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authorBen Skeggs <bskeggs@redhat.com>2010-09-16 10:17:35 +0400
committerBen Skeggs <bskeggs@redhat.com>2010-09-24 10:27:06 +0400
commit02c30ca0a1d6d8b878fc32f47b3b25192ef4a8ef (patch)
tree7f8e859b1ea46c8e96a90528c092a0e01462feb6 /drivers/gpu/drm/nouveau/nv50_pm.c
parent330c5988ee78045e6a731c3693251aaa5b0d14e3 (diff)
downloadlinux-02c30ca0a1d6d8b878fc32f47b3b25192ef4a8ef.tar.xz
drm/nv50: import initial clock get/set routines + hook up pm engine
This will make nouveau_pm attempt to report the card's current performance level both during bootup, and through sysfs. This is a very initial implementation, and can be improved a *lot* Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/nouveau/nv50_pm.c')
-rw-r--r--drivers/gpu/drm/nouveau/nv50_pm.c126
1 files changed, 126 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..a616e4240346
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nv50_pm.c
@@ -0,0 +1,126 @@
+/*
+ * 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_pm.h"
+
+/*XXX: boards using limits 0x40 need fixing, the register layout
+ * is correct here, but, there's some other funny magic
+ * that modifies things, so it's not likely we'll set/read
+ * the correct timings yet.. working on it...
+ */
+
+struct nv50_pm_state {
+ 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;
+
+ if (pll.vco2.maxfreq) {
+ 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);
+ }
+
+ reg0 = nv_rd32(dev, pll.reg + 4);
+ P = (reg0 & 0x003f0000) >> 16;
+ N = (reg0 & 0x0000ff00) >> 8;
+ M = (reg0 & 0x000000ff);
+ return pll.refclk * N / M / P;
+}
+
+void *
+nv50_pm_clock_pre(struct drm_device *dev, 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;
+
+ ret = get_pll_limits(dev, id, &state->pll);
+ if (ret < 0) {
+ kfree(state);
+ return 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;
+ u32 reg = state->pll.reg, tmp;
+ int N = state->N;
+ int M = state->M;
+ int P = state->P;
+
+ if (state->pll.vco2.maxfreq) {
+ 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);
+ }
+ } else {
+ nv_wr32(dev, reg + 4, (P << 16) | (N << 8) | M);
+ }
+
+ kfree(state);
+}
+