40 lines · c
1/* SPDX-License-Identifier: GPL-2.0 */2#ifndef __PXA3XX_GCU_H__3#define __PXA3XX_GCU_H__4 5#include <linux/types.h>6 7/* Number of 32bit words in display list (ring buffer). */8#define PXA3XX_GCU_BUFFER_WORDS ((256 * 1024 - 256) / 4)9 10/* To be increased when breaking the ABI */11#define PXA3XX_GCU_SHARED_MAGIC 0x3000000112 13#define PXA3XX_GCU_BATCH_WORDS 819214 15struct pxa3xx_gcu_shared {16 u32 buffer[PXA3XX_GCU_BUFFER_WORDS];17 18 bool hw_running;19 20 unsigned long buffer_phys;21 22 unsigned int num_words;23 unsigned int num_writes;24 unsigned int num_done;25 unsigned int num_interrupts;26 unsigned int num_wait_idle;27 unsigned int num_wait_free;28 unsigned int num_idle;29 30 u32 magic;31};32 33/* Initialization and synchronization.34 * Hardware is started upon write(). */35#define PXA3XX_GCU_IOCTL_RESET _IO('G', 0)36#define PXA3XX_GCU_IOCTL_WAIT_IDLE _IO('G', 2)37 38#endif /* __PXA3XX_GCU_H__ */39 40