Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / gpu / drm / nouveau / nvkm / subdev / fb / gddr5.c

diff --git a/kernel/drivers/gpu/drm/nouveau/nvkm/subdev/fb/gddr5.c b/kernel/drivers/gpu/drm/nouveau/nvkm/subdev/fb/gddr5.c
new file mode 100644 (file)
index 0000000..f6f9eee
--- /dev/null
+++ b/kernel/drivers/gpu/drm/nouveau/nvkm/subdev/fb/gddr5.c
@@ -0,0 +1,120 @@
+/*
+ * Copyright 2013 Red Hat Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: Ben Skeggs <bskeggs@redhat.com>
+ */
+#include "priv.h"
+
+/* binary driver only executes this path if the condition (a) is true
+ * for any configuration (combination of rammap+ramcfg+timing) that
+ * can be reached on a given card.  for now, we will execute the branch
+ * unconditionally in the hope that a "false everywhere" in the bios
+ * tables doesn't actually mean "don't touch this".
+ */
+#define NOTE00(a) 1
+
+int
+nvkm_gddr5_calc(struct nvkm_ram *ram, bool nuts)
+{
+       int pd, lf, xd, vh, vr, vo, l3;
+       int WL, CL, WR, at[2], dt, ds;
+       int rq = ram->freq < 1000000; /* XXX */
+
+       switch (ram->next->bios.ramcfg_ver) {
+       case 0x11:
+               pd =  ram->next->bios.ramcfg_11_01_80;
+               lf =  ram->next->bios.ramcfg_11_01_40;
+               xd = !ram->next->bios.ramcfg_11_01_20;
+               vh =  ram->next->bios.ramcfg_11_02_10;
+               vr =  ram->next->bios.ramcfg_11_02_04;
+               vo =  ram->next->bios.ramcfg_11_06;
+               l3 = !ram->next->bios.ramcfg_11_07_02;
+               break;
+       default:
+               return -ENOSYS;
+       }
+
+       switch (ram->next->bios.timing_ver) {
+       case 0x20:
+               WL = (ram->next->bios.timing[1] & 0x00000f80) >> 7;
+               CL = (ram->next->bios.timing[1] & 0x0000001f);
+               WR = (ram->next->bios.timing[2] & 0x007f0000) >> 16;
+               at[0] = ram->next->bios.timing_20_2e_c0;
+               at[1] = ram->next->bios.timing_20_2e_30;
+               dt =  ram->next->bios.timing_20_2e_03;
+               ds =  ram->next->bios.timing_20_2f_03;
+               break;
+       default:
+               return -ENOSYS;
+       }
+
+       if (WL < 1 || WL > 7 || CL < 5 || CL > 36 || WR < 4 || WR > 35)
+               return -EINVAL;
+       CL -= 5;
+       WR -= 4;
+
+       ram->mr[0] &= ~0xf7f;
+       ram->mr[0] |= (WR & 0x0f) << 8;
+       ram->mr[0] |= (CL & 0x0f) << 3;
+       ram->mr[0] |= (WL & 0x07) << 0;
+
+       ram->mr[1] &= ~0x0bf;
+       ram->mr[1] |= (xd & 0x01) << 7;
+       ram->mr[1] |= (at[0] & 0x03) << 4;
+       ram->mr[1] |= (dt & 0x03) << 2;
+       ram->mr[1] |= (ds & 0x03) << 0;
+
+       /* this seems wrong, alternate field used for the broadcast
+        * on nuts vs non-nuts configs..  meh, it matches for now.
+        */
+       ram->mr1_nuts = ram->mr[1];
+       if (nuts) {
+               ram->mr[1] &= ~0x030;
+               ram->mr[1] |= (at[1] & 0x03) << 4;
+       }
+
+       ram->mr[3] &= ~0x020;
+       ram->mr[3] |= (rq & 0x01) << 5;
+
+       ram->mr[5] &= ~0x004;
+       ram->mr[5] |= (l3 << 2);
+
+       if (!vo)
+               vo = (ram->mr[6] & 0xff0) >> 4;
+       if (ram->mr[6] & 0x001)
+               pd = 1; /* binary driver does this.. bug? */
+       ram->mr[6] &= ~0xff1;
+       ram->mr[6] |= (vo & 0xff) << 4;
+       ram->mr[6] |= (pd & 0x01) << 0;
+
+       if (NOTE00(vr)) {
+               ram->mr[7] &= ~0x300;
+               ram->mr[7] |= (vr & 0x03) << 8;
+       }
+       ram->mr[7] &= ~0x088;
+       ram->mr[7] |= (vh & 0x01) << 7;
+       ram->mr[7] |= (lf & 0x01) << 3;
+
+       ram->mr[8] &= ~0x003;
+       ram->mr[8] |= (WR & 0x10) >> 3;
+       ram->mr[8] |= (CL & 0x10) >> 4;
+       return 0;
+}