Attachment 63520 Details for Bug 51238 – Patch to use SSC clock (proof of concept)

[patch] Patch to use SSC clock (proof of concept)

0001-Don-t-trust-the-BIOS-and-use-SSC-clock-at-100-MHz.patch (text/plain), 977 bytes, created by Anisse Astier on 2012-06-27 07:02:46 UTC

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Creator: Anisse Astier

Created: 2012-06-27 07:02:46 UTC

Size: 977 bytes

patch

obsolete

>From 5c082fc09ddca59186196239655a5500418b1417 Mon Sep 17 00:00:00 2001
>From: Anisse Astier <anisse@astier.eu>
>Date: Wed, 27 Jun 2012 15:48:16 +0200
>Subject: [PATCH] Don't trust the BIOS and use SSC clock at 100 MHz
>
>---
> drivers/gpu/drm/gma500/cdv_intel_display.c |    4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
>diff --git a/drivers/gpu/drm/gma500/cdv_intel_display.c b/drivers/gpu/drm/gma500/cdv_intel_display.c
>index c3e9a0f..a158239 100644
>--- a/drivers/gpu/drm/gma500/cdv_intel_display.c
>+++ b/drivers/gpu/drm/gma500/cdv_intel_display.c
>@@ -987,8 +987,10 @@ static int cdv_intel_crtc_mode_set(struct drm_crtc *crtc,
> 		/* high-end sku, 27/100 mhz */
> 		refclk = 27000;
> 
>+	dev_priv->lvds_use_ssc = 1;
> 	if (is_lvds && dev_priv->lvds_use_ssc) {
>-		refclk = dev_priv->lvds_ssc_freq * 1000;
>+		//refclk = dev_priv->lvds_ssc_freq * 1000;
>+		refclk = 100000 * 1000;
> 		DRM_DEBUG_KMS("Use SSC reference clock %d Mhz\n", dev_priv->lvds_ssc_freq);
> 	}
> 
>-- 
>1.7.10.3
>

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Attachments on bug 51238: 63231 | 63232 | 63233 | 63288 | 63520 | 63573 | 63575 | 63801

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