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authorDaniel Vetter <daniel.vetter@ffwll.ch>2014-01-24 13:31:44 +0400
committerDaniel Vetter <daniel.vetter@ffwll.ch>2014-01-24 20:22:00 +0400
commit85ba7b7d399dd2c4c65bd84b9ae4dfbd707e79e7 (patch)
tree7fcb1962926051c8ae7a6dafc10ad93fd57b0470 /drivers/gpu
parent232a6ee9af8adb185640f67fcaaa9014a9aa0573 (diff)
downloadlinux-85ba7b7d399dd2c4c65bd84b9ae4dfbd707e79e7.tar.xz
Revert "drm/i915: Mask reserved bits in display/sprite address registers"
This reverts commit 446f254566ea8911c9e19c7bc8a162fc0e53cf31. I've left the masking in the pageflip code since that seems to be some useful piece of preemptive robustness. Iirc I've merged this patch under the assumption that the BIOS leaves some random gunk in the lower bits and gets unhappy if we trample on them. We have quite a few case like this, so this made sense. Now I've just learned that there's actual hardware features bits in the low 12 bits, and the kernel needs to preserve them to allow a userspace blob to do its job. Given Dave Airlie's clear stance on userspace blob drivers I've quickly chatted with him and he doesn't seem too happy. So let's revert this. If there are indeed bits that we must preserve in this range then we can ressurrect this patch, but with proper documentation for those bits supplied. And we probably also need to think a bit about interactions with our driver. Cc: Armin Reese <armin.c.reese@intel.com> Cc: Jesse Barnes <jbarnes@virtuousgeek.org> Cc: Dave Airlie <airlied@linux.ie> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu')
-rw-r--r--drivers/gpu/drm/i915/i915_reg.h2
-rw-r--r--drivers/gpu/drm/i915/intel_display.c8
-rw-r--r--drivers/gpu/drm/i915/intel_sprite.c18
3 files changed, 13 insertions, 15 deletions
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index ba0550222269..a48b7cad6f11 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -3578,8 +3578,6 @@
#define DISP_BASEADDR_MASK (0xfffff000)
#define I915_LO_DISPBASE(val) (val & ~DISP_BASEADDR_MASK)
#define I915_HI_DISPBASE(val) (val & DISP_BASEADDR_MASK)
-#define I915_MODIFY_DISPBASE(reg, gfx_addr) \
- (I915_WRITE((reg), (gfx_addr) | I915_LO_DISPBASE(I915_READ(reg))))
/* VBIOS flags */
#define SWF00 (dev_priv->info->display_mmio_offset + 0x71410)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 98371eeac77c..40a9338ad54f 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -2114,8 +2114,8 @@ static int i9xx_update_plane(struct drm_crtc *crtc, struct drm_framebuffer *fb,
fb->pitches[0]);
I915_WRITE(DSPSTRIDE(plane), fb->pitches[0]);
if (INTEL_INFO(dev)->gen >= 4) {
- I915_MODIFY_DISPBASE(DSPSURF(plane),
- i915_gem_obj_ggtt_offset(obj) + intel_crtc->dspaddr_offset);
+ I915_WRITE(DSPSURF(plane),
+ i915_gem_obj_ggtt_offset(obj) + intel_crtc->dspaddr_offset);
I915_WRITE(DSPTILEOFF(plane), (y << 16) | x);
I915_WRITE(DSPLINOFF(plane), linear_offset);
} else
@@ -2205,8 +2205,8 @@ static int ironlake_update_plane(struct drm_crtc *crtc,
i915_gem_obj_ggtt_offset(obj), linear_offset, x, y,
fb->pitches[0]);
I915_WRITE(DSPSTRIDE(plane), fb->pitches[0]);
- I915_MODIFY_DISPBASE(DSPSURF(plane),
- i915_gem_obj_ggtt_offset(obj) + intel_crtc->dspaddr_offset);
+ I915_WRITE(DSPSURF(plane),
+ i915_gem_obj_ggtt_offset(obj) + intel_crtc->dspaddr_offset);
if (IS_HASWELL(dev) || IS_BROADWELL(dev)) {
I915_WRITE(DSPOFFSET(plane), (y << 16) | x);
} else {
diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c
index fe4de89c374c..716a3c9c0751 100644
--- a/drivers/gpu/drm/i915/intel_sprite.c
+++ b/drivers/gpu/drm/i915/intel_sprite.c
@@ -141,8 +141,8 @@ vlv_update_plane(struct drm_plane *dplane, struct drm_crtc *crtc,
I915_WRITE(SPSIZE(pipe, plane), (crtc_h << 16) | crtc_w);
I915_WRITE(SPCNTR(pipe, plane), sprctl);
- I915_MODIFY_DISPBASE(SPSURF(pipe, plane), i915_gem_obj_ggtt_offset(obj) +
- sprsurf_offset);
+ I915_WRITE(SPSURF(pipe, plane), i915_gem_obj_ggtt_offset(obj) +
+ sprsurf_offset);
POSTING_READ(SPSURF(pipe, plane));
}
@@ -158,7 +158,7 @@ vlv_disable_plane(struct drm_plane *dplane, struct drm_crtc *crtc)
I915_WRITE(SPCNTR(pipe, plane), I915_READ(SPCNTR(pipe, plane)) &
~SP_ENABLE);
/* Activate double buffered register update */
- I915_MODIFY_DISPBASE(SPSURF(pipe, plane), 0);
+ I915_WRITE(SPSURF(pipe, plane), 0);
POSTING_READ(SPSURF(pipe, plane));
intel_update_sprite_watermarks(dplane, crtc, 0, 0, false, false);
@@ -315,8 +315,8 @@ ivb_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
if (intel_plane->can_scale)
I915_WRITE(SPRSCALE(pipe), sprscale);
I915_WRITE(SPRCTL(pipe), sprctl);
- I915_MODIFY_DISPBASE(SPRSURF(pipe),
- i915_gem_obj_ggtt_offset(obj) + sprsurf_offset);
+ I915_WRITE(SPRSURF(pipe),
+ i915_gem_obj_ggtt_offset(obj) + sprsurf_offset);
POSTING_READ(SPRSURF(pipe));
}
@@ -333,7 +333,7 @@ ivb_disable_plane(struct drm_plane *plane, struct drm_crtc *crtc)
if (intel_plane->can_scale)
I915_WRITE(SPRSCALE(pipe), 0);
/* Activate double buffered register update */
- I915_MODIFY_DISPBASE(SPRSURF(pipe), 0);
+ I915_WRITE(SPRSURF(pipe), 0);
POSTING_READ(SPRSURF(pipe));
/*
@@ -489,8 +489,8 @@ ilk_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
I915_WRITE(DVSSIZE(pipe), (crtc_h << 16) | crtc_w);
I915_WRITE(DVSSCALE(pipe), dvsscale);
I915_WRITE(DVSCNTR(pipe), dvscntr);
- I915_MODIFY_DISPBASE(DVSSURF(pipe),
- i915_gem_obj_ggtt_offset(obj) + dvssurf_offset);
+ I915_WRITE(DVSSURF(pipe),
+ i915_gem_obj_ggtt_offset(obj) + dvssurf_offset);
POSTING_READ(DVSSURF(pipe));
}
@@ -506,7 +506,7 @@ ilk_disable_plane(struct drm_plane *plane, struct drm_crtc *crtc)
/* Disable the scaler */
I915_WRITE(DVSSCALE(pipe), 0);
/* Flush double buffered register updates */
- I915_MODIFY_DISPBASE(DVSSURF(pipe), 0);
+ I915_WRITE(DVSSURF(pipe), 0);
POSTING_READ(DVSSURF(pipe));
/*