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author | Jakub Kicinski <kuba@kernel.org> | 2024-03-22 02:14:13 +0300 |
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committer | Jakub Kicinski <kuba@kernel.org> | 2024-03-22 02:15:08 +0300 |
commit | 537c2e91d3549e5d6020bb0576cf9b54a845255f (patch) | |
tree | c09e8a1b7d733cde19b0c72678c28fb2bc97ff6b /drivers/gpu/drm/amd/display/dc/basics/conversion.c | |
parent | 237bb5f7f7f55ec5f773469a974c61a49c298625 (diff) | |
parent | cba9ffdb9913dfe6be29f049ce920ce451ce7cc4 (diff) | |
download | linux-537c2e91d3549e5d6020bb0576cf9b54a845255f.tar.xz |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Cross-merge networking fixes after downstream PR.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/basics/conversion.c')
-rw-r--r-- | drivers/gpu/drm/amd/display/dc/basics/conversion.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/basics/conversion.c b/drivers/gpu/drm/amd/display/dc/basics/conversion.c index 1090d235086a..bd1f60ecaba4 100644 --- a/drivers/gpu/drm/amd/display/dc/basics/conversion.c +++ b/drivers/gpu/drm/amd/display/dc/basics/conversion.c @@ -101,6 +101,40 @@ void convert_float_matrix( } } +static struct fixed31_32 int_frac_to_fixed_point(uint16_t arg, + uint8_t integer_bits, + uint8_t fractional_bits) +{ + struct fixed31_32 result; + uint16_t sign_mask = 1 << (fractional_bits + integer_bits); + uint16_t value_mask = sign_mask - 1; + + result.value = (long long)(arg & value_mask) << + (FIXED31_32_BITS_PER_FRACTIONAL_PART - fractional_bits); + + if (arg & sign_mask) + result = dc_fixpt_neg(result); + + return result; +} + +/** + * convert_hw_matrix - converts HW values into fixed31_32 matrix. + * @matrix: fixed point 31.32 matrix + * @reg: array of register values + * @buffer_size: size of the array of register values + * + * Converts HW register spec defined format S2D13 into a fixed-point 31.32 + * matrix. + */ +void convert_hw_matrix(struct fixed31_32 *matrix, + uint16_t *reg, + uint32_t buffer_size) +{ + for (int i = 0; i < buffer_size; ++i) + matrix[i] = int_frac_to_fixed_point(reg[i], 2, 13); +} + static uint32_t find_gcd(uint32_t a, uint32_t b) { uint32_t remainder; |