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drm/tilcdc: Clear bits of register we're going to set.

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Bits weren't cleared so resolution changes didn't work.

Signed-off-by: Pantelis Antoniou <panto@antoniou-consulting.com>
Signed-off-by: Darren Etheridge <detheridge@ti.com>
Acked-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Pantelis Antoniou 2013-06-21 13:52:28 -05:00 • committed by Dave Airlie
parent 39de619413
commit c19b3e238d
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/tilcdc/tilcdc_crtc.c
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@ -299,6 +299,8 @@ static int tilcdc_crtc_mode_set(struct drm_crtc *crtc,
* a value of 0 as 1 * a value of 0 as 1
*/ */
if (priv->rev == 2) { if (priv->rev == 2) {
/* clear bits we're going to set */
reg &= ~0x78000033;
reg |= ((hfp-1) & 0x300) >> 8; reg |= ((hfp-1) & 0x300) >> 8;
reg |= ((hbp-1) & 0x300) >> 4; reg |= ((hbp-1) & 0x300) >> 4;
reg |= ((hsw-1) & 0x3c0) << 21; reg |= ((hsw-1) & 0x3c0) << 21;