kernel/linux.git/drivers/gpu/drm/amd/amdgpu/amdgpu_i2c.c, branch v6.18.21

drm/amdgpu/amdgpu_i2c: Use devm_i2c_add_adapter instead of i2c_add_adapter

2025-09-16T21:47:22+00:00

This commit replaces i2c_add_adapter() with devm_i2c_add_adapter() and removes part of the cleanup logic since the new function handles the i2c removal. Signed-off-by: Rodrigo Siqueira Signed-off-by: Alex Deucher

drm/amd: Do not include when unused

2025-06-30T15:53:45+00:00

Fix the following compile time warning when building with W=1: warning: EXPORT_SYMBOL() is not used, but #include is present Acked-by: Christian König Signed-off-by: André Almeida Signed-off-by: Alex Deucher

drm/amdgpu: add OEM i2c bus for polaris chips

2025-02-13T02:02:54+00:00

It uses the VGADCC bus. DC doesn't use this bus, so it is safe to add it here. Reviewed-by: Harry Wentland Signed-off-by: Alex Deucher

drm/amdgpu: rework i2c init and fini

2025-02-13T02:02:54+00:00

No functional change. Rework the code to allow for adding some additional i2c buses in conjunction with DC in the future. Reviewed-by: Harry Wentland Signed-off-by: Alex Deucher

drm/amdgpu: Remove unused amdgpu_i2c functions

2024-09-26T21:06:36+00:00

amdgpu_i2c_add and amdgpu_i2c_init were added in 2015's commit d38ceaf99ed0 ("drm/amdgpu: add core driver (v4)") but never used. Remove them. Signed-off-by: Dr. David Alan Gilbert Signed-off-by: Alex Deucher

drm/amdgpu: add return result for amdgpu_i2c_{get/put}_byte

2024-04-26T21:22:43+00:00

After amdgpu_i2c_get_byte fail, amdgpu_i2c_put_byte shouldn't be conducted to put wrong value. So return and check the i2c transfer result. Signed-off-by: Bob Zhou Reviewed-by: Christian König Signed-off-by: Alex Deucher

drm: remove I2C_CLASS_DDC support

2024-01-18T20:10:41+00:00

After removal of the legacy EEPROM driver and I2C_CLASS_DDC support in olpc_dcon there's no i2c client driver left supporting I2C_CLASS_DDC. Class-based device auto-detection is a legacy mechanism and shouldn't be used in new code. So we can remove this class completely now. Acked-by: Alex Deucher Acked-by: Dmitry Baryshkov Acked-by: Harry Wentland Acked-by: Heiko Stuebner Acked-by: Jani Nikula Acked-by: Jernej Skrabec Reviewed-by: Thomas Zimmermann Reviewed-by: Andi Shyti Reviewed-by: AngeloGioacchino Del Regno Reviewed-by: Neil Armstrong Signed-off-by: Heiner Kallweit Signed-off-by: Wolfram Sang

gpu: drm: amd: amdgpu: amdgpu_i2c: fix possible uninitialized-variable access in amdgpu_i2c_router_select_ddc_port()

2021-08-11T21:19:54+00:00

The variable val is declared without initialization, and its address is passed to amdgpu_i2c_get_byte(). In this function, the value of val is accessed in: DRM_DEBUG("i2c 0x%02x 0x%02x read failed\n", addr, *val); Also, when amdgpu_i2c_get_byte() returns, val may remain uninitialized, but it is accessed in: val &= ~amdgpu_connector->router.ddc_mux_control_pin; To fix this possible uninitialized-variable access, initialize val to 0 in amdgpu_i2c_router_select_ddc_port(). Reported-by: TOTE Robot Signed-off-by: Tuo Li Signed-off-by: Alex Deucher

drm/amdgpu: Remove references to struct drm_device.pdev

2021-01-13T08:02:58+00:00

Using struct drm_device.pdev is deprecated. Convert amdgpu to struct drm_device.dev. No functional changes. v3: * rebased Signed-off-by: Thomas Zimmermann Acked-by: Christian König Acked-by: Alex Deucher Acked-by: Sam Ravnborg Cc: Alex Deucher Cc: Christian König Link: https://patchwork.freedesktop.org/patch/msgid/20210107080748.4768-3-tzimmermann@suse.de

drm/amdgpu: Get DRM dev from adev by inline-f

2020-08-24T17:06:06+00:00

Add a static inline adev_to_drm() to obtain the DRM device pointer from an amdgpu_device pointer. Signed-off-by: Luben Tuikov Reviewed-by: Alex Deucher Signed-off-by: Alex Deucher