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Red Hat Bugzilla – Attachment 313952 Details for
Bug 454305
Blank screen using "intel" xorg driver with i845G when switching resolution
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[patch]
Disable VGA plane even if QUIRK_PIPEA_FORCE is set
intel-2.4.0-leave-pipea-alone.patch (text/plain), 2.33 KB, created by
Olivier Fourdan
on 2008-08-11 11:46:20 UTC
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Description:
Disable VGA plane even if QUIRK_PIPEA_FORCE is set
Filename:
MIME Type:
Creator:
Olivier Fourdan
Created:
2008-08-11 11:46:20 UTC
Size:
2.33 KB
patch
obsolete
>--- xf86-video-intel-2.4.0/src/i830_display.c.leave-pipea-alone 2008-08-11 10:32:10.000000000 +0100 >+++ xf86-video-intel-2.4.0/src/i830_display.c 2008-08-11 10:36:15.000000000 +0100 >@@ -854,44 +854,43 @@ > /* Give the overlay scaler a chance to disable if it's on this pipe */ > i830_crtc_dpms_video(crtc, FALSE); > >- /* May need to leave pipe A on */ >- if ((pipe == 0) && (pI830->quirk_flag & QUIRK_PIPEA_FORCE)) >- return; >- > /* Disable the VGA plane that we never use */ > OUTREG(VGACNTRL, VGA_DISP_DISABLE); > >- /* Disable display plane */ >- temp = INREG(dspcntr_reg); >- if ((temp & DISPLAY_PLANE_ENABLE) != 0) >+ /* May need to leave pipe A on */ >+ if ((pipe != 0) || (!pI830->quirk_flag & QUIRK_PIPEA_FORCE)) > { >- OUTREG(dspcntr_reg, temp & ~DISPLAY_PLANE_ENABLE); >- /* Flush the plane changes */ >- OUTREG(dspbase_reg, INREG(dspbase_reg)); >- POSTING_READ(dspbase_reg); >- } >- >- if (!IS_I9XX(pI830)) { >- /* Wait for vblank for the disable to take effect */ >- i830WaitForVblank(pScrn); >+ /* Disable display plane */ >+ temp = INREG(dspcntr_reg); >+ if ((temp & DISPLAY_PLANE_ENABLE) != 0) >+ { >+ OUTREG(dspcntr_reg, temp & ~DISPLAY_PLANE_ENABLE); >+ /* Flush the plane changes */ >+ OUTREG(dspbase_reg, INREG(dspbase_reg)); >+ POSTING_READ(dspbase_reg); >+ } >+ >+ if (!IS_I9XX(pI830)) { >+ /* Wait for vblank for the disable to take effect */ >+ i830WaitForVblank(pScrn); >+ } >+ >+ /* Next, disable display pipes */ >+ temp = INREG(pipeconf_reg); >+ if ((temp & PIPEACONF_ENABLE) != 0) { >+ OUTREG(pipeconf_reg, temp & ~PIPEACONF_ENABLE); >+ POSTING_READ(pipeconf_reg); >+ } >+ >+ /* Wait for vblank for the disable to take effect. */ >+ i830WaitForVblank(pScrn); >+ >+ temp = INREG(dpll_reg); >+ if ((temp & DPLL_VCO_ENABLE) != 0) { >+ OUTREG(dpll_reg, temp & ~DPLL_VCO_ENABLE); >+ POSTING_READ(dpll_reg); >+ } > } >- >- /* Next, disable display pipes */ >- temp = INREG(pipeconf_reg); >- if ((temp & PIPEACONF_ENABLE) != 0) { >- OUTREG(pipeconf_reg, temp & ~PIPEACONF_ENABLE); >- POSTING_READ(pipeconf_reg); >- } >- >- /* Wait for vblank for the disable to take effect. */ >- i830WaitForVblank(pScrn); >- >- temp = INREG(dpll_reg); >- if ((temp & DPLL_VCO_ENABLE) != 0) { >- OUTREG(dpll_reg, temp & ~DPLL_VCO_ENABLE); >- POSTING_READ(dpll_reg); >- } >- > /* Wait for the clocks to turn off. */ > usleep(150); > break;
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