[Intel-gfx] [PATCH 14/18] drm/i915/adl_s: MCHBAR memory info registers are moved

[Aditya Swarup]

From: "Yokoyama, Caz" <caz.yokoyama at intel.com>

The crwebview indicates on ADL-S that some of our MCHBAR
registers have moved from their traditional 0x50XX offsets to
new locations. The meaning and bit layout of the registers
remain same.

Cc: Lucas De Marchi <lucas.demarchi at intel.com>
Cc: Jani Nikula <jani.nikula at intel.com>
Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
Cc: Imre Deak <imre.deak at intel.com>
Cc: Matt Roper <matthew.d.roper at intel.com>
Signed-off-by: Yokoyama, Caz <caz.yokoyama at intel.com>
Signed-off-by: Aditya Swarup <aditya.swarup at intel.com>
---
 drivers/gpu/drm/i915/i915_reg.h   |  5 +++++
 drivers/gpu/drm/i915/intel_dram.c | 18 +++++++++++++++---
 2 files changed, 20 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 267e6602a05b..067e3710d38d 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -10836,6 +10836,8 @@ enum skl_power_gate {
 #define  SKL_DRAM_DDR_TYPE_LPDDR3		(2 << 0)
 #define  SKL_DRAM_DDR_TYPE_LPDDR4		(3 << 0)
 
+#define  ADLS_MAD_INTER_CHANNEL_0_0_0_MCHBAR _MMIO(MCHBAR_MIRROR_BASE_SNB + 0x6048)
+
 #define SKL_MAD_DIMM_CH0_0_0_0_MCHBAR_MCMAIN	_MMIO(MCHBAR_MIRROR_BASE_SNB + 0x500C)
 #define SKL_MAD_DIMM_CH1_0_0_0_MCHBAR_MCMAIN	_MMIO(MCHBAR_MIRROR_BASE_SNB + 0x5010)
 #define  SKL_DRAM_S_SHIFT			16
@@ -10863,6 +10865,9 @@ enum skl_power_gate {
 #define  CNL_DRAM_RANK_3			(0x2 << 9)
 #define  CNL_DRAM_RANK_4			(0x3 << 9)
 
+#define ADLS_MAD_DIMM_CH0_0_0_0_MCHBAR		_MMIO(MCHBAR_MIRROR_BASE_SNB + 0x6054)
+#define ADLS_MAD_DIMM_CH1_0_0_0_MCHBAR		_MMIO(MCHBAR_MIRROR_BASE_SNB + 0x6058)
+
 /* Please see hsw_read_dcomp() and hsw_write_dcomp() before using this register,
  * since on HSW we can't write to it using I915_WRITE. */
 #define D_COMP_HSW			_MMIO(MCHBAR_MIRROR_BASE_SNB + 0x5F0C)
diff --git a/drivers/gpu/drm/i915/intel_dram.c b/drivers/gpu/drm/i915/intel_dram.c
index 4754296a250e..e7427e5f4130 100644
--- a/drivers/gpu/drm/i915/intel_dram.c
+++ b/drivers/gpu/drm/i915/intel_dram.c
@@ -184,13 +184,21 @@ skl_dram_get_channels_info(struct drm_i915_private *i915)
 	u32 val;
 	int ret;
 
-	val = intel_uncore_read(&i915->uncore,
+	if (IS_ALDERLAKE_S(i915))
+		val = intel_uncore_read(&i915->uncore,
+				ADLS_MAD_DIMM_CH0_0_0_0_MCHBAR);
+	else
+		val = intel_uncore_read(&i915->uncore,
 				SKL_MAD_DIMM_CH0_0_0_0_MCHBAR_MCMAIN);
 	ret = skl_dram_get_channel_info(i915, &ch0, 0, val);
 	if (ret == 0)
 		dram_info->num_channels++;
 
-	val = intel_uncore_read(&i915->uncore,
+	if (IS_ALDERLAKE_S(i915))
+		val = intel_uncore_read(&i915->uncore,
+				ADLS_MAD_DIMM_CH1_0_0_0_MCHBAR);
+	else
+		val = intel_uncore_read(&i915->uncore,
 				SKL_MAD_DIMM_CH1_0_0_0_MCHBAR_MCMAIN);
 	ret = skl_dram_get_channel_info(i915, &ch1, 1, val);
 	if (ret == 0)
@@ -231,7 +239,11 @@ skl_get_dram_type(struct drm_i915_private *i915)
 {
 	u32 val;
 
-	val = intel_uncore_read(&i915->uncore,
+	if (IS_ALDERLAKE_S(i915))
+		val = intel_uncore_read(&i915->uncore,
+				ADLS_MAD_INTER_CHANNEL_0_0_0_MCHBAR);
+	else
+		val = intel_uncore_read(&i915->uncore,
 				SKL_MAD_INTER_CHANNEL_0_0_0_MCHBAR_MCMAIN);
 
 	switch (val & SKL_DRAM_DDR_TYPE_MASK) {
-- 
2.27.0