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-rw-r--r--Documentation/media/uapi/v4l/pixfmt-007.rst30
-rw-r--r--drivers/media/common/v4l2-tpg/v4l2-tpg-core.c14
2 files changed, 21 insertions, 23 deletions
diff --git a/Documentation/media/uapi/v4l/pixfmt-007.rst b/Documentation/media/uapi/v4l/pixfmt-007.rst
index c45d8794e8eb..662302cfba8b 100644
--- a/Documentation/media/uapi/v4l/pixfmt-007.rst
+++ b/Documentation/media/uapi/v4l/pixfmt-007.rst
@@ -97,11 +97,11 @@ the following ``V4L2_YCBCR_ENC_601`` encoding:
97 97
98.. math:: 98.. math::
99 99
100 Y' = 0.299R' + 0.587G' + 0.114B' 100 Y' = 0.2990R' + 0.5870G' + 0.1140B'
101 101
102 Cb = -0.169R' - 0.331G' + 0.5B' 102 Cb = -0.1687R' - 0.3313G' + 0.5B'
103 103
104 Cr = 0.5R' - 0.419G' - 0.081B' 104 Cr = 0.5R' - 0.4187G' - 0.0813B'
105 105
106Y' is clamped to the range [0…1] and Cb and Cr are clamped to the range 106Y' is clamped to the range [0…1] and Cb and Cr are clamped to the range
107[-0.5…0.5]. This conversion to Y'CbCr is identical to the one defined in 107[-0.5…0.5]. This conversion to Y'CbCr is identical to the one defined in
@@ -241,11 +241,11 @@ scaled and offset:
241 241
242.. math:: 242.. math::
243 243
244 Y' = \frac{219}{256} * (0.299R' + 0.587G' + 0.114B') + \frac{16}{256} 244 Y' = \frac{219}{256} * (0.2990R' + 0.5870G' + 0.1140B') + \frac{16}{256}
245 245
246 Cb = \frac{224}{256} * (-0.169R' - 0.331G' + 0.5B') 246 Cb = \frac{224}{256} * (-0.1687R' - 0.3313G' + 0.5B')
247 247
248 Cr = \frac{224}{256} * (0.5R' - 0.419G' - 0.081B') 248 Cr = \frac{224}{256} * (0.5R' - 0.4187G' - 0.0813B')
249 249
250Y' is clamped to the range [0…1] and Cb and Cr are clamped to the range 250Y' is clamped to the range [0…1] and Cb and Cr are clamped to the range
251[-0.5…0.5]. The non-standard xvYCC 709 or xvYCC 601 encodings can be 251[-0.5…0.5]. The non-standard xvYCC 709 or xvYCC 601 encodings can be
@@ -440,11 +440,11 @@ the following ``V4L2_YCBCR_ENC_601`` encoding:
440 440
441.. math:: 441.. math::
442 442
443 Y' = 0.299R' + 0.587G' + 0.114B' 443 Y' = 0.2990R' + 0.5870G' + 0.1140B'
444 444
445 Cb = -0.169R' - 0.331G' + 0.5B' 445 Cb = -0.1687R' - 0.3313G' + 0.5B'
446 446
447 Cr = 0.5R' - 0.419G' - 0.081B' 447 Cr = 0.5R' - 0.4187G' - 0.0813B'
448 448
449Y' is clamped to the range [0…1] and Cb and Cr are clamped to the range 449Y' is clamped to the range [0…1] and Cb and Cr are clamped to the range
450[-0.5…0.5]. This transform is identical to one defined in SMPTE 450[-0.5…0.5]. This transform is identical to one defined in SMPTE
@@ -842,11 +842,11 @@ the following ``V4L2_YCBCR_ENC_601`` encoding:
842 842
843.. math:: 843.. math::
844 844
845 Y' = 0.299R' + 0.587G' + 0.114B' 845 Y' = 0.2990R' + 0.5870G' + 0.1140B'
846 846
847 Cb = -0.169R' - 0.331G' + 0.5B' 847 Cb = -0.1687R' - 0.3313G' + 0.5B'
848 848
849 Cr = 0.5R' - 0.419G' - 0.081B' 849 Cr = 0.5R' - 0.4187G' - 0.0813B'
850 850
851Y' is clamped to the range [0…1] and Cb and Cr are clamped to the range 851Y' is clamped to the range [0…1] and Cb and Cr are clamped to the range
852[-0.5…0.5]. The Y'CbCr quantization is limited range. This transform is 852[-0.5…0.5]. The Y'CbCr quantization is limited range. This transform is
@@ -940,11 +940,11 @@ the following ``V4L2_YCBCR_ENC_601`` encoding:
940 940
941.. math:: 941.. math::
942 942
943 Y' = 0.299R' + 0.587G' + 0.114B' 943 Y' = 0.2990R' + 0.5870G' + 0.1140B'
944 944
945 Cb = -0.169R' - 0.331G' + 0.5B' 945 Cb = -0.1687R' - 0.3313G' + 0.5B'
946 946
947 Cr = 0.5R' - 0.419G' - 0.081B' 947 Cr = 0.5R' - 0.4187G' - 0.0813B'
948 948
949Y' is clamped to the range [0…1] and Cb and Cr are clamped to the range 949Y' is clamped to the range [0…1] and Cb and Cr are clamped to the range
950[-0.5…0.5]. The Y'CbCr quantization is limited range. This transform is 950[-0.5…0.5]. The Y'CbCr quantization is limited range. This transform is
diff --git a/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c b/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
index 3ec3cebe62b9..1684810cab83 100644
--- a/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
+++ b/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
@@ -504,14 +504,14 @@ static void color_to_ycbcr(struct tpg_data *tpg, int r, int g, int b,
504#define COEFF(v, r) ((int)(0.5 + (v) * (r) * 256.0)) 504#define COEFF(v, r) ((int)(0.5 + (v) * (r) * 256.0))
505 505
506 static const int bt601[3][3] = { 506 static const int bt601[3][3] = {
507 { COEFF(0.299, 219), COEFF(0.587, 219), COEFF(0.114, 219) }, 507 { COEFF(0.299, 219), COEFF(0.587, 219), COEFF(0.114, 219) },
508 { COEFF(-0.169, 224), COEFF(-0.331, 224), COEFF(0.5, 224) }, 508 { COEFF(-0.1687, 224), COEFF(-0.3313, 224), COEFF(0.5, 224) },
509 { COEFF(0.5, 224), COEFF(-0.419, 224), COEFF(-0.081, 224) }, 509 { COEFF(0.5, 224), COEFF(-0.4187, 224), COEFF(-0.0813, 224) },
510 }; 510 };
511 static const int bt601_full[3][3] = { 511 static const int bt601_full[3][3] = {
512 { COEFF(0.299, 255), COEFF(0.587, 255), COEFF(0.114, 255) }, 512 { COEFF(0.299, 255), COEFF(0.587, 255), COEFF(0.114, 255) },
513 { COEFF(-0.169, 255), COEFF(-0.331, 255), COEFF(0.5, 255) }, 513 { COEFF(-0.1687, 255), COEFF(-0.3313, 255), COEFF(0.5, 255) },
514 { COEFF(0.5, 255), COEFF(-0.419, 255), COEFF(-0.081, 255) }, 514 { COEFF(0.5, 255), COEFF(-0.4187, 255), COEFF(-0.0813, 255) },
515 }; 515 };
516 static const int rec709[3][3] = { 516 static const int rec709[3][3] = {
517 { COEFF(0.2126, 219), COEFF(0.7152, 219), COEFF(0.0722, 219) }, 517 { COEFF(0.2126, 219), COEFF(0.7152, 219), COEFF(0.0722, 219) },
@@ -558,7 +558,6 @@ static void color_to_ycbcr(struct tpg_data *tpg, int r, int g, int b,
558 558
559 switch (tpg->real_ycbcr_enc) { 559 switch (tpg->real_ycbcr_enc) {
560 case V4L2_YCBCR_ENC_601: 560 case V4L2_YCBCR_ENC_601:
561 case V4L2_YCBCR_ENC_SYCC:
562 rgb2ycbcr(full ? bt601_full : bt601, r, g, b, y_offset, y, cb, cr); 561 rgb2ycbcr(full ? bt601_full : bt601, r, g, b, y_offset, y, cb, cr);
563 break; 562 break;
564 case V4L2_YCBCR_ENC_XV601: 563 case V4L2_YCBCR_ENC_XV601:
@@ -674,7 +673,6 @@ static void ycbcr_to_color(struct tpg_data *tpg, int y, int cb, int cr,
674 673
675 switch (tpg->real_ycbcr_enc) { 674 switch (tpg->real_ycbcr_enc) {
676 case V4L2_YCBCR_ENC_601: 675 case V4L2_YCBCR_ENC_601:
677 case V4L2_YCBCR_ENC_SYCC:
678 ycbcr2rgb(full ? bt601_full : bt601, y, cb, cr, y_offset, r, g, b); 676 ycbcr2rgb(full ? bt601_full : bt601, y, cb, cr, y_offset, r, g, b);
679 break; 677 break;
680 case V4L2_YCBCR_ENC_XV601: 678 case V4L2_YCBCR_ENC_XV601:
generated by cgit v1.2.2 (git 2.25.0) at 2026-07-18 23:59:30 -0400