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authorBen Skeggs <bskeggs@redhat.com>2012-01-23 13:17:11 +1000
committerBen Skeggs <bskeggs@redhat.com>2012-03-13 17:08:18 +1000
commit6bdf68c9a427220692ad7607858e96caa2cd3147 (patch)
treee55961d2cc190fda69b14e50f5ba9733e27878fc /drivers
parent2d85bc8855d2734f5585861b261c5fe7a7ed92c1 (diff)
downloadtalos-obmc-linux-6bdf68c9a427220692ad7607858e96caa2cd3147.tar.gz
talos-obmc-linux-6bdf68c9a427220692ad7607858e96caa2cd3147.zip
drm/nv50/pm: initial work towards proper memory reclocking, with timings
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Signed-off-by: Martin Peres <martin.peres@labri.fr>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/gpu/drm/nouveau/nv50_pm.c200
1 files changed, 154 insertions, 46 deletions
diff --git a/drivers/gpu/drm/nouveau/nv50_pm.c b/drivers/gpu/drm/nouveau/nv50_pm.c
index ec5481dfcd82..17eb3277b1a0 100644
--- a/drivers/gpu/drm/nouveau/nv50_pm.c
+++ b/drivers/gpu/drm/nouveau/nv50_pm.c
@@ -352,8 +352,13 @@ nv50_pm_clocks_get(struct drm_device *dev, struct nouveau_pm_level *perflvl)
}
struct nv50_pm_state {
+ struct nouveau_pm_level *perflvl;
+
struct hwsq_ucode mclk_hwsq;
u32 mscript;
+ u32 mmast;
+ u32 mctrl;
+ u32 mcoef;
u32 emast;
u32 nctrl;
@@ -415,36 +420,155 @@ clk_same(u32 a, u32 b)
return ((a / 1000) == (b / 1000));
}
+static void
+mclk_precharge(struct nouveau_mem_exec_func *exec)
+{
+ struct nv50_pm_state *info = exec->priv;
+ struct hwsq_ucode *hwsq = &info->mclk_hwsq;
+
+ hwsq_wr32(hwsq, 0x1002d4, 0x00000001);
+}
+
+static void
+mclk_refresh(struct nouveau_mem_exec_func *exec)
+{
+ struct nv50_pm_state *info = exec->priv;
+ struct hwsq_ucode *hwsq = &info->mclk_hwsq;
+
+ hwsq_wr32(hwsq, 0x1002d0, 0x00000001);
+}
+
+static void
+mclk_refresh_auto(struct nouveau_mem_exec_func *exec, bool enable)
+{
+ struct nv50_pm_state *info = exec->priv;
+ struct hwsq_ucode *hwsq = &info->mclk_hwsq;
+
+ hwsq_wr32(hwsq, 0x100210, enable ? 0x80000000 : 0x00000000);
+}
+
+static void
+mclk_refresh_self(struct nouveau_mem_exec_func *exec, bool enable)
+{
+ struct nv50_pm_state *info = exec->priv;
+ struct hwsq_ucode *hwsq = &info->mclk_hwsq;
+
+ hwsq_wr32(hwsq, 0x1002dc, enable ? 0x00000001 : 0x00000000);
+}
+
+static void
+mclk_wait(struct nouveau_mem_exec_func *exec, u32 nsec)
+{
+ struct nv50_pm_state *info = exec->priv;
+ struct hwsq_ucode *hwsq = &info->mclk_hwsq;
+
+ if (nsec > 1000)
+ hwsq_usec(hwsq, (nsec + 500) / 1000);
+}
+
+static u32
+mclk_mrg(struct nouveau_mem_exec_func *exec, int mr)
+{
+ if (mr <= 1)
+ return nv_rd32(exec->dev, 0x1002c0 + ((mr - 0) * 4));
+ if (mr <= 3)
+ return nv_rd32(exec->dev, 0x1002e0 + ((mr - 2) * 4));
+ return 0;
+}
+
+static void
+mclk_mrs(struct nouveau_mem_exec_func *exec, int mr, u32 data)
+{
+ struct drm_nouveau_private *dev_priv = exec->dev->dev_private;
+ struct nv50_pm_state *info = exec->priv;
+ struct hwsq_ucode *hwsq = &info->mclk_hwsq;
+
+ if (mr <= 1) {
+ if (dev_priv->vram_rank_B)
+ hwsq_wr32(hwsq, 0x1002c8 + ((mr - 0) * 4), data);
+ hwsq_wr32(hwsq, 0x1002c0 + ((mr - 0) * 4), data);
+ } else
+ if (mr <= 3) {
+ if (dev_priv->vram_rank_B)
+ hwsq_wr32(hwsq, 0x1002e8 + ((mr - 2) * 4), data);
+ hwsq_wr32(hwsq, 0x1002e0 + ((mr - 2) * 4), data);
+ }
+}
+
+static void
+mclk_clock_set(struct nouveau_mem_exec_func *exec)
+{
+ struct nv50_pm_state *info = exec->priv;
+ struct hwsq_ucode *hwsq = &info->mclk_hwsq;
+ u32 ctrl = nv_rd32(exec->dev, 0x004008);
+
+ info->mmast = nv_rd32(exec->dev, 0x00c040);
+ info->mmast &= ~0xc0000000; /* get MCLK_2 from HREF */
+ info->mmast |= 0x0000c000; /* use MCLK_2 as MPLL_BYPASS clock */
+
+ hwsq_wr32(hwsq, 0xc040, info->mmast);
+ hwsq_wr32(hwsq, 0x4008, ctrl | 0x00000200); /* bypass MPLL */
+ if (info->mctrl & 0x80000000)
+ hwsq_wr32(hwsq, 0x400c, info->mcoef);
+ hwsq_wr32(hwsq, 0x4008, info->mctrl);
+}
+
+static void
+mclk_timing_set(struct nouveau_mem_exec_func *exec)
+{
+ struct drm_device *dev = exec->dev;
+ struct nv50_pm_state *info = exec->priv;
+ struct nouveau_pm_level *perflvl = info->perflvl;
+ struct hwsq_ucode *hwsq = &info->mclk_hwsq;
+ int i;
+
+ for (i = 0; i < 9; i++) {
+ u32 reg = 0x100220 + (i * 4);
+ u32 val = nv_rd32(dev, reg);
+ if (val != perflvl->timing.reg[i])
+ hwsq_wr32(hwsq, reg, perflvl->timing.reg[i]);
+ }
+}
+
static int
-calc_mclk(struct drm_device *dev, u32 freq, struct hwsq_ucode *hwsq)
+calc_mclk(struct drm_device *dev, struct nouveau_pm_level *perflvl,
+ struct nv50_pm_state *info)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
+ struct nouveau_mem_exec_func exec = {
+ .dev = dev,
+ .precharge = mclk_precharge,
+ .refresh = mclk_refresh,
+ .refresh_auto = mclk_refresh_auto,
+ .refresh_self = mclk_refresh_self,
+ .wait = mclk_wait,
+ .mrg = mclk_mrg,
+ .mrs = mclk_mrs,
+ .clock_set = mclk_clock_set,
+ .timing_set = mclk_timing_set,
+ .priv = info
+ };
+ struct hwsq_ucode *hwsq = &info->mclk_hwsq;
struct pll_lims pll;
- u32 mast = nv_rd32(dev, 0x00c040);
- u32 ctrl = nv_rd32(dev, 0x004008);
- u32 coef = nv_rd32(dev, 0x00400c);
- u32 orig = ctrl;
u32 crtc_mask = 0;
int N, M, P;
int ret, i;
/* use pcie refclock if possible, otherwise use mpll */
- ctrl &= ~0x81ff0200;
- if (clk_same(freq, read_clk(dev, clk_src_href))) {
- ctrl |= 0x00000200 | (pll.log2p_bias << 19);
+ info->mctrl = nv_rd32(dev, 0x004008);
+ info->mctrl &= ~0x81ff0200;
+ if (clk_same(perflvl->memory, read_clk(dev, clk_src_href))) {
+ info->mctrl |= 0x00000200 | (pll.log2p_bias << 19);
} else {
- ret = calc_pll(dev, 0x4008, &pll, freq, &N, &M, &P);
+ ret = calc_pll(dev, 0x4008, &pll, perflvl->memory, &N, &M, &P);
if (ret == 0)
return -EINVAL;
- ctrl |= 0x80000000 | (P << 22) | (P << 16);
- ctrl |= pll.log2p_bias << 19;
- coef = (N << 8) | M;
+ info->mctrl |= 0x80000000 | (P << 22) | (P << 16);
+ info->mctrl |= pll.log2p_bias << 19;
+ info->mcoef = (N << 8) | M;
}
- mast &= ~0xc0000000; /* get MCLK_2 from HREF */
- mast |= 0x0000c000; /* use MCLK_2 as MPLL_BYPASS clock */
-
/* determine active crtcs */
for (i = 0; i < 2; i++) {
if (nv_rd32(dev, NV50_PDISPLAY_CRTC_C(i, CLOCK)))
@@ -462,25 +586,10 @@ calc_mclk(struct drm_device *dev, u32 freq, struct hwsq_ucode *hwsq)
hwsq_setf(hwsq, 0x10, 0); /* disable bus access */
hwsq_op5f(hwsq, 0x00, 0x01); /* no idea :s */
- /* prepare memory controller */
- hwsq_wr32(hwsq, 0x1002d4, 0x00000001); /* precharge banks and idle */
- hwsq_wr32(hwsq, 0x1002d0, 0x00000001); /* force refresh */
- hwsq_wr32(hwsq, 0x100210, 0x00000000); /* stop the automatic refresh */
- hwsq_wr32(hwsq, 0x1002dc, 0x00000001); /* start self refresh mode */
-
- /* reclock memory */
- hwsq_wr32(hwsq, 0xc040, mast);
- hwsq_wr32(hwsq, 0x4008, orig | 0x00000200); /* bypass MPLL */
- hwsq_wr32(hwsq, 0x400c, coef);
- hwsq_wr32(hwsq, 0x4008, ctrl);
-
- /* restart memory controller */
- hwsq_wr32(hwsq, 0x1002d4, 0x00000001); /* precharge banks and idle */
- hwsq_wr32(hwsq, 0x1002dc, 0x00000000); /* stop self refresh mode */
- hwsq_wr32(hwsq, 0x100210, 0x80000000); /* restart automatic refresh */
- hwsq_usec(hwsq, 12); /* wait for the PLL to stabilize */
-
- hwsq_usec(hwsq, 48); /* may be unnecessary: causes flickering */
+ ret = nouveau_mem_exec(&exec, perflvl);
+ if (ret)
+ return ret;
+
hwsq_setf(hwsq, 0x10, 1); /* enable bus access */
hwsq_op5f(hwsq, 0x00, 0x00); /* no idea, reverse of 0x00, 0x01? */
if (dev_priv->chipset >= 0x92)
@@ -506,6 +615,17 @@ nv50_pm_clocks_pre(struct drm_device *dev, struct nouveau_pm_level *perflvl)
info = kmalloc(sizeof(*info), GFP_KERNEL);
if (!info)
return ERR_PTR(-ENOMEM);
+ info->perflvl = perflvl;
+
+ /* memory: build hwsq ucode which we'll use to reclock memory.
+ * use pcie refclock if possible, otherwise use mpll */
+ info->mclk_hwsq.len = 0;
+ if (perflvl->memory) {
+ ret = calc_mclk(dev, perflvl, info);
+ if (ret)
+ goto error;
+ info->mscript = perflvl->memscript;
+ }
/* core: for the moment at least, always use nvpll */
clk = calc_pll(dev, 0x4028, &pll, perflvl->core, &N, &M, &P1);
@@ -536,18 +656,6 @@ nv50_pm_clocks_pre(struct drm_device *dev, struct nouveau_pm_level *perflvl)
info->scoef = (N << 8) | M;
}
- /* memory: build hwsq ucode which we'll use to reclock memory */
- info->mclk_hwsq.len = 0;
- if (perflvl->memory) {
- clk = calc_mclk(dev, perflvl->memory, &info->mclk_hwsq);
- if (clk < 0) {
- ret = clk;
- goto error;
- }
-
- info->mscript = perflvl->memscript;
- }
-
/* vdec: avoid modifying xpll until we know exactly how the other
* clock domains work, i suspect at least some of them can also be
* tied to xpll...
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