Attachment 13717 Details for Bug 13326 – enable ssc for lvds dual channel

[patch] enable ssc for lvds dual channel

enable-ssc-for-lvds-dual-channel.patch (text/plain), 1.03 KB, created by Hong Liu on 2008-01-15 00:29:10 UTC

(hide)

Description:

Filename:

MIME Type:

Creator: Hong Liu

Created: 2008-01-15 00:29:10 UTC

Size: 1.03 KB

patch

obsolete

>diff --git a/src/i830_display.c b/src/i830_display.c
>index d16871d..56efa17 100644
>--- a/src/i830_display.c
>+++ b/src/i830_display.c
>@@ -1033,6 +1033,12 @@ i830_crtc_mode_set(xf86CrtcPtr crtc, DisplayModePtr mode,
> 
>     if (IS_I9XX(pI830)) {
> 	refclk = 96000;
>+	/* for test only: enable SSC clock (100MHz) if dual channel */
>+	if (is_lvds &&
>+	    ((INREG(LVDS) & LVDS_CLKB_POWER_MASK) == LVDS_CLKB_POWER_UP)) {
>+	    xf86DrvMsg(pScrn->scrnIndex, X_WARNING, "enable SSC clock for LVDS\n");
>+	    refclk = 100000;
>+	}
>     } else {
> 	refclk = 48000;
>     }
>@@ -1188,6 +1194,14 @@ i830_crtc_mode_set(xf86CrtcPtr crtc, DisplayModePtr mode,
>     {
> 	CARD32 lvds = INREG(LVDS);
> 
>+	/* for test only: enable SSC clock (100MHz) if dual channel */
>+	if ((lvds & LVDS_CLKB_POWER_MASK) == LVDS_CLKB_POWER_UP) {
>+	    xf86DrvMsg(pScrn->scrnIndex, X_WARNING,
>+		       "enable SSC clock for LVDS, setting dpll_b\n");
>+	    dpll &= ~PLL_REF_INPUT_MASK;
>+	    dpll |= PLLB_REF_INPUT_SPREADSPECTRUMIN;
>+	}
>+
> 	if (dpll & DPLL_VCO_ENABLE)
> 	{
> 	    OUTREG(fp_reg, fp);

Actions: View | Splinter Review

Attachments on bug 13326: 12690 | 12691 | 12704 | 12833 | 12921 | 12933 | 12983 | 13717 | 14432 | 15590 | 16394 | 16666 | 16667

Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.