From 2d85bc8855d2734f5585861b261c5fe7a7ed92c1 Mon Sep 17 00:00:00 2001 From: Ben Skeggs Date: Mon, 23 Jan 2012 13:12:09 +1000 Subject: [PATCH] drm/nouveau/pm: introduce ram reclocking helper This will probably result in more lines of code, however, we're going to have at least 3 slightly different implementations of this very soon and I'd rather keep the ram reclocking logic separate from the hw specifics. DDR2/DDR3/GDDR3 implemented thus far, others will be added as necessary. Signed-off-by: Ben Skeggs Signed-off-by: Martin Peres --- drivers/gpu/drm/nouveau/nouveau_mem.c | 96 +++++++++++++++++++++++++++ drivers/gpu/drm/nouveau/nouveau_pm.h | 18 +++++ 2 files changed, 114 insertions(+) diff --git a/drivers/gpu/drm/nouveau/nouveau_mem.c b/drivers/gpu/drm/nouveau/nouveau_mem.c index cc46811e2d37..cf82f17cf03a 100644 --- a/drivers/gpu/drm/nouveau/nouveau_mem.c +++ b/drivers/gpu/drm/nouveau/nouveau_mem.c @@ -933,6 +933,102 @@ nouveau_mem_timing_read(struct drm_device *dev, struct nouveau_pm_memtiming *t) } } +int +nouveau_mem_exec(struct nouveau_mem_exec_func *exec, + struct nouveau_pm_level *perflvl) +{ + struct drm_nouveau_private *dev_priv = exec->dev->dev_private; + struct nouveau_pm_memtiming *info = &perflvl->timing; + u32 tMRD = 1000, tCKSRE = 0, tCKSRX = 0, tXS = 0, tDLLK = 0; + u32 mr[3] = { info->mr[0], info->mr[1], info->mr[2] }; + u32 mr1_dlloff; + + switch (dev_priv->vram_type) { + case NV_MEM_TYPE_DDR2: + tDLLK = 2000; + mr1_dlloff = 0x00000001; + break; + case NV_MEM_TYPE_DDR3: + tDLLK = 12000; + mr1_dlloff = 0x00000001; + break; + case NV_MEM_TYPE_GDDR3: + tDLLK = 40000; + mr1_dlloff = 0x00000040; + break; + default: + NV_ERROR(exec->dev, "cannot reclock unsupported memtype\n"); + return -ENODEV; + } + + /* fetch current MRs */ + switch (dev_priv->vram_type) { + case NV_MEM_TYPE_DDR3: + mr[2] = exec->mrg(exec, 2); + default: + mr[1] = exec->mrg(exec, 1); + mr[0] = exec->mrg(exec, 0); + break; + } + + /* DLL 'on' -> DLL 'off' mode, disable before entering self-refresh */ + if (!(mr[1] & mr1_dlloff) && (info->mr[1] & mr1_dlloff)) { + exec->precharge(exec); + exec->mrs (exec, 1, mr[1] | mr1_dlloff); + exec->wait(exec, tMRD); + } + + /* enter self-refresh mode */ + exec->precharge(exec); + exec->refresh(exec); + exec->refresh(exec); + exec->refresh_auto(exec, false); + exec->refresh_self(exec, true); + exec->wait(exec, tCKSRE); + + /* modify input clock frequency */ + exec->clock_set(exec); + + /* exit self-refresh mode */ + exec->wait(exec, tCKSRX); + exec->precharge(exec); + exec->refresh_self(exec, false); + exec->refresh_auto(exec, true); + exec->wait(exec, tXS); + + /* update MRs */ + if (mr[2] != info->mr[2]) { + exec->mrs (exec, 2, info->mr[2]); + exec->wait(exec, tMRD); + } + + if (mr[1] != info->mr[1]) { + exec->mrs (exec, 1, info->mr[1]); + exec->wait(exec, tMRD); + } + + if (mr[0] != info->mr[0]) { + exec->mrs (exec, 0, info->mr[0]); + exec->wait(exec, tMRD); + } + + /* update PFB timing registers */ + exec->timing_set(exec); + + /* DLL reset */ + if (!(info->mr[1] & mr1_dlloff)) { + exec->mrs (exec, 0, info->mr[0] | 0x00000100); + exec->wait(exec, tMRD); + exec->mrs (exec, 0, info->mr[0] | 0x00000000); + exec->wait(exec, tMRD); + exec->wait(exec, tDLLK); + if (dev_priv->vram_type == NV_MEM_TYPE_GDDR3) + exec->precharge(exec); + } + + return 0; +} + int nouveau_mem_vbios_type(struct drm_device *dev) { diff --git a/drivers/gpu/drm/nouveau/nouveau_pm.h b/drivers/gpu/drm/nouveau/nouveau_pm.h index 9e7ad33aa091..5a61f05f49da 100644 --- a/drivers/gpu/drm/nouveau/nouveau_pm.h +++ b/drivers/gpu/drm/nouveau/nouveau_pm.h @@ -25,6 +25,24 @@ #ifndef __NOUVEAU_PM_H__ #define __NOUVEAU_PM_H__ +struct nouveau_mem_exec_func { + struct drm_device *dev; + void (*precharge)(struct nouveau_mem_exec_func *); + void (*refresh)(struct nouveau_mem_exec_func *); + void (*refresh_auto)(struct nouveau_mem_exec_func *, bool); + void (*refresh_self)(struct nouveau_mem_exec_func *, bool); + void (*wait)(struct nouveau_mem_exec_func *, u32 nsec); + u32 (*mrg)(struct nouveau_mem_exec_func *, int mr); + void (*mrs)(struct nouveau_mem_exec_func *, int mr, u32 data); + void (*clock_set)(struct nouveau_mem_exec_func *); + void (*timing_set)(struct nouveau_mem_exec_func *); + void *priv; +}; + +/* nouveau_mem.c */ +int nouveau_mem_exec(struct nouveau_mem_exec_func *, + struct nouveau_pm_level *); + /* nouveau_pm.c */ int nouveau_pm_init(struct drm_device *dev); void nouveau_pm_fini(struct drm_device *dev); -- 2.20.1