diff options
| author | james qian wang (Arm Technology China) <james.qian.wang@arm.com> | 2019-11-12 14:09:59 +0300 |
|---|---|---|
| committer | james qian wang (Arm Technology China) <james.qian.wang@arm.com> | 2019-11-14 05:29:18 +0300 |
| commit | 7ca7fcef13f494acd6d9c880ee7fb8134ed7d116 (patch) | |
| tree | a78acfb5008cc2651a49746baee416350d6f00df /include/drm/drm_color_mgmt.h | |
| parent | 4773483568f75e650c05dc6d5086f382b9538081 (diff) | |
| download | linux-7ca7fcef13f494acd6d9c880ee7fb8134ed7d116.tar.xz | |
drm: Add a new helper drm_color_ctm_s31_32_to_qm_n()
Add a new helper function drm_color_ctm_s31_32_to_qm_n() for driver to
convert S31.32 sign-magnitude to Qm.n 2's complement that supported by
hardware.
V4: Address Mihai, Daniel and Ilia's review comments.
V5: Includes the sign bit in the value of m (Qm.n).
V6: Allows m = 0 according to Mihail's comments.
V7: Address Mihail's comments.
V8: Use type 'u32' to replace 'uint32_t'
V9: Rebase.
Signed-off-by: james qian wang (Arm Technology China) <james.qian.wang@arm.com>
Reviewed-by: Mihail Atanassov <mihail.atanassov@arm.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20191112110927.20931-2-james.qian.wang@arm.com
Diffstat (limited to 'include/drm/drm_color_mgmt.h')
| -rw-r--r-- | include/drm/drm_color_mgmt.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/drm/drm_color_mgmt.h b/include/drm/drm_color_mgmt.h index d1c662d92ab7..997a42ab29f5 100644 --- a/include/drm/drm_color_mgmt.h +++ b/include/drm/drm_color_mgmt.h @@ -30,6 +30,7 @@ struct drm_crtc; struct drm_plane; uint32_t drm_color_lut_extract(uint32_t user_input, uint32_t bit_precision); +u64 drm_color_ctm_s31_32_to_qm_n(u64 user_input, u32 m, u32 n); void drm_crtc_enable_color_mgmt(struct drm_crtc *crtc, uint degamma_lut_size, |