On 2/21/25 10:10, Mario Limonciello wrote:
Making a copy of the backlight caps structure between uses is unnecessary.
Refer to pointers to the same structure when using it.
Signed-off-by: Mario Limonciello <mario.limoncie...@amd.com>
---
.../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 50 ++++++++-----------
1 file changed, 21 insertions(+), 29 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 0d21448ea700..70c8d800e173 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -4646,47 +4646,39 @@ static void amdgpu_dm_update_backlight_caps(struct
amdgpu_display_manager *dm,
int bl_idx)
{
#if defined(CONFIG_ACPI)
- struct amdgpu_dm_backlight_caps caps;
-
- memset(&caps, 0, sizeof(caps));
+ struct amdgpu_dm_backlight_caps *caps = &dm->backlight_caps[bl_idx];
- if (dm->backlight_caps[bl_idx].caps_valid)
+ if (caps->caps_valid)
return;
- amdgpu_acpi_get_backlight_caps(&caps);
+ amdgpu_acpi_get_backlight_caps(caps);
/* validate the firmware value is sane */
- if (caps.caps_valid) {
- int spread = caps.max_input_signal - caps.min_input_signal;
+ if (caps->caps_valid) {
+ int spread = caps->max_input_signal - caps->min_input_signal;
- if (caps.max_input_signal > AMDGPU_DM_DEFAULT_MAX_BACKLIGHT ||
- caps.min_input_signal < 0 ||
+ if (caps->max_input_signal > AMDGPU_DM_DEFAULT_MAX_BACKLIGHT ||
+ caps->min_input_signal < 0 ||
spread > AMDGPU_DM_DEFAULT_MAX_BACKLIGHT ||
spread < AMDGPU_DM_MIN_SPREAD) {
DRM_DEBUG_KMS("DM: Invalid backlight caps: min=%d,
max=%d\n",
- caps.min_input_signal,
caps.max_input_signal);
- caps.caps_valid = false;
+ caps->min_input_signal,
caps->max_input_signal);
+ caps->caps_valid = false;
}
}
- if (caps.caps_valid) {
- dm->backlight_caps[bl_idx].caps_valid = true;
- if (caps.aux_support)
- return;
- dm->backlight_caps[bl_idx].min_input_signal =
caps.min_input_signal;
- dm->backlight_caps[bl_idx].max_input_signal =
caps.max_input_signal;
- } else {
- dm->backlight_caps[bl_idx].min_input_signal =
- AMDGPU_DM_DEFAULT_MIN_BACKLIGHT;
- dm->backlight_caps[bl_idx].max_input_signal =
- AMDGPU_DM_DEFAULT_MAX_BACKLIGHT;
+ if (!caps->caps_valid) {
+ caps->min_input_signal = AMDGPU_DM_DEFAULT_MIN_BACKLIGHT;
+ caps->max_input_signal = AMDGPU_DM_DEFAULT_MAX_BACKLIGHT;
+ caps->caps_valid = true;
}
#else
- if (dm->backlight_caps[bl_idx].aux_support)
+ if (caps->aux_support)
return;
- dm->backlight_caps[bl_idx].min_input_signal = AMDGPU_DM_DEFAULT_MIN_BACKLIGHT;
- dm->backlight_caps[bl_idx].max_input_signal =
AMDGPU_DM_DEFAULT_MAX_BACKLIGHT;
+ caps->min_input_signal = AMDGPU_DM_DEFAULT_MIN_BACKLIGHT;
+ caps->max_input_signal = AMDGPU_DM_DEFAULT_MAX_BACKLIGHT;
+ caps->caps_valid = true;
caps is not defined in "#else" so this fails when CONFIG_ACPI is not
defined.
Below are errors messages for your references
[2025-02-27T05:12:05.659Z]
/jenkins/workspace/github/dal-linux-promotion-nightly-github/linux_temp/drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:4714:6:
error: use of undeclared identifier 'caps'
[2025-02-27T05:12:05.659Z] if (caps->aux_support)
[2025-02-27T05:12:05.659Z] ^
[2025-02-27T05:12:05.659Z]
/jenkins/workspace/github/dal-linux-promotion-nightly-github/linux_temp/drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:4717:2:
error: use of undeclared identifier 'caps'
[2025-02-27T05:12:05.659Z] caps->min_input_signal =
AMDGPU_DM_DEFAULT_MIN_BACKLIGHT;
[2025-02-27T05:12:05.659Z] ^
[2025-02-27T05:12:05.659Z]
/jenkins/workspace/github/dal-linux-promotion-nightly-github/linux_temp/drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:4718:2:
error: use of undeclared identifier 'caps'
[2025-02-27T05:12:05.659Z] caps->max_input_signal =
AMDGPU_DM_DEFAULT_MAX_BACKLIGHT;
[2025-02-27T05:12:05.659Z] ^
[2025-02-27T05:12:05.659Z]
/jenkins/workspace/github/dal-linux-promotion-nightly-github/linux_temp/drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:4719:2:
error: use of undeclared identifier 'caps'
[2025-02-27T05:12:05.659Z] caps->caps_valid = true;
[2025-02-27T05:12:05.659Z] ^
[2025-02-27T05:12:05.760Z] 4 errors generated.
#endif
}
@@ -4740,19 +4732,19 @@ static void amdgpu_dm_backlight_set_level(struct amdgpu_display_manager *dm,
int bl_idx,
u32 user_brightness)
{
- struct amdgpu_dm_backlight_caps caps;
+ struct amdgpu_dm_backlight_caps *caps;
struct dc_link *link;
u32 brightness;
bool rc, reallow_idle = false;
amdgpu_dm_update_backlight_caps(dm, bl_idx);
- caps = dm->backlight_caps[bl_idx];
+ caps = &dm->backlight_caps[bl_idx];
dm->brightness[bl_idx] = user_brightness;
/* update scratch register */
if (bl_idx == 0)
amdgpu_atombios_scratch_regs_set_backlight_level(dm->adev,
dm->brightness[bl_idx]);
- brightness = convert_brightness_from_user(&caps,
dm->brightness[bl_idx]);
+ brightness = convert_brightness_from_user(caps, dm->brightness[bl_idx]);
link = (struct dc_link *)dm->backlight_link[bl_idx];
/* Change brightness based on AUX property */
@@ -4762,7 +4754,7 @@ static void amdgpu_dm_backlight_set_level(struct
amdgpu_display_manager *dm,
reallow_idle = true;
}
- if (caps.aux_support) {
+ if (caps->aux_support) {
rc = dc_link_set_backlight_level_nits(link, true, brightness,
AUX_BL_DEFAULT_TRANSITION_TIME_MS);
if (!rc)
