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drm/i915: Drop useless posting reads from cursor commit

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There should be no need to do posting reads between all the cursor
register accessess. Let's just drop them.

v2: Rebase due to I915_WRITE_FW() and uncore.lock

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> #v1
Link: http://patchwork.freedesktop.org/patch/msgid/20170327185546.2977-8-ville.syrjala@linux.intel.com
This commit is contained in:
Ville Syrjälä 2017-03-27 21:55:38 +03:00
parent b2d03b0ddf
commit 75343a44c9
1 changed files with 15 additions and 17 deletions
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28
drivers/gpu/drm/i915/intel_display.c
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@ -9232,30 +9232,28 @@ static void i845_update_cursor(struct intel_plane *plane,
* whilst the cursor is disabled.
*/
I915_WRITE_FW(CURCNTR(PIPE_A), 0);
POSTING_READ_FW(CURCNTR(PIPE_A));
plane->cursor.cntl = 0;
}
if (plane->cursor.base != base) {
if (plane->cursor.base != base)
I915_WRITE_FW(CURBASE(PIPE_A), base);
plane->cursor.base = base;
}
if (plane->cursor.size != size) {
if (plane->cursor.size != size)
I915_WRITE_FW(CURSIZE, size);
plane->cursor.size = size;
}
if (cntl)
I915_WRITE_FW(CURPOS(PIPE_A), pos);
if (plane->cursor.cntl != cntl) {
if (plane->cursor.cntl != cntl)
I915_WRITE_FW(CURCNTR(PIPE_A), cntl);
POSTING_READ_FW(CURCNTR(PIPE_A));
plane->cursor.cntl = cntl;
}
spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
plane->cursor.cntl = cntl;
plane->cursor.base = base;
plane->cursor.size = size;
}
static void i845_disable_cursor(struct intel_plane *plane,
@ -9318,21 +9316,21 @@ static void i9xx_update_cursor(struct intel_plane *plane,
spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
if (plane->cursor.cntl != cntl) {
if (plane->cursor.cntl != cntl)
I915_WRITE_FW(CURCNTR(pipe), cntl);
POSTING_READ_FW(CURCNTR(pipe));
plane->cursor.cntl = cntl;
}
if (cntl)
I915_WRITE_FW(CURPOS(pipe), pos);
/* and commit changes on next vblank */
if (plane->cursor.cntl != cntl ||
plane->cursor.base != base)
I915_WRITE_FW(CURBASE(pipe), base);
POSTING_READ_FW(CURBASE(pipe));
spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
plane->cursor.cntl = cntl;
plane->cursor.base = base;
}