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-rw-r--r--include/drm/drm_crtc_helper.h124
1 files changed, 124 insertions, 0 deletions
diff --git a/include/drm/drm_crtc_helper.h b/include/drm/drm_crtc_helper.h
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+++ b/include/drm/drm_crtc_helper.h
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+/*
+ * Copyright © 2006 Keith Packard
+ * Copyright © 2007-2008 Dave Airlie
+ * Copyright © 2007-2008 Intel Corporation
+ * Jesse Barnes <jesse.barnes@intel.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/*
+ * The DRM mode setting helper functions are common code for drivers to use if
+ * they wish. Drivers are not forced to use this code in their
+ * implementations but it would be useful if they code they do use at least
+ * provides a consistent interface and operation to userspace
+ */
+
+#ifndef __DRM_CRTC_HELPER_H__
+#define __DRM_CRTC_HELPER_H__
+
+#include <linux/i2c.h>
+#include <linux/spinlock.h>
+#include <linux/types.h>
+#include <linux/idr.h>
+
+#include <linux/fb.h>
+
+struct drm_crtc_helper_funcs {
+ /*
+ * Control power levels on the CRTC. If the mode passed in is
+ * unsupported, the provider must use the next lowest power level.
+ */
+ void (*dpms)(struct drm_crtc *crtc, int mode);
+ void (*prepare)(struct drm_crtc *crtc);
+ void (*commit)(struct drm_crtc *crtc);
+
+ /* Provider can fixup or change mode timings before modeset occurs */
+ bool (*mode_fixup)(struct drm_crtc *crtc,
+ struct drm_display_mode *mode,
+ struct drm_display_mode *adjusted_mode);
+ /* Actually set the mode */
+ void (*mode_set)(struct drm_crtc *crtc, struct drm_display_mode *mode,
+ struct drm_display_mode *adjusted_mode, int x, int y,
+ struct drm_framebuffer *old_fb);
+
+ /* Move the crtc on the current fb to the given position *optional* */
+ void (*mode_set_base)(struct drm_crtc *crtc, int x, int y,
+ struct drm_framebuffer *old_fb);
+};
+
+struct drm_encoder_helper_funcs {
+ void (*dpms)(struct drm_encoder *encoder, int mode);
+ void (*save)(struct drm_encoder *encoder);
+ void (*restore)(struct drm_encoder *encoder);
+
+ bool (*mode_fixup)(struct drm_encoder *encoder,
+ struct drm_display_mode *mode,
+ struct drm_display_mode *adjusted_mode);
+ void (*prepare)(struct drm_encoder *encoder);
+ void (*commit)(struct drm_encoder *encoder);
+ void (*mode_set)(struct drm_encoder *encoder,
+ struct drm_display_mode *mode,
+ struct drm_display_mode *adjusted_mode);
+ /* detect for DAC style encoders */
+ enum drm_connector_status (*detect)(struct drm_encoder *encoder,
+ struct drm_connector *connector);
+};
+
+struct drm_connector_helper_funcs {
+ int (*get_modes)(struct drm_connector *connector);
+ int (*mode_valid)(struct drm_connector *connector,
+ struct drm_display_mode *mode);
+ struct drm_encoder *(*best_encoder)(struct drm_connector *connector);
+};
+
+extern void drm_helper_probe_single_connector_modes(struct drm_connector *connector, uint32_t maxX, uint32_t maxY);
+extern void drm_helper_disable_unused_functions(struct drm_device *dev);
+extern int drm_helper_hotplug_stage_two(struct drm_device *dev);
+extern bool drm_helper_initial_config(struct drm_device *dev, bool can_grow);
+extern int drm_crtc_helper_set_config(struct drm_mode_set *set);
+extern bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
+ struct drm_display_mode *mode,
+ int x, int y,
+ struct drm_framebuffer *old_fb);
+extern bool drm_helper_crtc_in_use(struct drm_crtc *crtc);
+
+extern int drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb,
+ struct drm_mode_fb_cmd *mode_cmd);
+
+static inline void drm_crtc_helper_add(struct drm_crtc *crtc,
+ const struct drm_crtc_helper_funcs *funcs)
+{
+ crtc->helper_private = (void *)funcs;
+}
+
+static inline void drm_encoder_helper_add(struct drm_encoder *encoder,
+ const struct drm_encoder_helper_funcs *funcs)
+{
+ encoder->helper_private = (void *)funcs;
+}
+
+static inline void drm_connector_helper_add(struct drm_connector *connector,
+ const struct drm_connector_helper_funcs *funcs)
+{
+ connector->helper_private = (void *)funcs;
+}
+
+extern int drm_helper_resume_force_mode(struct drm_device *dev);
+#endif
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