root/drivers/gpu/drm/arm/display/include/malidp_utils.h

INCLUDED FROM

DEFINITIONS

1. set_range
2. in_range

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * (C) COPYRIGHT 2018 ARM Limited. All rights reserved.
   4  * Author: James.Qian.Wang <james.qian.wang@arm.com>
   5  *
   6  */
   7 #ifndef _MALIDP_UTILS_
   8 #define _MALIDP_UTILS_
   9 
  10 #include <linux/delay.h>
  11 #include <linux/errno.h>
  12 
  13 #define has_bit(nr, mask)       (BIT(nr) & (mask))
  14 #define has_bits(bits, mask)    (((bits) & (mask)) == (bits))
  15 
  16 #define dp_for_each_set_bit(bit, mask) \
  17         for_each_set_bit((bit), ((unsigned long *)&(mask)), sizeof(mask) * 8)
  18 
  19 #define dp_wait_cond(__cond, __tries, __min_range, __max_range) \
  20 ({                                                      \
  21         int num_tries = __tries;                        \
  22         while (!__cond && (num_tries > 0)) {            \
  23                 usleep_range(__min_range, __max_range); \
  24                 num_tries--;                            \
  25         }                                               \
  26         (__cond) ? 0 : -ETIMEDOUT;                      \
  27 })
  28 
  29 /* the restriction of range is [start, end] */
  30 struct malidp_range {
  31         u32 start;
  32         u32 end;
  33 };
  34 
  35 static inline void set_range(struct malidp_range *rg, u32 start, u32 end)
  36 {
  37         rg->start = start;
  38         rg->end   = end;
  39 }
  40 
  41 static inline bool in_range(struct malidp_range *rg, u32 v)
  42 {
  43         return (v >= rg->start) && (v <= rg->end);
  44 }
  45 
  46 #endif /* _MALIDP_UTILS_ */