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Orlando Chamberlain
77 lines
2.9 KiB
Diff
77 lines
2.9 KiB
Diff
From 12c7a3306a631a651464ef56318a218dc4cdb157 Mon Sep 17 00:00:00 2001
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From: Orlando Chamberlain <orlandoch.dev@gmail.com>
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Date: Sat, 18 Feb 2023 23:05:05 +1100
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Subject: [PATCH 8/9] i915: 4 lane quirk for mbp15,1
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Needed to use iGPU when dGPU was boot GPU
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Patch written by Kerem Karabay <kekrby@gmail.com>
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---
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drivers/gpu/drm/i915/display/intel_ddi.c | 3 +++
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drivers/gpu/drm/i915/display/intel_quirks.c | 15 +++++++++++++++
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drivers/gpu/drm/i915/display/intel_quirks.h | 1 +
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3 files changed, 19 insertions(+)
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diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
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index 0f1ec2a98cc8..1ec67390f623 100644
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--- a/drivers/gpu/drm/i915/display/intel_ddi.c
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+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
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@@ -4097,6 +4097,9 @@ static bool intel_ddi_a_force_4_lanes(struct intel_digital_port *dig_port)
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if (dig_port->saved_port_bits & DDI_A_4_LANES)
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return false;
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+ if (intel_has_quirk(dev_priv, QUIRK_DDI_A_FORCE_4_LANES))
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+ return true;
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+
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/* Broxton/Geminilake: Bspec says that DDI_A_4_LANES is the only
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* supported configuration
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*/
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diff --git a/drivers/gpu/drm/i915/display/intel_quirks.c b/drivers/gpu/drm/i915/display/intel_quirks.c
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index 6e48d3bcdfec..a8c55e165b46 100644
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--- a/drivers/gpu/drm/i915/display/intel_quirks.c
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+++ b/drivers/gpu/drm/i915/display/intel_quirks.c
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@@ -59,6 +59,18 @@ static void quirk_increase_ddi_disabled_time(struct drm_i915_private *i915)
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drm_info(&i915->drm, "Applying Increase DDI Disabled quirk\n");
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}
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+/*
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+ * In some cases, the firmware might not set the lane count to 4 (for example,
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+ * when booting in some dual GPU Macs with the dGPU as the default GPU), this
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+ * quirk is used to force it as otherwise it might not be possible to compute a
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+ * valid link configuration.
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+ */
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+static void quirk_ddi_a_force_4_lanes(struct drm_i915_private *i915)
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+{
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+ intel_set_quirk(i915, QUIRK_DDI_A_FORCE_4_LANES);
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+ drm_info(&i915->drm, "Applying DDI A Forced 4 Lanes quirk\n");
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+}
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+
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static void quirk_no_pps_backlight_power_hook(struct drm_i915_private *i915)
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{
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intel_set_quirk(i915, QUIRK_NO_PPS_BACKLIGHT_POWER_HOOK);
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@@ -199,6 +211,9 @@ static struct intel_quirk intel_quirks[] = {
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/* ECS Liva Q2 */
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{ 0x3185, 0x1019, 0xa94d, quirk_increase_ddi_disabled_time },
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{ 0x3184, 0x1019, 0xa94d, quirk_increase_ddi_disabled_time },
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+
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+ /* Apple MacBookPro15,1 */
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+ { 0x3e9b, 0x106b, 0x0176, quirk_ddi_a_force_4_lanes },
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};
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void intel_init_quirks(struct drm_i915_private *i915)
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diff --git a/drivers/gpu/drm/i915/display/intel_quirks.h b/drivers/gpu/drm/i915/display/intel_quirks.h
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index 10a4d163149f..78aacf1f6f5c 100644
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--- a/drivers/gpu/drm/i915/display/intel_quirks.h
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+++ b/drivers/gpu/drm/i915/display/intel_quirks.h
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@@ -17,6 +17,7 @@ enum intel_quirk_id {
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QUIRK_INVERT_BRIGHTNESS,
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QUIRK_LVDS_SSC_DISABLE,
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QUIRK_NO_PPS_BACKLIGHT_POWER_HOOK,
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+ QUIRK_DDI_A_FORCE_4_LANES,
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};
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void intel_init_quirks(struct drm_i915_private *i915);
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--
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2.39.1
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