From: Ville Syrjälä ville.syrjala@linux.intel.com
Signed-off-by: Ville Syrjälä ville.syrjala@linux.intel.com --- drivers/gpu/drm/drm_crtc_helper.c | 48 ++++++++++++++++++++++++++++++++ include/drm/drm_crtc.h | 55 +++++++++++++++++++++++++++++++++++++ include/drm/drm_crtc_helper.h | 5 +++ 3 files changed, 108 insertions(+), 0 deletions(-)
diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c index 490b7bc..b06465c 100644 --- a/drivers/gpu/drm/drm_crtc_helper.c +++ b/drivers/gpu/drm/drm_crtc_helper.c @@ -1482,3 +1482,51 @@ int drm_calc_vscale(struct drm_region *src, struct drm_region *dst, return vscale; } EXPORT_SYMBOL(drm_calc_vscale); + +/** + * drm_chroma_phase_offsets - calculate the chroma phase offsets + * @ret_xoff: returned horizontal offset (16.16) + * @ret_yoff: returned vertical offset (16.16) + * @hsub: horizontal chroma subsampling factor + * @vsub: vertical chroma subsampling factor + * @chroma: chroma siting information (@drm_chroma_siting) + * @second_chroma_plane: first or second chroma plane? + * + * Calculates the phase offset between chroma and luma pixel centers, + * based on infromation provided in @chroma, @hsub, @vsub, and + * @second_chroma_plane. + * + * RETURNS: + * The chroma phase offsets in 16.16 format. The returned + * phase offsets are in chroma (ie. subsampled) coordinate space. + */ +void drm_chroma_phase_offsets(int *ret_xoff, int *ret_yoff, + int hsub, int vsub, + enum drm_chroma_siting chroma, + bool second_chroma_plane) +{ + *ret_xoff = 0; + *ret_yoff = 0; + + switch (chroma & 0x3) { + case DRM_CHROMA_SITING_HORZ_LEFT: + break; + case DRM_CHROMA_SITING_HORZ_CENTER: + *ret_xoff -= (hsub - 1) * 0x8000 / hsub; + break; + } + + switch (chroma & 0xc0) { + case DRM_CHROMA_SITING_VERT_TOP: + break; + case DRM_CHROMA_SITING_VERT_CENTER: + *ret_yoff -= (vsub - 1) * 0x8000 / vsub; + break; + } + + /* Chroma planes out of phase by 0.5 chroma lines? */ + if (second_chroma_plane && + (chroma & DRM_CHROMA_SITING_MISALIGNED_PLANES)) + *ret_yoff -= 0x8000; +} +EXPORT_SYMBOL(drm_chroma_phase_offsets); diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h index 736d68d..55ff998 100644 --- a/include/drm/drm_crtc.h +++ b/include/drm/drm_crtc.h @@ -903,4 +903,59 @@ extern int drm_mode_mmap_dumb_ioctl(struct drm_device *dev, extern int drm_mode_destroy_dumb_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv);
+/** + * drm_csc_range - indicates the valid range for color values + * @DRM_CSC_RANGE_UNKNOWN: not specified, implementation defined result + * @DRM_CSC_RANGE_MPEG: "MPEG" range (16-235 for Y, 16-240 for Cb/Cr) + * @DRM_CSC_RANGE_JPEG: "JPEG" or full range (0-255 for Y/Cb/Cr) + */ +enum drm_csc_range { + DRM_CSC_RANGE_UNKNOWN = 0x0, + + DRM_CSC_RANGE_MPEG = 0x1, + DRM_CSC_RANGE_JPEG = 0x2, +}; + +/** + * drm_csc_matrix - specifies the color space conversion matrix + * @DRM_CSC_MATRIX_UNKNOWN: not specified, implementation defined result + * @DRM_CSC_MATRIX_BT601: ITU-R BT.601 + * @DRM_CSC_MATRIX_BT709: ITU-R BT.709 + */ +enum drm_csc_matrix { + DRM_CSC_MATRIX_UNKNOWN = 0x0, + + DRM_CSC_MATRIX_BT601 = 0x1, + DRM_CSC_MATRIX_BT709 = 0x2, +}; + +/** + * drm_chroma_siting - chroma siting information + * @DRM_CHROMA_SITING_UNKNOWN: not specified, implementation defined result + * @DRM_CHROMA_SITING_HORZ_LEFT: horizontally co-sited with the left luma sample + * @DRM_CHROMA_SITING_HORZ_CENTER: horizontally interstitially sited with luma samples + * @DRM_CHROMA_SITING_VERT_TOP: vertically co-sited with the top luma sample + * @DRM_CHROMA_SITING_VERT_CENTER: vertically interstitially sited with luma samples + * @DRM_CHROMA_SITING_MISALIGNED_PLANES: chroma planes out of phase with each other by 0.5 lines + * @DRM_CHROMA_SITING_MPEG1: chroma siting convention used in MPEG1 + * @DRM_CHROMA_SITING_MPEG2: chroma siting convention used in MPEG2 + * @DRM_CHROMA_SITING_DV: chroma siting convention used in DV + */ +enum drm_chroma_siting { + DRM_CHROMA_SITING_UNKNOWN = 0x0, + + DRM_CHROMA_SITING_HORZ_LEFT = 0x1, + DRM_CHROMA_SITING_HORZ_CENTER = 0x2, + + DRM_CHROMA_SITING_VERT_TOP = 0x4, + DRM_CHROMA_SITING_VERT_CENTER = 0x8, + + DRM_CHROMA_SITING_MISALIGNED_PLANES = 0x10, + + /* typical configurations */ + DRM_CHROMA_SITING_MPEG1 = DRM_CHROMA_SITING_HORZ_CENTER | DRM_CHROMA_SITING_VERT_CENTER, + DRM_CHROMA_SITING_MPEG2 = DRM_CHROMA_SITING_HORZ_LEFT | DRM_CHROMA_SITING_VERT_CENTER, + DRM_CHROMA_SITING_DV = DRM_CHROMA_SITING_HORZ_LEFT | DRM_CHROMA_SITING_VERT_TOP | DRM_CHROMA_SITING_MISALIGNED_PLANES, +}; + #endif /* __DRM_CRTC_H__ */ diff --git a/include/drm/drm_crtc_helper.h b/include/drm/drm_crtc_helper.h index e23aa02..7541f96 100644 --- a/include/drm/drm_crtc_helper.h +++ b/include/drm/drm_crtc_helper.h @@ -182,4 +182,9 @@ extern int drm_calc_hscale(struct drm_region *src, struct drm_region *dst, extern int drm_calc_vscale(struct drm_region *src, struct drm_region *dst, int min_vscale, int max_vscale);
+extern void drm_chroma_phase_offsets(int *ret_xoff, int *ret_yoff, + int hsub, int vsub, + enum drm_chroma_siting chroma, + bool second_chroma_plane); + #endif