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drm/amd: Fix set but not used warnings

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There are many set but not used warnings under drivers/gpu/drm/amd when
compiling with the latest upstream mainline GCC:

  drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c:305:18: warning: variable ‘p’ set but not used [-Wunused-but-set-variable=]
  drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.h:103:26: warning: variable ‘internal_reg_offset’ set but not used [-Wunused-but-set-variable=]
  ...
  drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.h:164:26: warning: variable ‘internal_reg_offset’ set but not used [-Wunused-but-set-variable=]
  ...
  drivers/gpu/drm/amd/amdgpu/../display/dc/dc_dmub_srv.c:445:13: warning: variable ‘pipe_idx’ set but not used [-Wunused-but-set-variable=]
  drivers/gpu/drm/amd/amdgpu/../display/dc/dc_dmub_srv.c:875:21: warning: variable ‘pipe_idx’ set but not used [-Wunused-but-set-variable=]

Remove the variables actually not used or add __maybe_unused attribute for
the variables actually used to fix them, compile tested only.

Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Tiezhu Yang 2025-10-16 14:51:17 +08:00 • committed by Alex Deucher
parent 7169e706c8
commit 46791d147d
3 changed files with 8 additions and 11 deletions
Download patch file Download diff file Expand all files Collapse all files

4
drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c
View file

@ -302,7 +302,6 @@ void amdgpu_gart_unbind(struct amdgpu_device *adev, uint64_t offset,
int pages)
{
unsigned t;
unsigned p;
int i, j;
u64 page_base;
/* Starting from VEGA10, system bit must be 0 to mean invalid. */
@ -316,8 +315,7 @@ void amdgpu_gart_unbind(struct amdgpu_device *adev, uint64_t offset,
return;
t = offset / AMDGPU_GPU_PAGE_SIZE;
p = t / AMDGPU_GPU_PAGES_IN_CPU_PAGE;
for (i = 0; i < pages; i++, p++) {
for (i = 0; i < pages; i++) {
page_base = adev->dummy_page_addr;
if (!adev->gart.ptr)
continue;

6
drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.h
View file

@ -100,7 +100,8 @@
#define SOC15_DPG_MODE_OFFSET(ip, inst_idx, reg) \
({ \
uint32_t internal_reg_offset, addr; \
/* To avoid a -Wunused-but-set-variable warning. */ \
uint32_t internal_reg_offset __maybe_unused, addr; \
bool video_range, video1_range, aon_range, aon1_range; \
\
addr = (adev->reg_offset[ip##_HWIP][inst_idx][reg##_BASE_IDX] + reg); \
@ -161,7 +162,8 @@
#define SOC24_DPG_MODE_OFFSET(ip, inst_idx, reg) \
({ \
uint32_t internal_reg_offset, addr; \
/* To avoid a -Wunused-but-set-variable warning. */ \
uint32_t internal_reg_offset __maybe_unused, addr; \
bool video_range, video1_range, aon_range, aon1_range; \
\
addr = (adev->reg_offset[ip##_HWIP][inst_idx][reg##_BASE_IDX] + reg); \

9
drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c
View file

@ -442,7 +442,6 @@ bool dc_dmub_srv_p_state_delegate(struct dc *dc, bool should_manage_pstate, stru
int i = 0, k = 0;
int ramp_up_num_steps = 1; // TODO: Ramp is currently disabled. Reenable it.
uint8_t visual_confirm_enabled;
int pipe_idx = 0;
struct dc_stream_status *stream_status = NULL;
if (dc == NULL)
@ -457,7 +456,7 @@ bool dc_dmub_srv_p_state_delegate(struct dc *dc, bool should_manage_pstate, stru
cmd.fw_assisted_mclk_switch.config_data.visual_confirm_enabled = visual_confirm_enabled;
if (should_manage_pstate) {
for (i = 0, pipe_idx = 0; i < dc->res_pool->pipe_count; i++) {
for (i = 0; i < dc->res_pool->pipe_count; i++) {
struct pipe_ctx *pipe = &context->res_ctx.pipe_ctx[i];
if (!pipe->stream)
@ -472,7 +471,6 @@ bool dc_dmub_srv_p_state_delegate(struct dc *dc, bool should_manage_pstate, stru
cmd.fw_assisted_mclk_switch.config_data.vactive_stretch_margin_us = dc->debug.fpo_vactive_margin_us;
break;
}
pipe_idx++;
}
}
@ -872,7 +870,7 @@ void dc_dmub_setup_subvp_dmub_command(struct dc *dc,
bool enable)
{
uint8_t cmd_pipe_index = 0;
uint32_t i, pipe_idx;
uint32_t i;
uint8_t subvp_count = 0;
union dmub_rb_cmd cmd;
struct pipe_ctx *subvp_pipes[2];
@ -899,7 +897,7 @@ void dc_dmub_setup_subvp_dmub_command(struct dc *dc,
if (enable) {
// For each pipe that is a "main" SUBVP pipe, fill in pipe data for DMUB SUBVP cmd
for (i = 0, pipe_idx = 0; i < dc->res_pool->pipe_count; i++) {
for (i = 0; i < dc->res_pool->pipe_count; i++) {
struct pipe_ctx *pipe = &context->res_ctx.pipe_ctx[i];
pipe_mall_type = dc_state_get_pipe_subvp_type(context, pipe);
@ -922,7 +920,6 @@ void dc_dmub_setup_subvp_dmub_command(struct dc *dc,
populate_subvp_cmd_vblank_pipe_info(dc, context, &cmd, pipe, cmd_pipe_index++);
}
pipe_idx++;
}
if (subvp_count == 2) {
update_subvp_prefetch_end_to_mall_start(dc, context, &cmd, subvp_pipes);