The Gunit has a separate reg for this, so allocate some stolen space for the power context and initialize the reg.
v2: check for allocation before freeing at cleanup (Jani) v3: add comment about stolen allocation (Chris) check for lock bit before init (jbarnes) v4: check for allocation before init (jbarnes) Signed-off-by: Jesse Barnes <jbar...@virtuousgeek.org> --- drivers/gpu/drm/i915/i915_drv.h | 2 ++ drivers/gpu/drm/i915/i915_gem_stolen.c | 55 ++++++++++++++++++++++++++++++++ drivers/gpu/drm/i915/i915_reg.h | 1 + 3 files changed, 58 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 2832cdb..182c494 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -1023,6 +1023,8 @@ typedef struct drm_i915_private { struct i915_gpu_error gpu_error; + struct drm_mm_node *vlv_pctx; + /* list of fbdev register on this device */ struct intel_fbdev *fbdev; diff --git a/drivers/gpu/drm/i915/i915_gem_stolen.c b/drivers/gpu/drm/i915/i915_gem_stolen.c index efaaba5..36c9af4 100644 --- a/drivers/gpu/drm/i915/i915_gem_stolen.c +++ b/drivers/gpu/drm/i915/i915_gem_stolen.c @@ -171,11 +171,63 @@ void i915_gem_stolen_cleanup_compression(struct drm_device *dev) dev_priv->cfb_size = 0; } +static void i915_setup_pctx(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + struct drm_mm_node *pctx; + unsigned long pctx_paddr; + int pctx_size = 24*1024; + + if (I915_READ(VLV_PCBR)) /* BIOS set it up already */ + return; + + /* + * From the Gunit register HAS: + * The Gfx driver is expected to program this register and ensure + * proper allocation within Gfx stolen memory. For example, this + * register should be programmed such than the PCBR range does not + * overlap with other ranges, such as the frame buffer, protected + * memory, or any other relevant ranges. + */ + pctx = drm_mm_search_free(&dev_priv->mm.stolen, pctx_size, 4096, 0); + if (pctx) + pctx = drm_mm_get_block(pctx, pctx_size, 4096); + if (!pctx) + goto err; + + pctx_paddr = dev_priv->mm.stolen_base + pctx->start; + if (!pctx_paddr) + goto err_free_pctx; + + dev_priv->vlv_pctx = pctx; + I915_WRITE(VLV_PCBR, pctx_paddr); + + return; + +err_free_pctx: + drm_mm_put_block(pctx); +err: + DRM_DEBUG("not enough stolen space for PCTX, disabling\n"); +} + +static void i915_cleanup_pctx(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + + if (!dev_priv->vlv_pctx) + return; + + I915_WRITE(VLV_PCBR, 0); + drm_mm_put_block(dev_priv->vlv_pctx); +} + void i915_gem_cleanup_stolen(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; i915_gem_stolen_cleanup_compression(dev); + if (IS_VALLEYVIEW(dev) && i915_powersave) + i915_cleanup_pctx(dev); drm_mm_takedown(&dev_priv->mm.stolen); } @@ -193,6 +245,9 @@ int i915_gem_init_stolen(struct drm_device *dev) /* Basic memrange allocator for stolen space */ drm_mm_init(&dev_priv->mm.stolen, 0, dev_priv->gtt.stolen_size); + if (IS_VALLEYVIEW(dev) && i915_powersave) + i915_setup_pctx(dev); + return 0; } diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 834e79f..68051d6 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -677,6 +677,7 @@ #define VLV_IIR (VLV_DISPLAY_BASE + 0x20a4) #define VLV_IMR (VLV_DISPLAY_BASE + 0x20a8) #define VLV_ISR (VLV_DISPLAY_BASE + 0x20ac) +#define VLV_PCBR (VLV_DISPLAY_BASE + 0x2120) #define I915_PIPE_CONTROL_NOTIFY_INTERRUPT (1<<18) #define I915_DISPLAY_PORT_INTERRUPT (1<<17) #define I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT (1<<15) -- 1.7.10.4 _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx