diff options
Diffstat (limited to 'meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/4015-drm-amdgpu-add-lock-for-i2c-bus.patch')
| -rw-r--r-- | meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/4015-drm-amdgpu-add-lock-for-i2c-bus.patch | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/4015-drm-amdgpu-add-lock-for-i2c-bus.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/4015-drm-amdgpu-add-lock-for-i2c-bus.patch new file mode 100644 index 00000000..61a25548 --- /dev/null +++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/4015-drm-amdgpu-add-lock-for-i2c-bus.patch @@ -0,0 +1,42 @@ +From 35f31816a1fcb441728ee33103c023cb918fb78d Mon Sep 17 00:00:00 2001 +From: Andrey Grodzovsky <andrey.grodzovsky@amd.com> +Date: Thu, 10 Oct 2019 16:41:54 +0800 +Subject: [PATCH 4015/4256] drm/amdgpu: add lock for i2c bus + +I2C bus must be locked at all time we access the I2C bus. + +Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com> +Reviewed-by: Rui Teng <rui.teng@amd.com> +--- + drivers/gpu/drm/amd/amdgpu/smu_v11_0_i2c.c | 8 ++++++++ + 1 file changed, 8 insertions(+) + +diff --git a/drivers/gpu/drm/amd/amdgpu/smu_v11_0_i2c.c b/drivers/gpu/drm/amd/amdgpu/smu_v11_0_i2c.c +index aad83932dd05..15674337144f 100644 +--- a/drivers/gpu/drm/amd/amdgpu/smu_v11_0_i2c.c ++++ b/drivers/gpu/drm/amd/amdgpu/smu_v11_0_i2c.c +@@ -630,6 +630,10 @@ static int smu_v11_0_i2c_eeprom_i2c_xfer(struct i2c_adapter *i2c_adap, + int i, ret; + struct amdgpu_ras_eeprom_control *control = to_eeprom_control(i2c_adap); + ++#if !defined(HAVE_I2C_LOCK_OPERATIONS_STRUCT) ++ lock_bus(i2c_adap, 0); ++#endif ++ + if (!control->bus_locked) { + DRM_ERROR("I2C bus unlocked, stopping transaction!"); + return -EIO; +@@ -654,6 +658,10 @@ static int smu_v11_0_i2c_eeprom_i2c_xfer(struct i2c_adapter *i2c_adap, + } + + smu_v11_0_i2c_fini(i2c_adap); ++ ++#if !defined(HAVE_I2C_LOCK_OPERATIONS_STRUCT) ++ unlock_bus(i2c_adap, 0); ++#endif + return num; + } + +-- +2.17.1 + |