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5b075ee3b7
https://bugs.freedesktop.org/show_bug.cgi?id=97822 http://bugs.rosalinux.ru/show_bug.cgi?id=7533 Allows to specify i915.vbt_sdvo_panel_type=0 in the kernel command line at boot time as a workaround to the above issues.
54 lines
1.7 KiB
Diff
54 lines
1.7 KiB
Diff
A hack used when investigating https://bugs.freedesktop.org/show_bug.cgi?id=97822.
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From 8f6bd6297a9c62f03aa3ff3855ff4a159fddd55a Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <ville.syrjala@linux.intel.com>
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Date: Thu, 6 Oct 2016 18:30:38 +0300
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Subject: [PATCH] drm/i915/hack: Abuse i915.vbt_sdvo_panel_type also for
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LVDS/eDP/DSI
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---
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drivers/gpu/drm/i915/intel_bios.c | 6 ++++++
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1 file changed, 6 insertions(+)
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diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios.c
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index 1f8af87..0404478 100644
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--- a/drivers/gpu/drm/i915/intel_bios.c
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+++ b/drivers/gpu/drm/i915/intel_bios.c
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@@ -218,19 +218,25 @@ parse_lfp_panel_data(struct drm_i915_private *dev_priv,
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dev_priv->vbt.lvds_dither = lvds_options->pixel_dither;
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- ret = intel_opregion_get_panel_type(dev_priv);
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- if (ret >= 0) {
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- WARN_ON(ret > 0xf);
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- panel_type = ret;
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- DRM_DEBUG_KMS("Panel type: %d (OpRegion)\n", panel_type);
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- } else {
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- if (lvds_options->panel_type > 0xf) {
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- DRM_DEBUG_KMS("Invalid VBT panel type 0x%x\n",
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- lvds_options->panel_type);
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- return;
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+ panel_type = i915.vbt_sdvo_panel_type;
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+ if (panel_type == -2)
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+ return;
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+
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+ if (panel_type < 0) {
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+ ret = intel_opregion_get_panel_type(dev_priv);
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+ if (ret >= 0) {
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+ WARN_ON(ret > 0xf);
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+ panel_type = ret;
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+ DRM_DEBUG_KMS("Panel type: %d (OpRegion)\n", panel_type);
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+ } else {
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+ if (lvds_options->panel_type > 0xf) {
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+ DRM_DEBUG_KMS("Invalid VBT panel type 0x%x\n",
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+ lvds_options->panel_type);
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+ return;
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+ }
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+ panel_type = lvds_options->panel_type;
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+ DRM_DEBUG_KMS("Panel type: %d (VBT)\n", panel_type);
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}
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- panel_type = lvds_options->panel_type;
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- DRM_DEBUG_KMS("Panel type: %d (VBT)\n", panel_type);
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}
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dev_priv->vbt.panel_type = panel_type;
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