lwn.git/drivers/gpu/drm/amd/display/dc/irq/dcn30, branch master

drm/amd/display: Fixed Silence complier warnings in dc

2026-03-30T19:12:15+00:00

[Why] Resolve compiler warnings by marking unused parameters explicitly. [How] In .c and .h function definitions, keep parameter names in signatures and add a line with `(void)param;` in function body Preserved function signatures and avoids breaking code paths that may reference the parameter under conditional compilation. Reviewed-by: Dillon Varone Reviewed-by: Austin Zheng Signed-off-by: Gaghik Khachatrian Signed-off-by: Chuanyu Tseng Signed-off-by: Alex Deucher

drm/amd/display: Fix Silence signed/unsighed mismatch warning in dc

2026-03-30T18:55:17+00:00

[Why] Implicit signed-to-unsigned conversions caused compiler warnings in DC paths. [How] Added explicit (unsigned int)/(uint32_t) casts for sentinel -1 assignments and IRQ ~MASK initializers, with small cast alignment in logging/DPCD code. Functionality and behavior is unchanged; only type intent is explicit. Reviewed-by: Dillon Varone Signed-off-by: Gaghik Khachatrian Signed-off-by: Chuanyu Tseng Signed-off-by: Alex Deucher

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-22T01:09:51+00:00

This was done entirely with mindless brute force, using git grep -l '\

treewide: Replace kmalloc with kmalloc_obj for non-scalar types

2026-02-21T09:02:28+00:00

This is the result of running the Coccinelle script from scripts/coccinelle/api/kmalloc_objs.cocci. The script is designed to avoid scalar types (which need careful case-by-case checking), and instead replace kmalloc-family calls that allocate struct or union object instances: Single allocations: kmalloc(sizeof(TYPE), ...) are replaced with: kmalloc_obj(TYPE, ...) Array allocations: kmalloc_array(COUNT, sizeof(TYPE), ...) are replaced with: kmalloc_objs(TYPE, COUNT, ...) Flex array allocations: kmalloc(struct_size(PTR, FAM, COUNT), ...) are replaced with: kmalloc_flex(*PTR, FAM, COUNT, ...) (where TYPE may also be *VAR) The resulting allocations no longer return "void *", instead returning "TYPE *". Signed-off-by: Kees Cook

drm/amd/display/dc/irq: Remove duplications of hpd_ack function from IRQ

2025-05-13T13:37:09+00:00

The major of dcn and dce irqs share a copy-pasted collection of copy-pasted function, which is: hpd_ack. This patch removes the multiple copy-pasted by moving them to the irq_service.c and make the irq_service's calls the functions implemented by the irq_service.c instead. The hpd_ack function is replaced by hpd0_ack and hpd1_ack, the required constants are also added. The changes were not tested on actual hardware. I am only able to verify that the changes keep the code compileable and do my best to look repeatedly if I am not actually changing any code. Signed-off-by: Sebastian Aguilera Novoa Reviewed-by: Alex Hung Signed-off-by: Alex Deucher

drm/amd/display: Add DCN35 IRQ

2023-08-30T19:51:15+00:00

[Why & How] - Add IRQ handling for DCN35 - Update IRQ files for other DCNs in accordance to change in irq_service.h Signed-off-by: Qingqing Zhuo Acked-by: Harry Wentland Signed-off-by: Alex Deucher

drm/amd/display: Support vertical interrupt 0 for all dcn ASIC

2022-07-20T20:04:11+00:00

[Why] When CONFIG_DRM_AMD_SECURE_DISPLAY is enabled, it will try to register vertical interrupt 0 for specific task. Currently, only dcn10 have defined relevant info for vertical interrupt 0. If we enable CONFIG_DRM_AMD_SECURE_DISPLAY for other dcn ASIC, will get DC_IRQ_SOURCE_INVALID while calling dc_interrupt_to_irq_source() and cause pointer errors. [How] Add support of vertical interrupt 0 for all dcn ASIC. Tested-by: Daniel Wheeler Acked-by: Alan Liu Signed-off-by: Wayne Lin Signed-off-by: Alex Deucher

drm/amd/display: remove redundant CONFIG_DRM_AMD_DC_DCN in irq

2022-05-10T21:53:13+00:00

[Why & How] CONFIG_DRM_AMD_DC_DCN is used by pass the compilation failures, but DC code should be OS-agnostic. This patch fixes it by removing unnecessasry CONFIG_DRM_AMD_DC_DCN in irq directory. Reviewed-by: Rodrigo Siqueira Acked-by: Stylon Wang Signed-off-by: Alex Hung Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Turn global functions into static functions

2022-02-23T19:03:20+00:00

Turn previously global functions into static functions to avoid -Wmissing-prototype warnings, such as: drivers/gpu/drm/amd/amdgpu/../display/dc/irq/dcn30/irq_service_dcn30.c:50:20: warning: no previous prototype for function 'to_dal_irq_source_dcn30' [-Wmissing-prototypes] enum dc_irq_source to_dal_irq_source_dcn30( ^ drivers/gpu/drm/amd/amdgpu/../display/dc/irq/dcn30/irq_service_dcn30.c:50:1: note: declare 'static' if the function is not intended to be used outside of this translation unit enum dc_irq_source to_dal_irq_source_dcn30( ^ static 1 warning generated. drivers/gpu/drm/amd/amdgpu/../display/dc/clk_mgr/dcn316/dcn316_clk_mgr.c:488:6: warning: no previous prototype for function 'dcn316_clk_mgr_helper_populate_bw_params' [-Wmissing-prototypes] void dcn316_clk_mgr_helper_populate_bw_params( ^ drivers/gpu/drm/amd/amdgpu/../display/dc/clk_mgr/dcn316/dcn316_clk_mgr.c:488:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void dcn316_clk_mgr_helper_populate_bw_params( ^ static 1 warning generated. v2: drop is_timing_changed hunk (Alex) Signed-off-by: Maíra Canal Signed-off-by: Alex Deucher

drm/amdgpu: move dpcs_3_0_0 headers from dcn to dpcs

2022-02-07T23:03:50+00:00

To align with other headers. Reviewed-by: Harry Wentland Signed-off-by: Alex Deucher