From 8a84123c2f8619a14f9fc493db2528e59fcc0db8 Mon Sep 17 00:00:00 2001 From: Orlando Chamberlain Date: Fri, 28 Jun 2024 04:43:50 +0000 Subject: [PATCH 8/9] i915: 4 lane quirk for mbp15,1 Needed to use iGPU when dGPU was boot GPU Patch written by Kerem Karabay --- drivers/gpu/drm/i915/display/intel_ddi.c | 4 ++++ drivers/gpu/drm/i915/display/intel_quirks.c | 15 +++++++++++++++ drivers/gpu/drm/i915/display/intel_quirks.h | 1 + 3 files changed, 20 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c index 3c3fc5337..c16e0b1d1 100644 --- a/drivers/gpu/drm/i915/display/intel_ddi.c +++ b/drivers/gpu/drm/i915/display/intel_ddi.c @@ -4645,6 +4645,7 @@ intel_ddi_init_hdmi_connector(struct intel_digital_port *dig_port) static bool intel_ddi_a_force_4_lanes(struct intel_digital_port *dig_port) { + struct intel_display *display = to_intel_display(dig_port); struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev); if (dig_port->base.port != PORT_A) @@ -4653,6 +4654,9 @@ static bool intel_ddi_a_force_4_lanes(struct intel_digital_port *dig_port) if (dig_port->saved_port_bits & DDI_A_4_LANES) return false; + if (intel_has_quirk(display, QUIRK_DDI_A_FORCE_4_LANES)) + return true; + /* Broxton/Geminilake: Bspec says that DDI_A_4_LANES is the only * supported configuration */ diff --git a/drivers/gpu/drm/i915/display/intel_quirks.c b/drivers/gpu/drm/i915/display/intel_quirks.c index 14d5fefc9..727639b8f 100644 --- a/drivers/gpu/drm/i915/display/intel_quirks.c +++ b/drivers/gpu/drm/i915/display/intel_quirks.c @@ -59,6 +59,18 @@ static void quirk_increase_ddi_disabled_time(struct intel_display *display) drm_info(display->drm, "Applying Increase DDI Disabled quirk\n"); } +/* + * In some cases, the firmware might not set the lane count to 4 (for example, + * when booting in some dual GPU Macs with the dGPU as the default GPU), this + * quirk is used to force it as otherwise it might not be possible to compute a + * valid link configuration. + */ +static void quirk_ddi_a_force_4_lanes(struct intel_display *display) +{ + intel_set_quirk(display, QUIRK_DDI_A_FORCE_4_LANES); + drm_info(display->drm, "Applying DDI A Forced 4 Lanes quirk\n"); +} + static void quirk_no_pps_backlight_power_hook(struct intel_display *display) { intel_set_quirk(display, QUIRK_NO_PPS_BACKLIGHT_POWER_HOOK); @@ -201,6 +213,9 @@ static struct intel_quirk intel_quirks[] = { { 0x3184, 0x1019, 0xa94d, quirk_increase_ddi_disabled_time }, /* HP Notebook - 14-r206nv */ { 0x0f31, 0x103c, 0x220f, quirk_invert_brightness }, + + /* Apple MacBookPro15,1 */ + { 0x3e9b, 0x106b, 0x0176, quirk_ddi_a_force_4_lanes }, }; static struct intel_dpcd_quirk intel_dpcd_quirks[] = { diff --git a/drivers/gpu/drm/i915/display/intel_quirks.h b/drivers/gpu/drm/i915/display/intel_quirks.h index 151c8f4ae..46e7feba8 100644 --- a/drivers/gpu/drm/i915/display/intel_quirks.h +++ b/drivers/gpu/drm/i915/display/intel_quirks.h @@ -17,6 +17,7 @@ enum intel_quirk_id { QUIRK_LVDS_SSC_DISABLE, QUIRK_NO_PPS_BACKLIGHT_POWER_HOOK, QUIRK_FW_SYNC_LEN, + QUIRK_DDI_A_FORCE_4_LANES, }; void intel_init_quirks(struct intel_display *display); -- 2.45.2