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authorDaniel Vetter <daniel.vetter@ffwll.ch>2016-09-21 10:59:28 +0200
committerSean Paul <seanpaul@chromium.org>2016-09-22 00:04:02 -0700
commitf1e2f66ce2d9f732fec184ab885fba4b53c06016 (patch)
tree5881a515e6cd2e94a14d17ca36a40eeed0e9d023 /include/drm/drm_color_mgmt.h
parent1e4d84c6589e9e9d19884e705085fe4a1885b012 (diff)
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.h56
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