diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/basics')
-rw-r--r-- | drivers/gpu/drm/amd/display/dc/basics/conversion.c | 34 | ||||
-rw-r--r-- | drivers/gpu/drm/amd/display/dc/basics/conversion.h | 4 | ||||
-rw-r--r-- | drivers/gpu/drm/amd/display/dc/basics/dce_calcs.c | 2 |
3 files changed, 38 insertions, 2 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; diff --git a/drivers/gpu/drm/amd/display/dc/basics/conversion.h b/drivers/gpu/drm/amd/display/dc/basics/conversion.h index 81da4e6f7a1a..a433cef78496 100644 --- a/drivers/gpu/drm/amd/display/dc/basics/conversion.h +++ b/drivers/gpu/drm/amd/display/dc/basics/conversion.h @@ -41,6 +41,10 @@ void convert_float_matrix( void reduce_fraction(uint32_t num, uint32_t den, uint32_t *out_num, uint32_t *out_den); +void convert_hw_matrix(struct fixed31_32 *matrix, + uint16_t *reg, + uint32_t buffer_size); + static inline unsigned int log_2(unsigned int num) { return ilog2(num); diff --git a/drivers/gpu/drm/amd/display/dc/basics/dce_calcs.c b/drivers/gpu/drm/amd/display/dc/basics/dce_calcs.c index 39530b2ea495..b30c2cdc1a61 100644 --- a/drivers/gpu/drm/amd/display/dc/basics/dce_calcs.c +++ b/drivers/gpu/drm/amd/display/dc/basics/dce_calcs.c @@ -23,8 +23,6 @@ * */ -#include <linux/slab.h> - #include "resource.h" #include "dm_services.h" #include "dce_calcs.h" |