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path: root/drivers/gpu/drm/nouveau/nvkm/subdev/fb/gddr5.c
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Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/fb/gddr5.c')
-rw-r--r--drivers/gpu/drm/nouveau/nvkm/subdev/fb/gddr5.c121
1 files changed, 121 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/fb/gddr5.c b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/gddr5.c
new file mode 100644
index 000000000..2cc074d39
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/gddr5.c
@@ -0,0 +1,121 @@
+/*
+ * 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 "ram.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 */
+
+ xd = !ram->next->bios.ramcfg_DLLoff;
+
+ switch (ram->next->bios.ramcfg_ver) {
+ case 0x11:
+ pd = ram->next->bios.ramcfg_11_01_80;
+ lf = ram->next->bios.ramcfg_11_01_40;
+ 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;
+}