From fb7318c37afac6c6c7d18f893b3df962388cf763 Mon Sep 17 00:00:00 2001 From: Lucas De Marchi Date: Tue, 6 Oct 2020 17:22:07 -0700 Subject: [PATCH] drm/i915/dg1: gmbus pin mapping Add tables to map the GMBUS pin pairs to GPIO registers and port to DDC. From spec we have registers GPIO_CTL[1-4], so we should not do the 4->9 mapping as in ICL/TGL. The values for VBT seem wrong in BSpec. For the current boards we actually have a 1:1 mapping. BSpec: 49311, 49945, 20124 Cc: Aditya Swarup Cc: Matt Roper Signed-off-by: Lucas De Marchi Reviewed-by: Matt Roper Link: https://patchwork.freedesktop.org/patch/msgid/20201007002210.3678024-5-lucas.demarchi@intel.com --- drivers/gpu/drm/i915/display/intel_bios.c | 4 +++- drivers/gpu/drm/i915/display/intel_gmbus.c | 15 +++++++++++++-- drivers/gpu/drm/i915/display/intel_hdmi.c | 9 ++++++++- 3 files changed, 24 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_bios.c b/drivers/gpu/drm/i915/display/intel_bios.c index 4716484..23bf21e 100644 --- a/drivers/gpu/drm/i915/display/intel_bios.c +++ b/drivers/gpu/drm/i915/display/intel_bios.c @@ -1602,7 +1602,9 @@ static u8 map_ddc_pin(struct drm_i915_private *dev_priv, u8 vbt_pin) const u8 *ddc_pin_map; int n_entries; - if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP) { + if (INTEL_PCH_TYPE(dev_priv) >= PCH_DG1) { + return vbt_pin; + } else if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP) { ddc_pin_map = icp_ddc_pin_map; n_entries = ARRAY_SIZE(icp_ddc_pin_map); } else if (HAS_PCH_CNP(dev_priv)) { diff --git a/drivers/gpu/drm/i915/display/intel_gmbus.c b/drivers/gpu/drm/i915/display/intel_gmbus.c index e6b8d6d..b0d71bb 100644 --- a/drivers/gpu/drm/i915/display/intel_gmbus.c +++ b/drivers/gpu/drm/i915/display/intel_gmbus.c @@ -90,11 +90,20 @@ static const struct gmbus_pin gmbus_pins_icp[] = { [GMBUS_PIN_14_TC6_TGP] = { "tc6", GPIOO }, }; +static const struct gmbus_pin gmbus_pins_dg1[] = { + [GMBUS_PIN_1_BXT] = { "dpa", GPIOB }, + [GMBUS_PIN_2_BXT] = { "dpb", GPIOC }, + [GMBUS_PIN_3_BXT] = { "dpc", GPIOD }, + [GMBUS_PIN_4_CNP] = { "dpd", GPIOE }, +}; + /* pin is expected to be valid */ static const struct gmbus_pin *get_gmbus_pin(struct drm_i915_private *dev_priv, unsigned int pin) { - if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP) + if (INTEL_PCH_TYPE(dev_priv) >= PCH_DG1) + return &gmbus_pins_dg1[pin]; + else if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP) return &gmbus_pins_icp[pin]; else if (HAS_PCH_CNP(dev_priv)) return &gmbus_pins_cnp[pin]; @@ -113,7 +122,9 @@ bool intel_gmbus_is_valid_pin(struct drm_i915_private *dev_priv, { unsigned int size; - if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP) + if (INTEL_PCH_TYPE(dev_priv) >= PCH_DG1) + size = ARRAY_SIZE(gmbus_pins_dg1); + else if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP) size = ARRAY_SIZE(gmbus_pins_icp); else if (HAS_PCH_CNP(dev_priv)) size = ARRAY_SIZE(gmbus_pins_cnp); diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c b/drivers/gpu/drm/i915/display/intel_hdmi.c index 8051df3..f90838b 100644 --- a/drivers/gpu/drm/i915/display/intel_hdmi.c +++ b/drivers/gpu/drm/i915/display/intel_hdmi.c @@ -3140,6 +3140,11 @@ static u8 rkl_port_to_ddc_pin(struct drm_i915_private *dev_priv, enum port port) return GMBUS_PIN_1_BXT + phy; } +static u8 dg1_port_to_ddc_pin(struct drm_i915_private *dev_priv, enum port port) +{ + return intel_port_to_phy(dev_priv, port) + 1; +} + static u8 g4x_port_to_ddc_pin(struct drm_i915_private *dev_priv, enum port port) { @@ -3177,7 +3182,9 @@ static u8 intel_hdmi_ddc_pin(struct intel_encoder *encoder) return ddc_pin; } - if (IS_ROCKETLAKE(dev_priv)) + if (INTEL_PCH_TYPE(dev_priv) >= PCH_DG1) + ddc_pin = dg1_port_to_ddc_pin(dev_priv, port); + else if (IS_ROCKETLAKE(dev_priv)) ddc_pin = rkl_port_to_ddc_pin(dev_priv, port); else if (HAS_PCH_MCC(dev_priv)) ddc_pin = mcc_port_to_ddc_pin(dev_priv, port); -- 2.7.4