drm/i915/chv: Populate total EU count on Cherryview

Starting with Cherryview, devices may have a varying number of EU for
a given ID due to creative fusing. Punit support different frequency for
different fuse data. We use this patch to help get total eu enabled and
read the right offset to get RP0

Based upon a patch from Jeff, but reworked to only store eu_total and
avoid sending info to userspace

v2: Format register definitions (Jani)

Signed-off-by: Deepak S <deepak.s@linux.intel.com>
Acked-by: Jeff McGee <jeff.mcgee@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index 2447de3..b868e9d 100644 (file)
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -601,6 +601,17 @@ static void intel_device_info_runtime_init(struct drm_device *dev)
                        info->num_pipes = 0;
                }
        }
+
+       if (IS_CHERRYVIEW(dev)) {
+               u32 fuse, mask_eu;
+
+               fuse = I915_READ(CHV_FUSE_GT);
+               mask_eu = fuse & (CHV_FGT_EU_DIS_SS0_R0_MASK |
+                                 CHV_FGT_EU_DIS_SS0_R1_MASK |
+                                 CHV_FGT_EU_DIS_SS1_R0_MASK |
+                                 CHV_FGT_EU_DIS_SS1_R1_MASK);
+               info->eu_total = 16 - hweight32(mask_eu);
+       }
 }
 
 /**

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index ede4862..100f1ff 100644 (file)
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -653,6 +653,7 @@ struct intel_device_info {
        int trans_offsets[I915_MAX_TRANSCODERS];
        int palette_offsets[I915_MAX_PIPES];
        int cursor_offsets[I915_MAX_PIPES];
+       unsigned int eu_total;
 };
 
 #undef DEFINE_FLAG

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index a39bb03..d9692f9 100644 (file)
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -1471,6 +1471,17 @@ enum punit_power_well {
 #define   GEN8_RC_SEMA_IDLE_MSG_DISABLE        (1 << 12)
 #define   GEN8_FF_DOP_CLOCK_GATE_DISABLE       (1<<10)
 
+/* Fuse readout registers for GT */
+#define CHV_FUSE_GT                    (VLV_DISPLAY_BASE + 0x2168)
+#define   CHV_FGT_EU_DIS_SS0_R0_SHIFT  16
+#define   CHV_FGT_EU_DIS_SS0_R0_MASK   (0xf << CHV_FGT_EU_DIS_SS0_R0_SHIFT)
+#define   CHV_FGT_EU_DIS_SS0_R1_SHIFT  20
+#define   CHV_FGT_EU_DIS_SS0_R1_MASK   (0xf << CHV_FGT_EU_DIS_SS0_R1_SHIFT)
+#define   CHV_FGT_EU_DIS_SS1_R0_SHIFT  24
+#define   CHV_FGT_EU_DIS_SS1_R0_MASK   (0xf << CHV_FGT_EU_DIS_SS1_R0_SHIFT)
+#define   CHV_FGT_EU_DIS_SS1_R1_SHIFT  28
+#define   CHV_FGT_EU_DIS_SS1_R1_MASK   (0xf << CHV_FGT_EU_DIS_SS1_R1_SHIFT)
+
 #define GEN6_BSD_SLEEP_PSMI_CONTROL    0x12050
 #define   GEN6_BSD_SLEEP_MSG_DISABLE   (1 << 0)
 #define   GEN6_BSD_SLEEP_FLUSH_DISABLE (1 << 2)