Add some preliminary definitions like, output type and transcoder
related to the writeback functionality.

Signed-off-by: Suraj Kandpal <suraj.kand...@intel.com>

diff --git a/drivers/gpu/drm/i915/display/intel_display.h 
b/drivers/gpu/drm/i915/display/intel_display.h
index 3b54a62c290a..ae474cbeb791 100644
--- a/drivers/gpu/drm/i915/display/intel_display.h
+++ b/drivers/gpu/drm/i915/display/intel_display.h
@@ -82,6 +82,10 @@ static inline const char *transcoder_name(enum transcoder 
transcoder)
                return "DSI A";
        case TRANSCODER_DSI_C:
                return "DSI C";
+       case TRANSCODER_WD_0:
+               return "WD 0";
+       case TRANSCODER_WD_1:
+               return "WD 1";
        default:
                return "<invalid>";
        }
diff --git a/drivers/gpu/drm/i915/display/intel_display_device.c 
b/drivers/gpu/drm/i915/display/intel_display_device.c
index 90d714598664..2b187472e752 100644
--- a/drivers/gpu/drm/i915/display/intel_display_device.c
+++ b/drivers/gpu/drm/i915/display/intel_display_device.c
@@ -21,6 +21,7 @@
 #include "intel_display_types.h"
 #include "intel_fbc.h"
 #include "intel_step.h"
+#include "intel_writeback_reg.h"
 
 __diag_push();
 __diag_ignore_all("-Woverride-init", "Allow field initialization overrides for 
display info");
@@ -144,12 +145,16 @@ static const struct intel_display_device_info no_display 
= {};
                [TRANSCODER_B] = PIPE_B_OFFSET, \
                [TRANSCODER_C] = PIPE_C_OFFSET, \
                [TRANSCODER_EDP] = PIPE_EDP_OFFSET, \
+               [TRANSCODER_WD_0] = PIPE_WD0_OFFSET, \
+               [TRANSCODER_WD_1] = PIPE_WD1_OFFSET, \
        }, \
        .trans_offsets = { \
                [TRANSCODER_A] = TRANSCODER_A_OFFSET, \
                [TRANSCODER_B] = TRANSCODER_B_OFFSET, \
                [TRANSCODER_C] = TRANSCODER_C_OFFSET, \
                [TRANSCODER_EDP] = TRANSCODER_EDP_OFFSET, \
+               [TRANSCODER_WD_0] = TRANSCODER_WD0_OFFSET, \
+               [TRANSCODER_WD_1] = TRANSCODER_WD1_OFFSET, \
        }
 
 #define CHV_PIPE_OFFSETS \
@@ -677,7 +682,8 @@ static const struct intel_display_device_info skl_display = 
{
        .__runtime_defaults.pipe_mask = BIT(PIPE_A) | BIT(PIPE_B) | BIT(PIPE_C),
        .__runtime_defaults.cpu_transcoder_mask =
        BIT(TRANSCODER_A) | BIT(TRANSCODER_B) |
-       BIT(TRANSCODER_C) | BIT(TRANSCODER_EDP),
+       BIT(TRANSCODER_C) | BIT(TRANSCODER_EDP) |
+       BIT(TRANSCODER_WD_0) | BIT(TRANSCODER_WD_1),
        .__runtime_defaults.port_mask = BIT(PORT_A) | BIT(PORT_B) | BIT(PORT_C) 
| BIT(PORT_D) | BIT(PORT_E),
        .__runtime_defaults.fbc_mask = BIT(INTEL_FBC_A),
 };
@@ -829,6 +835,7 @@ static const struct platform_desc cml_desc = {
                BIT(TRANSCODER_A) | BIT(TRANSCODER_B) | \
                BIT(TRANSCODER_C) | BIT(TRANSCODER_EDP) | \
                BIT(TRANSCODER_DSI_A) | BIT(TRANSCODER_DSI_C), \
+               BIT(TRANSCODER_WD_0) | BIT(TRANSCODER_WD_0), \
        .__runtime_defaults.port_mask = BIT(PORT_A) | BIT(PORT_B) | BIT(PORT_C)
 
 static const enum intel_step bxt_steppings[] = {
@@ -883,6 +890,8 @@ static const struct platform_desc glk_desc = {
                [TRANSCODER_EDP] = PIPE_EDP_OFFSET, \
                [TRANSCODER_DSI_0] = PIPE_DSI0_OFFSET, \
                [TRANSCODER_DSI_1] = PIPE_DSI1_OFFSET, \
+               [TRANSCODER_WD_0] = PIPE_WD0_OFFSET, \
+               [TRANSCODER_WD_1] = PIPE_WD1_OFFSET, \
        }, \
        .trans_offsets = { \
                [TRANSCODER_A] = TRANSCODER_A_OFFSET, \
@@ -891,6 +900,8 @@ static const struct platform_desc glk_desc = {
                [TRANSCODER_EDP] = TRANSCODER_EDP_OFFSET, \
                [TRANSCODER_DSI_0] = TRANSCODER_DSI0_OFFSET, \
                [TRANSCODER_DSI_1] = TRANSCODER_DSI1_OFFSET, \
+               [TRANSCODER_WD_0] = TRANSCODER_WD0_OFFSET, \
+               [TRANSCODER_WD_1] = TRANSCODER_WD1_OFFSET, \
        }, \
        IVB_CURSOR_OFFSETS, \
        ICL_COLORS, \
@@ -904,6 +915,7 @@ static const struct platform_desc glk_desc = {
                BIT(TRANSCODER_A) | BIT(TRANSCODER_B) | \
                BIT(TRANSCODER_C) | BIT(TRANSCODER_EDP) | \
                BIT(TRANSCODER_DSI_0) | BIT(TRANSCODER_DSI_1), \
+               BIT(TRANSCODER_WD_0) | BIT(TRANSCODER_WD_1), \
        .__runtime_defaults.fbc_mask = BIT(INTEL_FBC_A)
 
 static const u16 icl_port_f_ids[] = {
@@ -974,6 +986,8 @@ static const struct platform_desc ehl_desc = {
                [TRANSCODER_D] = PIPE_D_OFFSET, \
                [TRANSCODER_DSI_0] = PIPE_DSI0_OFFSET, \
                [TRANSCODER_DSI_1] = PIPE_DSI1_OFFSET, \
+               [TRANSCODER_WD_0] = PIPE_WD0_OFFSET, \
+               [TRANSCODER_WD_1] = PIPE_WD1_OFFSET, \
        }, \
        .trans_offsets = { \
                [TRANSCODER_A] = TRANSCODER_A_OFFSET, \
@@ -982,6 +996,8 @@ static const struct platform_desc ehl_desc = {
                [TRANSCODER_D] = TRANSCODER_D_OFFSET, \
                [TRANSCODER_DSI_0] = TRANSCODER_DSI0_OFFSET, \
                [TRANSCODER_DSI_1] = TRANSCODER_DSI1_OFFSET, \
+               [TRANSCODER_WD_0] = TRANSCODER_WD0_OFFSET, \
+               [TRANSCODER_WD_1] = TRANSCODER_WD1_OFFSET, \
        }, \
        TGL_CURSOR_OFFSETS, \
        ICL_COLORS, \
@@ -996,6 +1012,7 @@ static const struct platform_desc ehl_desc = {
                BIT(TRANSCODER_A) | BIT(TRANSCODER_B) | \
                BIT(TRANSCODER_C) | BIT(TRANSCODER_D) | \
                BIT(TRANSCODER_DSI_0) | BIT(TRANSCODER_DSI_1), \
+               BIT(TRANSCODER_WD_0) | BIT(TRANSCODER_WD_1), \
        .__runtime_defaults.fbc_mask = BIT(INTEL_FBC_A)
 
 static const u16 tgl_uy_ids[] = {
@@ -1141,6 +1158,8 @@ static const struct platform_desc adl_s_desc = {
                [TRANSCODER_D] = PIPE_D_OFFSET,                                 
\
                [TRANSCODER_DSI_0] = PIPE_DSI0_OFFSET,                          
\
                [TRANSCODER_DSI_1] = PIPE_DSI1_OFFSET,                          
\
+               [TRANSCODER_WD_0] = PIPE_WD0_OFFSET, \
+               [TRANSCODER_WD_1] = PIPE_WD1_OFFSET, \
        },                                                                      
\
        .trans_offsets = {                                                      
\
                [TRANSCODER_A] = TRANSCODER_A_OFFSET,                           
\
@@ -1149,6 +1168,8 @@ static const struct platform_desc adl_s_desc = {
                [TRANSCODER_D] = TRANSCODER_D_OFFSET,                           
\
                [TRANSCODER_DSI_0] = TRANSCODER_DSI0_OFFSET,                    
\
                [TRANSCODER_DSI_1] = TRANSCODER_DSI1_OFFSET,                    
\
+               [TRANSCODER_WD_0] = TRANSCODER_WD0_OFFSET, \
+               [TRANSCODER_WD_1] = TRANSCODER_WD1_OFFSET, \
        },                                                                      
\
        TGL_CURSOR_OFFSETS,                                                     
\
                                                                                
\
@@ -1168,7 +1189,8 @@ static const struct intel_display_device_info 
xe_lpd_display = {
        .__runtime_defaults.cpu_transcoder_mask =
                BIT(TRANSCODER_A) | BIT(TRANSCODER_B) |
                BIT(TRANSCODER_C) | BIT(TRANSCODER_D) |
-               BIT(TRANSCODER_DSI_0) | BIT(TRANSCODER_DSI_1),
+               BIT(TRANSCODER_DSI_0) | BIT(TRANSCODER_DSI_1) |
+               BIT(TRANSCODER_WD_0) | BIT(TRANSCODER_WD_1),
        .__runtime_defaults.port_mask = BIT(PORT_A) | BIT(PORT_B) |
                BIT(PORT_TC1) | BIT(PORT_TC2) | BIT(PORT_TC3) | BIT(PORT_TC4),
 };
diff --git a/drivers/gpu/drm/i915/display/intel_display_device.h 
b/drivers/gpu/drm/i915/display/intel_display_device.h
index 87c666792c0d..0f023826287a 100644
--- a/drivers/gpu/drm/i915/display/intel_display_device.h
+++ b/drivers/gpu/drm/i915/display/intel_display_device.h
@@ -259,7 +259,7 @@ struct intel_display_runtime_info {
        u32 rawclk_freq;
 
        u8 pipe_mask;
-       u8 cpu_transcoder_mask;
+       u16 cpu_transcoder_mask;
        u16 port_mask;
 
        u8 num_sprites[I915_MAX_PIPES];
diff --git a/drivers/gpu/drm/i915/display/intel_display_limits.h 
b/drivers/gpu/drm/i915/display/intel_display_limits.h
index f0fa27e365ab..67978c1b71ad 100644
--- a/drivers/gpu/drm/i915/display/intel_display_limits.h
+++ b/drivers/gpu/drm/i915/display/intel_display_limits.h
@@ -45,6 +45,8 @@ enum transcoder {
        TRANSCODER_DSI_1,
        TRANSCODER_DSI_A = TRANSCODER_DSI_0,    /* legacy DSI */
        TRANSCODER_DSI_C = TRANSCODER_DSI_1,    /* legacy DSI */
+       TRANSCODER_WD_0,
+       TRANSCODER_WD_1,
 
        I915_MAX_TRANSCODERS
 };
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h 
b/drivers/gpu/drm/i915/display/intel_display_types.h
index d6d0440dcee9..24e682d45b1b 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -79,6 +79,7 @@ enum intel_output_type {
        INTEL_OUTPUT_DSI = 9,
        INTEL_OUTPUT_DDI = 10,
        INTEL_OUTPUT_DP_MST = 11,
+       INTEL_OUTPUT_WRITEBACK = 12,
 };
 
 enum hdmi_force_audio {
-- 
2.34.1

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