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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/gpu/drm/nouveau/nvkm/subdev/fb/sddr2.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/fb/sddr2.c')
-rw-r--r--drivers/gpu/drm/nouveau/nvkm/subdev/fb/sddr2.c100
1 files changed, 100 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/fb/sddr2.c b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/sddr2.c
new file mode 100644
index 000000000..4dcd8742f
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/sddr2.c
@@ -0,0 +1,100 @@
+/*
+ * Copyright 2014 Roy Spliet
+ *
+ * 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: Roy Spliet <rspliet@eclipso.eu>
+ * Ben Skeggs
+ */
+#include "priv.h"
+#include "ram.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
+ramddr2_cl[] = {
+ { 2, 2 }, { 3, 3 }, { 4, 4 }, { 5, 5 }, { 6, 6 },
+ /* The following are available in some, but not all DDR2 docs */
+ { 7, 7 },
+ { -1 }
+};
+
+static const struct ramxlat
+ramddr2_wr[] = {
+ { 2, 1 }, { 3, 2 }, { 4, 3 }, { 5, 4 }, { 6, 5 },
+ /* The following are available in some, but not all DDR2 docs */
+ { 7, 6 },
+ { -1 }
+};
+
+int
+nvkm_sddr2_calc(struct nvkm_ram *ram)
+{
+ int CL, WR, DLL = 0, ODT = 0;
+
+ switch (ram->next->bios.timing_ver) {
+ case 0x10:
+ CL = ram->next->bios.timing_10_CL;
+ WR = ram->next->bios.timing_10_WR;
+ DLL = !ram->next->bios.ramcfg_DLLoff;
+ ODT = ram->next->bios.timing_10_ODT & 3;
+ break;
+ case 0x20:
+ CL = (ram->next->bios.timing[1] & 0x0000001f);
+ WR = (ram->next->bios.timing[2] & 0x007f0000) >> 16;
+ break;
+ default:
+ return -ENOSYS;
+ }
+
+ if (ram->next->bios.timing_ver == 0x20 ||
+ ram->next->bios.ramcfg_timing == 0xff) {
+ ODT = (ram->mr[1] & 0x004) >> 2 |
+ (ram->mr[1] & 0x040) >> 5;
+ }
+
+ CL = ramxlat(ramddr2_cl, CL);
+ WR = ramxlat(ramddr2_wr, WR);
+ if (CL < 0 || WR < 0)
+ return -EINVAL;
+
+ ram->mr[0] &= ~0xf70;
+ ram->mr[0] |= (WR & 0x07) << 9;
+ ram->mr[0] |= (CL & 0x07) << 4;
+
+ ram->mr[1] &= ~0x045;
+ ram->mr[1] |= (ODT & 0x1) << 2;
+ ram->mr[1] |= (ODT & 0x2) << 5;
+ ram->mr[1] |= !DLL;
+ return 0;
+}