1 files changed, 33 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/2519-drm-amd-display-add-SW_USE_I2C_REG-request.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/2519-drm-amd-display-add-SW_USE_I2C_REG-request.patch
new file mode 100644
index 00000000..82014633
--- /dev/null
+++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/2519-drm-amd-display-add-SW_USE_I2C_REG-request.patch
@@ -0,0 +1,33 @@
+From 7636da3653e5bbfc9241d99ece3956f7c6667285 Mon Sep 17 00:00:00 2001
+From: Charlene Liu <charlene.liu@amd.com>
+Date: Mon, 15 Apr 2019 16:17:59 -0400
+Subject: [PATCH 2519/2940] drm/amd/display: add SW_USE_I2C_REG request.
+
+[Description]
+This is for DC_I2c arbitration use between HW use/SW use and DMCU use.
+
+Signed-off-by: Charlene Liu <charlene.liu@amd.com>
+Reviewed-by: Krunoslav Kovac <Krunoslav.Kovac@amd.com>
+Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
+Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
+Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
+---
+ drivers/gpu/drm/amd/display/dc/dce/dce_i2c_hw.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_i2c_hw.c b/drivers/gpu/drm/amd/display/dc/dce/dce_i2c_hw.c
+index d658b862430a..b2786a704708 100644
+--- a/drivers/gpu/drm/amd/display/dc/dce/dce_i2c_hw.c
++++ b/drivers/gpu/drm/amd/display/dc/dce/dce_i2c_hw.c
+@@ -306,6 +306,8 @@ static bool setup_engine(
+ #if defined(CONFIG_DRM_AMD_DC_DCN2_0)
+ 	uint32_t  reset_length = 0;
+ #endif
++	/* we have checked I2c not used by DMCU, set SW use I2C REQ to 1 to indicate SW using it*/
++	REG_UPDATE(DC_I2C_ARBITRATION, DC_I2C_SW_USE_I2C_REG_REQ, 1);
+ 
+ 	/* we have checked I2c not used by DMCU, set SW use I2C REQ to 1 to indicate SW using it*/
+ 	REG_UPDATE(DC_I2C_ARBITRATION, DC_I2C_SW_USE_I2C_REG_REQ, 1);
+-- 
+2.17.1
+