager->dev, connector,
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edid, MAX_EDID);
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if (ret < 0) {
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DRM_ERROR("failed to get edid data.\n");
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kfree(edid);
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edid = NULL;
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return 0;
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}
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drm_mode_connector_update_edid_property(connector, edid);
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count = drm_add_edid_modes(connector, edid);
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kfree(connector->display_info.raw_edid);
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connector->display_info.raw_edid = edid;
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} else {
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struct drm_display_mode *mode = drm_mode_create(connector->dev);
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struct fb_videomode *timing;
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if (display->get_timing)
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timing = display->get_timing(manager->dev);
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else {
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drm_mode_destroy(connector->dev, mode);
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return 0;
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}
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convert_to_display_mode(mode, timing);
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mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
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drm_mode_set_name(mode);
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drm_mode_probed_add(connector, mode);
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count = 1;
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}
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return count;
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}
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static int exynos_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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struct exynos_drm_manager *manager =
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exynos_drm_get_manager(connector->encoder);
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struct exynos_drm_display *display = manager->display;
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struct fb_videomode timing;
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int ret = MODE_BAD;
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DRM_DEBUG_KMS("%s\n", __FILE__);
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convert_to_video_timing(&timing, mode);
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if (display && display->check_timing)
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if (!display->check_timing(manager->dev, (void *)&timing))
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ret = MODE_OK;
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return ret;
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}
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struct drm_encoder *exynos_drm_best_encoder(struct drm_connector *connector)
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{
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DRM_DEBUG_KMS("%s\n", __FILE__);
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return connector->encoder;
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}
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static struct drm_connector_helper_funcs exynos_connector_helper_funcs = {
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.get_modes = exynos_drm_connector_get_modes,
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.mode_valid = exynos_drm_connector_mode_valid,
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.best_encoder = exynos_drm_best_encoder,
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};
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/* get detection status of display device. */
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static enum drm_connector_status
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exynos_drm_connector_detect(struct drm_connector *connector, bool force)
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{
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struct exynos_drm_manager *manager =
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exynos_drm_get_manager(connector->encoder);
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struct exynos_drm_display *display = manager->display;
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enum drm_connector_status status = connector_status_disconnected;
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DRM_DEBUG_KMS("%s\n", __FILE__);
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if (display && display->is_connected) {
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if (display->is_connected(manager->dev))
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status = connector_status_connected;
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else
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status = connector_status_disconnected;
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}
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return status;
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}
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static void exynos_drm_connector_destroy(struct drm_connector *connector)
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{
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struct exynos_drm_connector *exynos_connector =
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to_exynos_connector(connector);
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DRM_DEBUG_KMS("%s\n", __FILE__);
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drm_sysfs_connector_remove(connector);
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drm_connector_cleanup(connector);
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kfree(exynos_connector);
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}
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static struct drm_connector_funcs exynos_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 = exynos_drm_connector_detect,
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.destroy = exynos_drm_connector_destroy,
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};
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struct drm_connector *exynos_drm_connector_create(struct drm_device *dev,
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struct drm_encoder *encoder)
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{
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struct exynos_drm_connector *exynos_connector;
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struct exynos_drm_manager *manager = exynos_drm_get_manager(encoder);
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struct drm_connector *connector;
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int type;
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int err;
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DRM_DEBUG_KMS("%s\n", __FILE__);
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exynos_connector = kzalloc(sizeof(*exynos_connector), GFP_KERNEL);
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if (!exynos_connector) {
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DRM_ERROR("failed to allocate connector\n");
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return NULL;
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}
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connector = &exynos_connector->drm_connector;
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switch (manager->display->type) {
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case EXYNOS_DISPLAY_TYPE_HDMI:
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type = DRM_MODE_CONNECTOR_HDMIA;
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2011-10-19 06:10:10 +00:00
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connector->interlace_allowed = true;
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connector->polled = DRM_CONNECTOR_POLL_HPD;
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2011-10-04 10:19:01 +00:00
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break;
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default:
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type = DRM_MODE_CONNECTOR_Unknown;
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break;
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}
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drm_connector_init(dev, connector, &exynos_connector_funcs, type);
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drm_connector_helper_add(connector, &exynos_connector_helper_funcs);
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err = drm_sysfs_connector_add(connector);
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if (err)
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goto err_connector;
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connector->encoder = encoder;
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err = drm_mode_connector_attach_encoder(connector, encoder);
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if (err) {
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DRM_ERROR("failed to attach a connector to a encoder\n");
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goto err_sysfs;
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}
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DRM_DEBUG_KMS("connector has been created\n");
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return connector;
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err_sysfs:
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drm_sysfs_connector_remove(connector);
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err_connector:
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drm_connector_cleanup(connector);
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kfree(exynos_connector);
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return NULL;
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}
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MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
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MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
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MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
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MODULE_DESCRIPTION("Samsung SoC DRM Connector Driver");
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MODULE_LICENSE("GPL");
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