Attachment 29031 Details for Bug 22002 – disable VGA plane before doing CRT hotplug

[patch] disable VGA plane before doing CRT hotplug

disable_vga_in_crt_detection.patch (text/plain), 1.42 KB, created by ykzhao on 2009-08-30 20:26:18 UTC

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Creator: ykzhao

Created: 2009-08-30 20:26:18 UTC

Size: 1.42 KB

patch

obsolete

>disable vga plane before doing CRT hotplug
>---
> src/i830_crt.c |   33 +++++++++++++++++++++++++++++++++
> 1 file changed, 33 insertions(+)
>
>Index: xf86_video_intel/src/i830_crt.c
>===================================================================
>--- xf86_video_intel.orig/src/i830_crt.c	2009-08-25 17:20:07.000000000 +0800
>+++ xf86_video_intel/src/i830_crt.c	2009-08-31 11:23:59.000000000 +0800
>@@ -156,6 +156,38 @@
> 
>     OUTREG(ADPA, adpa);
> }
>+static void
>+disable_vga_plane (xf86OutputPtr output)
>+{
>+    ScrnInfoPtr pScrn = output->scrn;
>+    I830Ptr pI830 = I830PTR(pScrn);
>+    uint8_t sr01;
>+    uint32_t vgadisable;
>+
>+    vgadisable = INREG(VGACNTRL);
>+    if (vgadisable & VGA_DISP_DISABLE)
>+	return;
>+
>+    /*
>+     * Bug #17235: G4X machine needs following steps
>+     * for disable VGA.
>+     * - set bit 5 of SR01;
>+     * - Wait 30us;
>+     * - disable vga plane;
>+     * - restore SR01;
>+     */
>+	OUTREG8(SRX, 1);
>+	sr01 = INREG8(SRX + 1);
>+	OUTREG8(SRX + 1, sr01 | (1 << 5));
>+	usleep(30);
>+
>+    OUTREG(VGACNTRL, VGA_DISP_DISABLE);
>+    i830WaitForVblank(pScrn);
>+
>+	OUTREG8(SRX, 1);
>+	OUTREG8(SRX + 1, sr01);
>+}
>+
> 
> /**
>  * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect CRT presence.
>@@ -176,6 +208,7 @@
>     int		tries = 1;
>     int		try;
> 
>+	disable_vga_plane(output);
>     /* On 4 series desktop, CRT detect sequence need to be done twice
>      * to get a reliable result. */
>     if (IS_G4X(pI830) && !IS_GM45(pI830))

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Attachments on bug 22002: 26303 | 26304 | 26305 | 26346 | 26407 | 26518 | 26519 | 26636 | 28033 | 29031 | 29504 | 29654 | 29883

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