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path: root/drivers/gpu/drm/nouveau/nv50_pm.c
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Diffstat (limited to 'drivers/gpu/drm/nouveau/nv50_pm.c')
-rw-r--r--drivers/gpu/drm/nouveau/nv50_pm.c131
1 files changed, 131 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nv50_pm.c b/drivers/gpu/drm/nouveau/nv50_pm.c
new file mode 100644
index 000000000000..7dbb305d7e63
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nv50_pm.c
@@ -0,0 +1,131 @@
+/*
+ * Copyright 2010 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
+ */
+
+#include "drmP.h"
+#include "nouveau_drv.h"
+#include "nouveau_bios.h"
+#include "nouveau_pm.h"
+
+struct nv50_pm_state {
+ struct nouveau_pm_level *perflvl;
+ struct pll_lims pll;
+ enum pll_types type;
+ int N, M, P;
+};
+
+int
+nv50_pm_clock_get(struct drm_device *dev, u32 id)
+{
+ struct pll_lims pll;
+ int P, N, M, ret;
+ u32 reg0, reg1;
+
+ ret = get_pll_limits(dev, id, &pll);
+ if (ret)
+ return ret;
+
+ reg0 = nv_rd32(dev, pll.reg + 0);
+ reg1 = nv_rd32(dev, pll.reg + 4);
+ P = (reg0 & 0x00070000) >> 16;
+ N = (reg1 & 0x0000ff00) >> 8;
+ M = (reg1 & 0x000000ff);
+
+ return ((pll.refclk * N / M) >> P);
+}
+
+void *
+nv50_pm_clock_pre(struct drm_device *dev, struct nouveau_pm_level *perflvl,
+ u32 id, int khz)
+{
+ struct nv50_pm_state *state;
+ int dummy, ret;
+
+ state = kzalloc(sizeof(*state), GFP_KERNEL);
+ if (!state)
+ return ERR_PTR(-ENOMEM);
+ state->type = id;
+ state->perflvl = perflvl;
+
+ ret = get_pll_limits(dev, id, &state->pll);
+ if (ret < 0) {
+ kfree(state);
+ return (ret == -ENOENT) ? NULL : ERR_PTR(ret);
+ }
+
+ ret = nv50_calc_pll(dev, &state->pll, khz, &state->N, &state->M,
+ &dummy, &dummy, &state->P);
+ if (ret < 0) {
+ kfree(state);
+ return ERR_PTR(ret);
+ }
+
+ return state;
+}
+
+void
+nv50_pm_clock_set(struct drm_device *dev, void *pre_state)
+{
+ struct nv50_pm_state *state = pre_state;
+ struct nouveau_pm_level *perflvl = state->perflvl;
+ u32 reg = state->pll.reg, tmp;
+ struct bit_entry BIT_M;
+ u16 script;
+ int N = state->N;
+ int M = state->M;
+ int P = state->P;
+
+ if (state->type == PLL_MEMORY && perflvl->memscript &&
+ bit_table(dev, 'M', &BIT_M) == 0 &&
+ BIT_M.version == 1 && BIT_M.length >= 0x0b) {
+ script = ROM16(BIT_M.data[0x05]);
+ if (script)
+ nouveau_bios_run_init_table(dev, script, NULL);
+ script = ROM16(BIT_M.data[0x07]);
+ if (script)
+ nouveau_bios_run_init_table(dev, script, NULL);
+ script = ROM16(BIT_M.data[0x09]);
+ if (script)
+ nouveau_bios_run_init_table(dev, script, NULL);
+
+ nouveau_bios_run_init_table(dev, perflvl->memscript, NULL);
+ }
+
+ if (state->type == PLL_MEMORY) {
+ nv_wr32(dev, 0x100210, 0);
+ nv_wr32(dev, 0x1002dc, 1);
+ }
+
+ tmp = nv_rd32(dev, reg + 0) & 0xfff8ffff;
+ tmp |= 0x80000000 | (P << 16);
+ nv_wr32(dev, reg + 0, tmp);
+ nv_wr32(dev, reg + 4, (N << 8) | M);
+
+ if (state->type == PLL_MEMORY) {
+ nv_wr32(dev, 0x1002dc, 0);
+ nv_wr32(dev, 0x100210, 0x80000000);
+ }
+
+ kfree(state);
+}
+