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author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2016-09-21 10:59:28 +0200 |
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committer | Sean Paul <seanpaul@chromium.org> | 2016-09-22 00:04:02 -0700 |
commit | f1e2f66ce2d9f732fec184ab885fba4b53c06016 (patch) | |
tree | 5881a515e6cd2e94a14d17ca36a40eeed0e9d023 /include/drm/drm_color_mgmt.h | |
parent | 1e4d84c6589e9e9d19884e705085fe4a1885b012 (diff) | |
download | linux-stable-f1e2f66ce2d9f732fec184ab885fba4b53c06016.tar.gz linux-stable-f1e2f66ce2d9f732fec184ab885fba4b53c06016.tar.bz2 linux-stable-f1e2f66ce2d9f732fec184ab885fba4b53c06016.zip |
drm: Extract drm_color_mgmt.[hc]
For both the new degamm/lut/gamma atomic combo, and the old legacy
gamma tables.
Acked-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Cc: 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/1474448370-32227-5-git-send-email-daniel.vetter@ffwll.ch
Diffstat (limited to 'include/drm/drm_color_mgmt.h')
-rw-r--r-- | include/drm/drm_color_mgmt.h | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/include/drm/drm_color_mgmt.h b/include/drm/drm_color_mgmt.h new file mode 100644 index 000000000000..1e01c58bbe81 --- /dev/null +++ b/include/drm/drm_color_mgmt.h @@ -0,0 +1,56 @@ +/* + * 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); + +/* + * Extract a degamma/gamma LUT value provided by user 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 |