diff options
Diffstat (limited to 'drivers/gpu/drm/arm/display/include/malidp_utils.h')
-rw-r--r-- | drivers/gpu/drm/arm/display/include/malidp_utils.h | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/drivers/gpu/drm/arm/display/include/malidp_utils.h b/drivers/gpu/drm/arm/display/include/malidp_utils.h new file mode 100644 index 000000000..49a1d7f35 --- /dev/null +++ b/drivers/gpu/drm/arm/display/include/malidp_utils.h @@ -0,0 +1,43 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * (C) COPYRIGHT 2018 ARM Limited. All rights reserved. + * Author: James.Qian.Wang <james.qian.wang@arm.com> + * + */ +#ifndef _MALIDP_UTILS_ +#define _MALIDP_UTILS_ + +#include <linux/delay.h> +#include <linux/errno.h> + +#define has_bit(nr, mask) (BIT(nr) & (mask)) +#define has_bits(bits, mask) (((bits) & (mask)) == (bits)) + +#define dp_wait_cond(__cond, __tries, __min_range, __max_range) \ +({ \ + int num_tries = __tries; \ + while (!__cond && (num_tries > 0)) { \ + usleep_range(__min_range, __max_range); \ + num_tries--; \ + } \ + (__cond) ? 0 : -ETIMEDOUT; \ +}) + +/* the restriction of range is [start, end] */ +struct malidp_range { + u32 start; + u32 end; +}; + +static inline void set_range(struct malidp_range *rg, u32 start, u32 end) +{ + rg->start = start; + rg->end = end; +} + +static inline bool in_range(struct malidp_range *rg, u32 v) +{ + return (v >= rg->start) && (v <= rg->end); +} + +#endif /* _MALIDP_UTILS_ */ |