drivers/gpu/drm/lima/lima_bcast.c

   1 // SPDX-License-Identifier: GPL-2.0 OR MIT
   2 /* Copyright 2018-2019 Qiang Yu <yuq825@gmail.com> */
   3
   4 #include <linux/io.h>
   5 #include <linux/device.h>
   6
   7 #include "lima_device.h"
   8 #include "lima_bcast.h"
   9 #include "lima_regs.h"
  10
  11 #define bcast_write(reg, data) writel(data, ip->iomem + reg)
  12 #define bcast_read(reg) readl(ip->iomem + reg)
  13
  14 void lima_bcast_enable(struct lima_device *dev, int num_pp)
  15 {
  16         struct lima_sched_pipe *pipe = dev->pipe + lima_pipe_pp;
  17         struct lima_ip *ip = dev->ip + lima_ip_bcast;
  18         int i, mask = bcast_read(LIMA_BCAST_BROADCAST_MASK) & 0xffff0000;
  19
  20         for (i = 0; i < num_pp; i++) {
  21                 struct lima_ip *pp = pipe->processor[i];
  22
  23                 mask |= 1 << (pp->id - lima_ip_pp0);
  24         }
  25
  26         bcast_write(LIMA_BCAST_BROADCAST_MASK, mask);
  27 }
  28
  29 static int lima_bcast_hw_init(struct lima_ip *ip)
  30 {
  31         bcast_write(LIMA_BCAST_BROADCAST_MASK, ip->data.mask << 16);
  32         bcast_write(LIMA_BCAST_INTERRUPT_MASK, ip->data.mask);
  33         return 0;
  34 }
  35
  36 int lima_bcast_resume(struct lima_ip *ip)
  37 {
  38         return lima_bcast_hw_init(ip);
  39 }
  40
  41 void lima_bcast_suspend(struct lima_ip *ip)
  42 {
  43
  44 }
  45
  46 int lima_bcast_init(struct lima_ip *ip)
  47 {
  48         int i;
  49
  50         for (i = lima_ip_pp0; i <= lima_ip_pp7; i++) {
  51                 if (ip->dev->ip[i].present)
  52                         ip->data.mask |= 1 << (i - lima_ip_pp0);
  53         }
  54
  55         return lima_bcast_hw_init(ip);
  56 }
  57
  58 void lima_bcast_fini(struct lima_ip *ip)
  59 {
  60
  61 }
  62