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drm/nouveau: Fix backlight control on PPC machines with an internal TMDS panel.

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This commit fixes fdo bug 29685.

Reported-by: Vlado Plaga <rechner@vlado-do.de>
Signed-off-by: Francisco Jerez <currojerez@riseup.net>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Francisco Jerez
2010-08-20 14:19:45 +02:00
committed by Ben Skeggs
parent f5cb8ab154
commit d31e078d84
2 changed files with 27 additions and 21 deletions
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23
drivers/gpu/drm/nouveau/nv04_dfp.c
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@@ -475,6 +475,27 @@ static void nv04_dfp_commit(struct drm_encoder *encoder)
nv_crtc->index, '@' + ffs(nv_encoder->dcb->or));
}
static void nv04_dfp_update_backlight(struct drm_encoder *encoder, int mode)
{
#ifdef __powerpc__
struct drm_device *dev = encoder->dev;
/* BIOS scripts usually take care of the backlight, thanks
* Apple for your consistency.
*/
if (dev->pci_device == 0x0179 || dev->pci_device == 0x0189 ||
dev->pci_device == 0x0329) {
if (mode == DRM_MODE_DPMS_ON) {
nv_mask(dev, NV_PBUS_DEBUG_DUALHEAD_CTL, 0, 1 << 31);
nv_mask(dev, NV_PCRTC_GPIO_EXT, 3, 1);
} else {
nv_mask(dev, NV_PBUS_DEBUG_DUALHEAD_CTL, 1 << 31, 0);
nv_mask(dev, NV_PCRTC_GPIO_EXT, 3, 0);
}
}
#endif
}
static inline bool is_powersaving_dpms(int mode)
{
return (mode != DRM_MODE_DPMS_ON);
@@ -522,6 +543,7 @@ static void nv04_lvds_dpms(struct drm_encoder *encoder, int mode)
LVDS_PANEL_OFF, 0);
}
nv04_dfp_update_backlight(encoder, mode);
nv04_dfp_update_fp_control(encoder, mode);
if (mode == DRM_MODE_DPMS_ON)
@@ -545,6 +567,7 @@ static void nv04_tmds_dpms(struct drm_encoder *encoder, int mode)
NV_INFO(dev, "Setting dpms mode %d on tmds encoder (output %d)\n",
mode, nv_encoder->dcb->index);
nv04_dfp_update_backlight(encoder, mode);
nv04_dfp_update_fp_control(encoder, mode);
}