mirror of https://gitee.com/openkylin/linux.git
158 lines
3.9 KiB
C
158 lines
3.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
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* Author: Rob Clark <rob@ti.com>
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*/
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_crtc.h>
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#include <drm/drm_probe_helper.h>
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#include "omap_drv.h"
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/*
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* connector funcs
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*/
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#define to_omap_connector(x) container_of(x, struct omap_connector, base)
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struct omap_connector {
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struct drm_connector base;
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struct omap_dss_device *output;
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};
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static enum drm_connector_status omap_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 omap_connector_destroy(struct drm_connector *connector)
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{
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struct omap_connector *omap_connector = to_omap_connector(connector);
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DBG("%s", connector->name);
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drm_connector_unregister(connector);
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drm_connector_cleanup(connector);
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omapdss_device_put(omap_connector->output);
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kfree(omap_connector);
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}
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static int omap_connector_get_modes(struct drm_connector *connector)
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{
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struct omap_connector *omap_connector = to_omap_connector(connector);
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struct omap_dss_device *dssdev = NULL;
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struct omap_dss_device *d;
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DBG("%s", connector->name);
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/*
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* If the display pipeline reports modes (e.g. with a fixed resolution
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* panel or an analog TV output), query it.
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*/
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for (d = omap_connector->output; d; d = d->next) {
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if (d->ops_flags & OMAP_DSS_DEVICE_OP_MODES)
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dssdev = d;
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}
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if (dssdev)
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return dssdev->ops->get_modes(dssdev, connector);
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/* We can't retrieve modes. The KMS core will add the default modes. */
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return 0;
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}
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enum drm_mode_status omap_connector_mode_fixup(struct omap_dss_device *dssdev,
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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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int ret;
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drm_mode_copy(adjusted_mode, mode);
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for (; dssdev; dssdev = dssdev->next) {
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if (!dssdev->ops || !dssdev->ops->check_timings)
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continue;
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ret = dssdev->ops->check_timings(dssdev, adjusted_mode);
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if (ret)
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return MODE_BAD;
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}
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return MODE_OK;
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}
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static enum drm_mode_status omap_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 omap_connector *omap_connector = to_omap_connector(connector);
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struct drm_display_mode new_mode = {};
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enum drm_mode_status status;
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status = omap_connector_mode_fixup(omap_connector->output, mode,
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&new_mode);
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if (status != MODE_OK)
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goto done;
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/* Check if vrefresh is still valid. */
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if (drm_mode_vrefresh(mode) != drm_mode_vrefresh(&new_mode))
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status = MODE_NOCLOCK;
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done:
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DBG("connector: mode %s: " DRM_MODE_FMT,
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(status == MODE_OK) ? "valid" : "invalid",
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DRM_MODE_ARG(mode));
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return status;
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}
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static const struct drm_connector_funcs omap_connector_funcs = {
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.reset = drm_atomic_helper_connector_reset,
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.detect = omap_connector_detect,
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.fill_modes = drm_helper_probe_single_connector_modes,
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.destroy = omap_connector_destroy,
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.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
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.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
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};
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static const struct drm_connector_helper_funcs omap_connector_helper_funcs = {
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.get_modes = omap_connector_get_modes,
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.mode_valid = omap_connector_mode_valid,
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};
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/* initialize connector */
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struct drm_connector *omap_connector_init(struct drm_device *dev,
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struct omap_dss_device *output,
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struct drm_encoder *encoder)
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{
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struct drm_connector *connector = NULL;
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struct omap_connector *omap_connector;
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DBG("%s", output->name);
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omap_connector = kzalloc(sizeof(*omap_connector), GFP_KERNEL);
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if (!omap_connector)
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goto fail;
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omap_connector->output = omapdss_device_get(output);
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connector = &omap_connector->base;
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connector->interlace_allowed = 1;
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connector->doublescan_allowed = 0;
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drm_connector_init(dev, connector, &omap_connector_funcs,
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DRM_MODE_CONNECTOR_DSI);
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drm_connector_helper_add(connector, &omap_connector_helper_funcs);
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return connector;
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fail:
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if (connector)
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omap_connector_destroy(connector);
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return NULL;
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}
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