[Intel-gfx] [PATCH 06/15] drm/i915/dsb: Update i915_write to call dsb-write.

[Animesh Manna]

Existing mmio-reg-write need intel_uncore handle which is part
of dev_priv structure and the same design is followed by
adding dsb handle in dev_priv for programming registers through DSB.

I915_WRITE is modified to check for register capability and call
dsb-reg-write based on its capability.

No changes in I915_READ definition as DSB do not have support to
read any register.

Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
Cc: Jani Nikula <jani.nikula at intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
Signed-off-by: Animesh Manna <animesh.manna at intel.com>
---
 drivers/gpu/drm/i915/i915_drv.h  | 6 +++++-
 drivers/gpu/drm/i915/intel_dsb.c | 2 +-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 237c17427780..cd0ebc62fa92 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1880,6 +1880,8 @@ struct drm_i915_private {
 	/* Mutex to protect the above hdcp component related values. */
 	struct mutex hdcp_comp_mutex;
 
+	struct intel_dsb *dsb;
+
 	/*
 	 * NOTE: This is the dri1/ums dungeon, don't add stuff here. Your patch
 	 * will be rejected. Instead look for a better place.
@@ -2716,7 +2718,9 @@ extern void intel_display_print_error_state(struct drm_i915_error_state_buf *e,
 	intel_uncore_##op__(&(dev_priv__)->uncore, __VA_ARGS__)
 
 #define I915_READ(reg__)	 __I915_REG_OP(read, dev_priv, (reg__))
-#define I915_WRITE(reg__, val__) __I915_REG_OP(write, dev_priv, (reg__), (val__))
+#define I915_WRITE(reg__, val__) \
+	(reg__.cap) ? intel_dsb_reg_write(dev_priv->dsb, (reg__), (val__)) : \
+	__I915_REG_OP(write, dev_priv, (reg__), (val__))
 
 #define POSTING_READ(reg__)	__I915_REG_OP(posting_read, dev_priv, (reg__))
 
diff --git a/drivers/gpu/drm/i915/intel_dsb.c b/drivers/gpu/drm/i915/intel_dsb.c
index 31e1093977b6..aa5361c2d70e 100644
--- a/drivers/gpu/drm/i915/intel_dsb.c
+++ b/drivers/gpu/drm/i915/intel_dsb.c
@@ -122,7 +122,7 @@ void intel_dsb_reg_write(struct intel_dsb *dsb, i915_reg_t reg, u32 val)
 	u32 *buf = dsb->cmd_buf;
 
 	if (!buf) {
-		I915_WRITE(reg, val);
+		intel_uncore_write(&(dev_priv)->uncore, reg, val);
 		return;
 	}
 
-- 
2.21.0