[Intel-gfx] [PATCH v2] drm/i915/rkl: new rkl ddc map for different PCH

[Lee Shawn C]

After boot into kernel. Driver configured ddc pin mapping based on
predefined table in parse_ddi_port(). Now driver configure rkl
ddc pin mapping depends on icp_ddc_pin_map[]. Then this table will
give incorrect gmbus port number to cause HDMI can't work.

Refer to commit d0a89527d06 ("drm/i915/rkl: Add DDC pin mapping").
Create two ddc pin table for rkl TGP and CMP pch. Then HDMI can
works properly on rkl.

v2: update patch based on latest dinq branch.

Cc: Matt Roper <matthew.d.roper at intel.com>
Cc: Aditya Swarup <aditya.swarup at intel.com>
Cc: Anusha Srivatsa <anusha.srivatsa at intel.com>
Cc: Jani Nikula <jani.nikula at linux.intel.com>
Cc: Cooper Chiou <cooper.chiou at intel.com>
Cc: Khaled Almahallawy <khaled.almahallawy at intel.com>
Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/2577
Signed-off-by: Lee Shawn C <shawn.c.lee at intel.com>
---
 drivers/gpu/drm/i915/display/intel_bios.c     | 20 +++++++++++++++++++
 drivers/gpu/drm/i915/display/intel_vbt_defs.h |  4 ++++
 2 files changed, 24 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_bios.c b/drivers/gpu/drm/i915/display/intel_bios.c
index 0a309645fe06..ca9426e1768a 100644
--- a/drivers/gpu/drm/i915/display/intel_bios.c
+++ b/drivers/gpu/drm/i915/display/intel_bios.c
@@ -1623,6 +1623,18 @@ static const u8 icp_ddc_pin_map[] = {
 	[TGL_DDC_BUS_PORT_6] = GMBUS_PIN_14_TC6_TGP,
 };
 
+static const u8 rkl_pch_tgp_ddc_pin_map[] = {
+	[RKL_DDC_BUS_DDI_B] = GMBUS_PIN_2_BXT,
+	[RKL_DDC_BUS_DDI_D] = GMBUS_PIN_9_TC1_ICP,
+	[RKL_DDC_BUS_DDI_E] = GMBUS_PIN_10_TC2_ICP,
+};
+
+static const u8 rkl_pch_cmp_ddc_pin_map[] = {
+	[RKL_DDC_BUS_DDI_B] = GMBUS_PIN_2_BXT,
+	[RKL_DDC_BUS_DDI_D] = GMBUS_PIN_3_BXT,
+	[RKL_DDC_BUS_DDI_E] = GMBUS_PIN_4_CNP,
+};
+
 static u8 map_ddc_pin(struct drm_i915_private *dev_priv, u8 vbt_pin)
 {
 	const u8 *ddc_pin_map;
@@ -1630,6 +1642,14 @@ static u8 map_ddc_pin(struct drm_i915_private *dev_priv, u8 vbt_pin)
 
 	if (INTEL_PCH_TYPE(dev_priv) >= PCH_DG1) {
 		return vbt_pin;
+	} else if (IS_ROCKETLAKE(dev_priv)) {
+		if (INTEL_PCH_TYPE(dev_priv) >= PCH_TGP) {
+			ddc_pin_map = rkl_pch_tgp_ddc_pin_map;
+			n_entries = ARRAY_SIZE(rkl_pch_tgp_ddc_pin_map);
+		} else {
+			ddc_pin_map = rkl_pch_cmp_ddc_pin_map;
+			n_entries = ARRAY_SIZE(rkl_pch_cmp_ddc_pin_map);
+		}
 	} else if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP) {
 		ddc_pin_map = icp_ddc_pin_map;
 		n_entries = ARRAY_SIZE(icp_ddc_pin_map);
diff --git a/drivers/gpu/drm/i915/display/intel_vbt_defs.h b/drivers/gpu/drm/i915/display/intel_vbt_defs.h
index 49b4b5fca941..2df009996128 100644
--- a/drivers/gpu/drm/i915/display/intel_vbt_defs.h
+++ b/drivers/gpu/drm/i915/display/intel_vbt_defs.h
@@ -319,6 +319,10 @@ enum vbt_gmbus_ddi {
 	ICL_DDC_BUS_DDI_A = 0x1,
 	ICL_DDC_BUS_DDI_B,
 	TGL_DDC_BUS_DDI_C,
+	RKL_DDC_BUS_DDI_B = 0x1,
+	RKL_DDC_BUS_DDI_C,
+	RKL_DDC_BUS_DDI_D,
+	RKL_DDC_BUS_DDI_E,
 	ICL_DDC_BUS_PORT_1 = 0x4,
 	ICL_DDC_BUS_PORT_2,
 	ICL_DDC_BUS_PORT_3,
-- 
2.28.0