mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-26 05:34:13 +08:00
5488dc16fd
Patch based on a previous series by Shashank Sharma.
This introduces optional properties to enable color correction at the
pipe level. It relies on 3 transformations applied to every pixels
displayed. First a lookup into a degamma table, then a multiplication
of the rgb components by a 3x3 matrix and finally another lookup into
a gamma table.
The following properties can be added to a pipe :
- DEGAMMA_LUT : blob containing degamma LUT
- DEGAMMA_LUT_SIZE : number of elements in DEGAMMA_LUT
- CTM : transformation matrix applied after the degamma LUT
- GAMMA_LUT : blob containing gamma LUT
- GAMMA_LUT_SIZE : number of elements in GAMMA_LUT
DEGAMMA_LUT_SIZE and GAMMA_LUT_SIZE are read only properties, set by
the driver to tell userspace applications what sizes should be the
lookup tables in DEGAMMA_LUT and GAMMA_LUT.
A helper is also provided so legacy gamma correction is redirected
through these new properties.
v2: Register LUT size properties as range
v3: Fix round in drm_color_lut_get_value() helper
More docs on how degamma/gamma properties are used
v4: Update contributors
v5: Rename CTM_MATRIX property to CTM (Doh!)
Add legacy gamma_set atomic helper
Describe CTM/LUT acronyms in the kernel doc
v6: Fix missing blob unref in drm_atomic_helper_crtc_reset
Signed-off-by: Shashank Sharma <shashank.sharma@intel.com>
Signed-off-by: Kumar, Kiran S <kiran.s.kumar@intel.com>
Signed-off-by: Kausal Malladi <kausalmalladi@gmail.com>
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Acked-by: Rob Bradford <robert.bradford@intel.com>
[danvet: CrOS maintainers are also happy with the userspacde side:
https://codereview.chromium.org/1182063002/ ]
Reviewed-by: Daniel Stone <daniels@collabora.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1456506302-640-4-git-send-email-lionel.g.landwerlin@intel.com
86 lines
3.5 KiB
C
86 lines
3.5 KiB
C
/*
|
|
* 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/spinlock.h>
|
|
#include <linux/types.h>
|
|
#include <linux/idr.h>
|
|
|
|
#include <linux/fb.h>
|
|
|
|
#include <drm/drm_crtc.h>
|
|
#include <drm/drm_modeset_helper_vtables.h>
|
|
|
|
extern void drm_helper_disable_unused_functions(struct drm_device *dev);
|
|
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 void drm_helper_crtc_enable_color_mgmt(struct drm_crtc *crtc,
|
|
int degamma_lut_size,
|
|
int gamma_lut_size);
|
|
extern bool drm_helper_crtc_in_use(struct drm_crtc *crtc);
|
|
extern bool drm_helper_encoder_in_use(struct drm_encoder *encoder);
|
|
|
|
extern int drm_helper_connector_dpms(struct drm_connector *connector, int mode);
|
|
|
|
extern void drm_helper_move_panel_connectors_to_head(struct drm_device *);
|
|
|
|
extern void drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb,
|
|
const struct drm_mode_fb_cmd2 *mode_cmd);
|
|
|
|
extern void drm_helper_resume_force_mode(struct drm_device *dev);
|
|
|
|
int drm_helper_crtc_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);
|
|
int drm_helper_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
|
|
struct drm_framebuffer *old_fb);
|
|
|
|
/* drm_probe_helper.c */
|
|
extern int drm_helper_probe_single_connector_modes(struct drm_connector
|
|
*connector, uint32_t maxX,
|
|
uint32_t maxY);
|
|
extern void drm_kms_helper_poll_init(struct drm_device *dev);
|
|
extern void drm_kms_helper_poll_fini(struct drm_device *dev);
|
|
extern bool drm_helper_hpd_irq_event(struct drm_device *dev);
|
|
extern void drm_kms_helper_hotplug_event(struct drm_device *dev);
|
|
|
|
extern void drm_kms_helper_poll_disable(struct drm_device *dev);
|
|
extern void drm_kms_helper_poll_enable(struct drm_device *dev);
|
|
extern void drm_kms_helper_poll_enable_locked(struct drm_device *dev);
|
|
|
|
#endif
|