mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-16 07:35:14 +00:00
a6acccf8ef
Again move it from the unmaintainable csv into DOC free-form overview sections. v2: Types Lionel&Sean spotted. Cc: Lionel Landwerlin <lionel.g.landwerlin@intel.com> Reviewed-by: Sean Paul <seanpaul@chromium.org> Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Signed-off-by: Sean Paul <seanpaul@chromium.org> Link: http://patchwork.freedesktop.org/patch/msgid/1474448370-32227-6-git-send-email-daniel.vetter@ffwll.ch
61 lines
2.1 KiB
C
61 lines
2.1 KiB
C
/*
|
|
* Copyright (c) 2016 Intel Corporation
|
|
*
|
|
* Permission to use, copy, modify, distribute, and sell this software and its
|
|
* documentation for any purpose is hereby granted without fee, provided that
|
|
* the above copyright notice appear in all copies and that both that copyright
|
|
* notice and this permission notice appear in supporting documentation, and
|
|
* that the name of the copyright holders not be used in advertising or
|
|
* publicity pertaining to distribution of the software without specific,
|
|
* written prior permission. The copyright holders make no representations
|
|
* about the suitability of this software for any purpose. It is provided "as
|
|
* is" without express or implied warranty.
|
|
*
|
|
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
|
|
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
|
|
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
|
|
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
|
|
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
|
|
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
|
|
* OF THIS SOFTWARE.
|
|
*/
|
|
|
|
#ifndef __DRM_COLOR_MGMT_H__
|
|
#define __DRM_COLOR_MGMT_H__
|
|
|
|
#include <linux/ctype.h>
|
|
|
|
void drm_crtc_enable_color_mgmt(struct drm_crtc *crtc,
|
|
uint degamma_lut_size,
|
|
bool has_ctm,
|
|
uint gamma_lut_size);
|
|
|
|
int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc,
|
|
int gamma_size);
|
|
|
|
/**
|
|
* drm_color_lut_extract - clamp&round LUT entries
|
|
* @user_input: input value
|
|
* @bit_precision: number of bits the hw LUT supports
|
|
*
|
|
* Extract a degamma/gamma LUT value provided by user (in the form of
|
|
* &drm_color_lut entries) and round it to the precision supported by the
|
|
* hardware.
|
|
*/
|
|
static inline uint32_t drm_color_lut_extract(uint32_t user_input,
|
|
uint32_t bit_precision)
|
|
{
|
|
uint32_t val = user_input;
|
|
uint32_t max = 0xffff >> (16 - bit_precision);
|
|
|
|
/* Round only if we're not using full precision. */
|
|
if (bit_precision < 16) {
|
|
val += 1UL << (16 - bit_precision - 1);
|
|
val >>= 16 - bit_precision;
|
|
}
|
|
|
|
return clamp_val(val, 0, max);
|
|
}
|
|
|
|
|
|
#endif
|