drm/etnaviv: add further minor features and varyings count

Export further minor feature bitmasks and the varyings count from
the GPU specifications registers to userspace.

Acked-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>

3 files changed, 73 insertions, 1 deletions

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
index d5fad472e91f..7b511ad9f54b 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
@@ -72,6 +72,14 @@ int etnaviv_gpu_get_param(struct etnaviv_gpu *gpu, u32 param, u64 *value)
                 *value = gpu->identity.minor_features3;
                 break;
 
+        case ETNAVIV_PARAM_GPU_FEATURES_5:
+                *value = gpu->identity.minor_features4;
+                break;
+
+        case ETNAVIV_PARAM_GPU_FEATURES_6:
+                *value = gpu->identity.minor_features5;
+                break;
+
         case ETNAVIV_PARAM_GPU_STREAM_COUNT:
                 *value = gpu->identity.stream_count;
                 break;
@@ -112,6 +120,10 @@ int etnaviv_gpu_get_param(struct etnaviv_gpu *gpu, u32 param, u64 *value)
                 *value = gpu->identity.num_constants;
                 break;
 
+        case ETNAVIV_PARAM_GPU_NUM_VARYINGS:
+                *value = gpu->identity.varyings_count;
+                break;
+
         default:
                 DBG("%s: invalid param: %u", dev_name(gpu->dev), param);
                 return -EINVAL;
@@ -131,10 +143,13 @@ static void etnaviv_hw_specs(struct etnaviv_gpu *gpu)
 {
         if (gpu->identity.minor_features0 &
             chipMinorFeatures0_MORE_MINOR_FEATURES) {
-                u32 specs[2];
+                u32 specs[4];
+                unsigned int streams;
 
                 specs[0] = gpu_read(gpu, VIVS_HI_CHIP_SPECS);
                 specs[1] = gpu_read(gpu, VIVS_HI_CHIP_SPECS_2);
+                specs[2] = gpu_read(gpu, VIVS_HI_CHIP_SPECS_3);
+                specs[3] = gpu_read(gpu, VIVS_HI_CHIP_SPECS_4);
 
                 gpu->identity.stream_count = etnaviv_field(specs[0],
                                         VIVS_HI_CHIP_SPECS_STREAM_COUNT);
@@ -158,6 +173,15 @@ static void etnaviv_hw_specs(struct etnaviv_gpu *gpu)
                                         VIVS_HI_CHIP_SPECS_2_INSTRUCTION_COUNT);
                 gpu->identity.num_constants = etnaviv_field(specs[1],
                                         VIVS_HI_CHIP_SPECS_2_NUM_CONSTANTS);
+
+                gpu->identity.varyings_count = etnaviv_field(specs[2],
+                                        VIVS_HI_CHIP_SPECS_3_VARYINGS_COUNT);
+
+                /* This overrides the value from older register if non-zero */
+                streams = etnaviv_field(specs[3],
+                                        VIVS_HI_CHIP_SPECS_4_STREAM_COUNT);
+                if (streams)
+                        gpu->identity.stream_count = streams;
         }
 
         /* Fill in the stream count if not specified */
@@ -239,6 +263,30 @@ static void etnaviv_hw_specs(struct etnaviv_gpu *gpu)
 
         if (gpu->identity.num_constants == 0)
                 gpu->identity.num_constants = 168;
+
+        if (gpu->identity.varyings_count == 0) {
+                if (gpu->identity.minor_features1 & chipMinorFeatures1_HALTI0)
+                        gpu->identity.varyings_count = 12;
+                else
+                        gpu->identity.varyings_count = 8;
+        }
+
+        /*
+         * For some cores, two varyings are consumed for position, so the
+         * maximum varying count needs to be reduced by one.
+         */
+        if (etnaviv_is_model_rev(gpu, GC5000, 0x5434) ||
+            etnaviv_is_model_rev(gpu, GC4000, 0x5222) ||
+            etnaviv_is_model_rev(gpu, GC4000, 0x5245) ||
+            etnaviv_is_model_rev(gpu, GC4000, 0x5208) ||
+            etnaviv_is_model_rev(gpu, GC3000, 0x5435) ||
+            etnaviv_is_model_rev(gpu, GC2200, 0x5244) ||
+            etnaviv_is_model_rev(gpu, GC2100, 0x5108) ||
+            etnaviv_is_model_rev(gpu, GC2000, 0x5108) ||
+            etnaviv_is_model_rev(gpu, GC1500, 0x5246) ||
+            etnaviv_is_model_rev(gpu, GC880, 0x5107) ||
+            etnaviv_is_model_rev(gpu, GC880, 0x5106))
+                gpu->identity.varyings_count -= 1;
 }
 
 static void etnaviv_hw_identify(struct etnaviv_gpu *gpu)
@@ -305,6 +353,8 @@ static void etnaviv_hw_identify(struct etnaviv_gpu *gpu)
                 gpu->identity.minor_features1 = 0;
                 gpu->identity.minor_features2 = 0;
                 gpu->identity.minor_features3 = 0;
+                gpu->identity.minor_features4 = 0;
+                gpu->identity.minor_features5 = 0;
         } else
                 gpu->identity.minor_features0 =
                                 gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_0);
@@ -317,6 +367,10 @@ static void etnaviv_hw_identify(struct etnaviv_gpu *gpu)
                                 gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_2);
                 gpu->identity.minor_features3 =
                                 gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_3);
+                gpu->identity.minor_features4 =
+                                gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_4);
+                gpu->identity.minor_features5 =
+                                gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_5);
         }
 
         /* GC600 idle register reports zero bits where modules aren't present */
@@ -645,6 +699,10 @@ int etnaviv_gpu_debugfs(struct etnaviv_gpu *gpu, struct seq_file *m)
                    gpu->identity.minor_features2);
         seq_printf(m, "\t minor_features3: 0x%08x\n",
                    gpu->identity.minor_features3);
+        seq_printf(m, "\t minor_features4: 0x%08x\n",
+                   gpu->identity.minor_features4);
+        seq_printf(m, "\t minor_features5: 0x%08x\n",
+                   gpu->identity.minor_features5);
 
         seq_puts(m, "\tspecs\n");
         seq_printf(m, "\t stream_count:  %d\n",
@@ -667,6 +725,8 @@ int etnaviv_gpu_debugfs(struct etnaviv_gpu *gpu, struct seq_file *m)
                         gpu->identity.instruction_count);
         seq_printf(m, "\t num_constants: %d\n",
                         gpu->identity.num_constants);
+        seq_printf(m, "\t varyings_count: %d\n",
+                        gpu->identity.varyings_count);
 
         seq_printf(m, "\taxi: 0x%08x\n", axi);
         seq_printf(m, "\tidle: 0x%08x\n", idle);
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.h b/drivers/gpu/drm/etnaviv/etnaviv_gpu.h
index c75d50359ab0..f233ac4c7c1c 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.h
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.h
@@ -46,6 +46,12 @@ struct etnaviv_chip_identity {
         /* Supported minor feature 3 fields. */
         u32 minor_features3;
 
+        /* Supported minor feature 4 fields. */
+        u32 minor_features4;
+
+        /* Supported minor feature 5 fields. */
+        u32 minor_features5;
+
         /* Number of streams supported. */
         u32 stream_count;
 
@@ -75,6 +81,9 @@ struct etnaviv_chip_identity {
 
         /* Buffer size */
         u32 buffer_size;
+
+        /* Number of varyings */
+        u8 varyings_count;
 };
 
 struct etnaviv_event {
diff --git a/include/uapi/drm/etnaviv_drm.h b/include/uapi/drm/etnaviv_drm.h
index 4cc989ad6851..f95e1c43c3fb 100644
--- a/include/uapi/drm/etnaviv_drm.h
+++ b/include/uapi/drm/etnaviv_drm.h
@@ -48,6 +48,8 @@ struct drm_etnaviv_timespec {
 #define ETNAVIV_PARAM_GPU_FEATURES_2                0x05
 #define ETNAVIV_PARAM_GPU_FEATURES_3                0x06
 #define ETNAVIV_PARAM_GPU_FEATURES_4                0x07
+#define ETNAVIV_PARAM_GPU_FEATURES_5                0x08