[Nouveau] [PATCH 1/7] fb/gddr3: Generate MR values
Roy Spliet
rspliet at eclipso.eu
Mon Sep 29 10:27:13 PDT 2014
Signed-off-by: Roy Spliet <rspliet at eclipso.eu>
---
drivers/gpu/drm/nouveau/Makefile | 1 +
drivers/gpu/drm/nouveau/core/subdev/fb/gddr3.c | 117 +++++++++++++++++++++++++
drivers/gpu/drm/nouveau/core/subdev/fb/priv.h | 1 +
3 files changed, 119 insertions(+)
create mode 100644 drivers/gpu/drm/nouveau/core/subdev/fb/gddr3.c
diff --git a/drivers/gpu/drm/nouveau/Makefile b/drivers/gpu/drm/nouveau/Makefile
index 12c24c8..d5f5aa9 100644
--- a/drivers/gpu/drm/nouveau/Makefile
+++ b/drivers/gpu/drm/nouveau/Makefile
@@ -129,6 +129,7 @@ nouveau-y += core/subdev/fb/ramgk20a.o
nouveau-y += core/subdev/fb/ramgm107.o
nouveau-y += core/subdev/fb/sddr2.o
nouveau-y += core/subdev/fb/sddr3.o
+nouveau-y += core/subdev/fb/gddr3.o
nouveau-y += core/subdev/fb/gddr5.o
nouveau-y += core/subdev/fuse/base.o
nouveau-y += core/subdev/fuse/g80.o
diff --git a/drivers/gpu/drm/nouveau/core/subdev/fb/gddr3.c b/drivers/gpu/drm/nouveau/core/subdev/fb/gddr3.c
new file mode 100644
index 0000000..d85a25d
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/core/subdev/fb/gddr3.c
@@ -0,0 +1,117 @@
+/*
+ * 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 at redhat.com>
+ * Roy Spliet <rspliet at eclipso.eu>
+ */
+
+#include <subdev/bios.h>
+#include "priv.h"
+
+struct ramxlat {
+ int id;
+ u8 enc;
+};
+
+static inline int
+ramxlat(const struct ramxlat *xlat, int id)
+{
+ while (xlat->id >= 0) {
+ if (xlat->id == id)
+ return xlat->enc;
+ xlat++;
+ }
+ return -EINVAL;
+}
+
+static const struct ramxlat
+ramgddr3_cl_lo[] = {
+ { 7, 7 }, { 8, 0 }, { 9, 1 }, { 10, 2 }, { 11, 3 },
+ /* the below are mentioned in some, but not all, gddr3 docs */
+ { 12, 4 }, { 13, 5 }, { 14, 6 },
+ /* XXX: Per Samsung docs, are these used? They overlap with Qimonda */
+ /* { 4, 4 }, { 5, 5 }, { 6, 6 }, { 12, 8 }, { 13, 9 }, { 14, 10 },
+ * { 15, 11 }, */
+ { -1 }
+};
+
+static const struct ramxlat
+ramgddr3_cl_hi[] = {
+ { 10, 2 }, { 11, 3 }, { 12, 4 }, { 13, 5 }, { 14, 6 }, { 15, 7 },
+ { 16, 0 }, { 17, 1 },
+ { -1 }
+};
+
+static const struct ramxlat
+ramgddr3_wr_lo[] = {
+ { 5, 2 }, { 7, 4 }, { 8, 5 }, { 9, 6 }, { 10, 7 },
+ { 11, 0 },
+ /* the below are mentioned in some, but not all, gddr3 docs */
+ { 4, 1 }, { 6, 3 }, { 12, 1 }, { 13 , 2 },
+ { -1 }
+};
+
+int
+nouveau_gddr3_calc(struct nouveau_ram *ram)
+{
+ int CL, WR, CWL, DLL = 0, ODT = 0, hi;
+
+ switch (ram->next->bios.timing_ver) {
+ case 0x10:
+ CWL = ram->next->bios.timing_10_CWL;
+ CL = ram->next->bios.timing_10_CL;
+ WR = ram->next->bios.timing_10_WR;
+ DLL = !ram->next->bios.ramcfg_10_DLLoff;
+ ODT = ram->next->bios.timing_10_ODT;
+ break;
+ case 0x20:
+ CWL = (ram->next->bios.timing[1] & 0x00000f80) >> 7;
+ CL = (ram->next->bios.timing[1] & 0x0000001f) >> 0;
+ WR = (ram->next->bios.timing[2] & 0x007f0000) >> 16;
+ /* XXX: Get these values from the VBIOS instead */
+ DLL = !(ram->mr[1] & 0x1);
+ ODT = (ram->mr[1] & 0x004) >> 2 |
+ (ram->mr[1] & 0x040) >> 5 |
+ (ram->mr[1] & 0x200) >> 7;
+ break;
+ default:
+ return -ENOSYS;
+ }
+
+ hi = ram->mr[2] & 0x1;
+ CL = ramxlat(hi ? ramgddr3_cl_hi : ramgddr3_cl_lo, CL);
+ WR = ramxlat(ramgddr3_wr_lo, WR);
+ if (CL < 0 || CWL < 1 || CWL > 7 || WR < 0)
+ return -EINVAL;
+
+ ram->mr[0] &= ~0xf74;
+ ram->mr[0] |= (CWL & 0x07) << 9;
+ ram->mr[0] |= (CL & 0x07) << 4;
+ ram->mr[0] |= (CL & 0x08) >> 1;
+
+ ram->mr[1] &= ~0x3fc;
+ ram->mr[1] |= (ODT & 0x03) << 2;
+ ram->mr[1] |= (ODT & 0x03) << 8;
+ ram->mr[1] |= (WR & 0x03) << 4;
+ ram->mr[1] |= (WR & 0x04) << 5;
+ ram->mr[1] |= !DLL << 6;
+ return 0;
+}
diff --git a/drivers/gpu/drm/nouveau/core/subdev/fb/priv.h b/drivers/gpu/drm/nouveau/core/subdev/fb/priv.h
index 60322e9..283863f 100644
--- a/drivers/gpu/drm/nouveau/core/subdev/fb/priv.h
+++ b/drivers/gpu/drm/nouveau/core/subdev/fb/priv.h
@@ -37,6 +37,7 @@ extern struct nouveau_oclass gm107_ram_oclass;
int nouveau_sddr2_calc(struct nouveau_ram *ram);
int nouveau_sddr3_calc(struct nouveau_ram *ram);
+int nouveau_gddr3_calc(struct nouveau_ram *ram);
int nouveau_gddr5_calc(struct nouveau_ram *ram, bool nuts);
#define nouveau_fb_create(p,e,c,d) \
--
1.9.3
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