Attachment 72230 Details for Bug 58843 – Patch to manually specify dotclock

Patch to manually specify dotclock

i915-force-lvds-downclock-4.diff (text/plain), 2.26 KB, created by Alexander Lam on 2012-12-28 21:52:18 UTC

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Creator: Alexander Lam

Created: 2012-12-28 21:52:18 UTC

Size: 2.26 KB

patch

obsolete

>Forces LVDS downclock with module parameter. Module paramter is the dot clock in Khz
>diff -uNrp a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
>--- a/drivers/gpu/drm/i915/i915_drv.c	2012-12-10 22:30:57.000000000 -0500
>+++ b/drivers/gpu/drm/i915/i915_drv.c	2012-12-27 16:21:43.607099597 -0500
>@@ -90,6 +90,12 @@ MODULE_PARM_DESC(lvds_channel_mode,
> 		 "Specify LVDS channel mode "
> 		 "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)");
> 
>+unsigned int i915_lvds_force_downclock __read_mostly = 0;
>+module_param_named(lvds_force_downclock, i915_lvds_force_downclock, int, 0444);
>+MODULE_PARM_DESC(lvds_force_downclock,
>+		 "Force lvds panel downclock to be on with a the "
>+		 "dotclock given");
>+
> int i915_panel_use_ssc __read_mostly = -1;
> module_param_named(lvds_use_ssc, i915_panel_use_ssc, int, 0600);
> MODULE_PARM_DESC(lvds_use_ssc,
>diff -uNrp a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
>--- a/drivers/gpu/drm/i915/i915_drv.h	2012-12-10 22:30:57.000000000 -0500
>+++ b/drivers/gpu/drm/i915/i915_drv.h	2012-12-27 16:42:25.968568436 -0500
>@@ -1210,6 +1210,7 @@ extern int i915_panel_ignore_lid __read_
> extern unsigned int i915_powersave __read_mostly;
> extern int i915_semaphores __read_mostly;
> extern unsigned int i915_lvds_downclock __read_mostly;
>+extern unsigned int i915_lvds_force_downclock __read_mostly;
> extern int i915_lvds_channel_mode __read_mostly;
> extern int i915_panel_use_ssc __read_mostly;
> extern int i915_vbt_sdvo_panel_type __read_mostly;
>diff -uNrp a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c
>--- a/drivers/gpu/drm/i915/intel_lvds.c	2012-12-10 22:30:57.000000000 -0500
>+++ b/drivers/gpu/drm/i915/intel_lvds.c	2012-12-27 16:21:43.613099523 -0500
>@@ -838,6 +838,15 @@ static void intel_find_lvds_downclock(st
> 			      "Normal clock %dKhz, downclock %dKhz\n",
> 			      fixed_mode->clock, temp_downclock);
> 	}
>+	else if (i915_lvds_force_downclock > 0 && i915_lvds_downclock) {
>+		/* Using user set downclock for LVDS. */
>+		dev_priv->lvds_downclock_avail = 1;
>+		temp_downclock = i915_lvds_force_downclock;
>+		dev_priv->lvds_downclock = temp_downclock;
>+		DRM_DEBUG_KMS("LVDS downclock forced by user. "
>+				"Normal clock %dKhz, downclock %dKhz\n",
>+				fixed_mode->clock, temp_downclock);
>+	}
> }
> 
> /*

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Attachments on bug 58843: 72230 | 72231 | 72232 | 72312 | 72313 | 72314 | 72315 | 72316 | 72317

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