Re: [PATCH 1/3] drm/i915/cnl; Add macro to get PORT_TX register

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Hi,


On 3/10/2018 2:21 AM, Lucas De Marchi wrote:
On Fri, Mar 09, 2018 at 11:55:47AM -0800, Rodrigo Vivi wrote:
On Fri, Mar 09, 2018 at 06:28:56PM +0530, Mahesh Kumar wrote:
This patch creates a new macro to get PORT_TX register for any given DW.
This will remove the need of defining register address for each port & DW.
please squash patches 1 and 2. I had to open both simultaneously to review it
what indicates that they should be 1 patch.
ok, will merge.

Signed-off-by: Mahesh Kumar <mahesh1.kumar@xxxxxxxxx>
---
  drivers/gpu/drm/i915/i915_reg.h | 28 ++++++++++++++++++++++++++++
  1 file changed, 28 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index e6a8c0ee7df1..30ef3513dc6f 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -1964,6 +1964,34 @@ enum i915_power_well_id {
  						    _CNL_PORT_PCS_DW1_LN0_F)
  #define   COMMON_KEEPER_EN		(1 << 26)
+/* CNL Port TX registers */
+#define _CNL_PORT_TX_AE_GRP_OFFSET		0x162340
+#define _CNL_PORT_TX_B_GRP_OFFSET		0x1623C0
+#define _CNL_PORT_TX_C_GRP_OFFSET		0x162B40
+#define _CNL_PORT_TX_D_GRP_OFFSET		0x162BC0
+#define _CNL_PORT_TX_F_GRP_OFFSET		0x162A40
+#define _CNL_PORT_TX_AE_LN0_OFFSET		0x162440
+#define _CNL_PORT_TX_B_LN0_OFFSET		0x162640
+#define _CNL_PORT_TX_C_LN0_OFFSET		0x162C40
+#define _CNL_PORT_TX_D_LN0_OFFSET		0x162E40
+#define _CNL_PORT_TX_F_LN0_OFFSET		0x162840
+#define CNL_PORT_TX_DW_GRP(port, dw)	(_PICK((port), \
+					       _CNL_PORT_TX_AE_GRP_OFFSET, \
+					       _CNL_PORT_TX_B_GRP_OFFSET, \
+					       _CNL_PORT_TX_B_GRP_OFFSET, \
+					       _CNL_PORT_TX_D_GRP_OFFSET, \
+					       _CNL_PORT_TX_AE_GRP_OFFSET, \
+					       _CNL_PORT_TX_F_GRP_OFFSET) + \
+					       4*(dw))
the math is right. I'm glad someone could see some logic on all these
numbers. I with we had a basic offset and math for all the port registers, but...

+#define CNL_PORT_TX_DW_LN0(port, dw)	(_PICK((port), \
who converts the offset to MMIO reg now?
caller of this macro converts it to MMIO reg
I don't think this is supposed to be used outside the header is it?
I think it should have a underscore, because otherwise it's confusing
that CNL_PORT_TX_DW_LN0 returns an offsed and CNL_PORT_TX_DW[0-5]_LN0
return an mmio reg.
hmm, agree, will add underscore to the macros.

And if it's used elsewhere, maybe append _OFFSET to the macro?
this isn't intended to be used outside of header file.
-Mahesh

Lucas De Marchi

+					       _CNL_PORT_TX_AE_LN0_OFFSET, \
+					       _CNL_PORT_TX_B_LN0_OFFSET, \
+					       _CNL_PORT_TX_B_LN0_OFFSET, \
+					       _CNL_PORT_TX_D_LN0_OFFSET, \
+					       _CNL_PORT_TX_AE_LN0_OFFSET, \
+					       _CNL_PORT_TX_F_LN0_OFFSET) + \
+					       4*(dw))
+
  #define _CNL_PORT_TX_DW2_GRP_AE		0x162348
  #define _CNL_PORT_TX_DW2_GRP_B		0x1623C8
  #define _CNL_PORT_TX_DW2_GRP_C		0x162B48
--
2.14.1

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