0-4: User via command line
Also introduce a Kconfig option that allows distributions to choose
the default policy that is appropriate for them.
Fixes: f97e4303da16 ("drm/amd/display: add panel_power_savings sysfs
entry to eDP connectors")
Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxx>
---
Cc: Hamza Mahfooz <Hamza.Mahfooz@xxxxxxx>
Cc: Harry Wentland <Harry.Wentland@xxxxxxx>
Cc: Sun peng (Leo) Li <Sunpeng.Li@xxxxxxx>
drivers/gpu/drm/amd/amdgpu/Kconfig | 72
+++++++++++++++++++
drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 23 +++---
.../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 6 +-
3 files changed, 90 insertions(+), 11 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/Kconfig
b/drivers/gpu/drm/amd/amdgpu/Kconfig
index 22d88f8ef527..2ab57ccf6f21 100644
--- a/drivers/gpu/drm/amd/amdgpu/Kconfig
+++ b/drivers/gpu/drm/amd/amdgpu/Kconfig
@@ -80,6 +80,78 @@ config DRM_AMDGPU_WERROR
Add -Werror to the build flags for amdgpu.ko.
Only enable this if you are warning code for amdgpu.ko.
+choice
+ prompt "Amdgpu panel power Savings"
+ default AMDGPU_SYSFS_ABM
+ help
+ Control the default behavior for adaptive panel power savings.
+
+ Panel power savings features will sacrifice color accuracy
+ in exchange for power savings.
+
+ This can be configured for:
+ - dynamic control by the DRM master
+ - dynamic control by sysfs nodes
+ - statically by the user at kernel compile time
+
+ This value can also be overridden by the amdgpu.abmlevel
+ module parameter.
+
+config AMDGPU_DRM_ABM
+ bool "DRM Master control"
+ help
+ Export a property called 'abm_level' that can be
+ manipulated by the DRM master for supported hardware.
+
+config AMDGPU_SYSFS_ABM
+ bool "sysfs control"
+ help
+ Export a sysfs file 'panel_power_savings' that can be
+ manipulated by userspace for supported hardware.
+
+config AMDGPU_HARDCODE_ABM0
+ bool "No Panel power savings"
+ help
+ Disable panel power savings.
+ It can only overridden by the kernel command line.
+
+config AMDGPU_HARDCODE_ABM1
+ bool "25% Panel power savings"
+ help
+ Set the ABM panel power savings algorithm to 25%.
+ It can only overridden by the kernel command line.
+
+config AMDGPU_HARDCODE_ABM2
+ bool "50% Panel power savings"
+ help
+ Set the ABM panel power savings algorithm to 50%.
+ It can only overridden by the kernel command line.
+
+config AMDGPU_HARDCODE_ABM3
+ bool "75% Panel power savings"
+ help
+ Set the ABM panel power savings algorithm to 75%.
+ It can only overridden by the kernel command line.
+
+config AMDGPU_HARDCODE_ABM4
+ bool "100% Panel power savings"
+ help
+ Set the ABM panel power savings algorithm to 100%.
+ It can only overridden by the kernel command line.
+endchoice
+
+config AMDGPU_ABM_POLICY
+ int
+ default -2 if AMDGPU_DRM_ABM
+ default -1 if AMDGPU_SYSFS_ABM
+ default 0 if AMDGPU_HARDCODE_ABM0
+ default 1 if AMDGPU_HARDCODE_ABM1
+ default 2 if AMDGPU_HARDCODE_ABM2
+ default 3 if AMDGPU_HARDCODE_ABM3
+ default 4 if AMDGPU_HARDCODE_ABM4
+ default -1
+
+
source "drivers/gpu/drm/amd/acp/Kconfig"
source "drivers/gpu/drm/amd/display/Kconfig"
source "drivers/gpu/drm/amd/amdkfd/Kconfig"
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
index af7fae7907d7..00d6c8b58716 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
@@ -844,17 +844,24 @@ module_param_named(visualconfirm,
amdgpu_dc_visual_confirm, uint, 0444);
* DOC: abmlevel (uint)
* Override the default ABM (Adaptive Backlight Management) level
used for DC
* enabled hardware. Requires DMCU to be supported and loaded.
- * Valid levels are 0-4. A value of 0 indicates that ABM should be
disabled by
- * default. Values 1-4 control the maximum allowable brightness
reduction via
- * the ABM algorithm, with 1 being the least reduction and 4 being
the most
- * reduction.
+ * Valid levels are -2 through 4.
*
- * Defaults to -1, or disabled. Userspace can only override this
level after
- * boot if it's set to auto.
+ * -2: indicates that ABM should be controlled by DRM property
'abm_level.
+ * -1: indicates that ABM should be controlled by the sysfs file
+ * 'panel_power_savings'.
+ * 0: indicates that ABM should be disabled.
+ * 1-4: control the maximum allowable brightness reduction via
+ * the ABM algorithm, with 1 being the least reduction and 4
being the most
+ * reduction.
+ *
+ * Both the DRM property 'abm_level' and the sysfs file
'panel_power_savings'
+ * will only be available on supported hardware configurations.
+ *
+ * The default value is configured by kernel configuration option
AMDGPU_ABM_POLICY
*/
-int amdgpu_dm_abm_level = -1;
+int amdgpu_dm_abm_level = CONFIG_AMDGPU_ABM_POLICY;
MODULE_PARM_DESC(abmlevel,
- "ABM level (0 = off, 1-4 = backlight reduction level, -1
auto (default))");
+ "ABM level (0 = off, 1-4 = backlight reduction level, -1 =
sysfs control, -2 = drm control");
module_param_named(abmlevel, amdgpu_dm_abm_level, int, 0444);
int amdgpu_backlight = -1;
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 b9ac3d2f8029..147fe744f82e 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -6515,7 +6515,7 @@ static void
amdgpu_dm_connector_unregister(struct drm_connector *connector)
struct amdgpu_dm_connector *amdgpu_dm_connector =
to_amdgpu_dm_connector(connector);
if (connector->connector_type == DRM_MODE_CONNECTOR_eDP &&
- amdgpu_dm_abm_level < 0)
+ amdgpu_dm_abm_level == -1)
sysfs_remove_group(&connector->kdev->kobj, &amdgpu_group);
drm_dp_aux_unregister(&amdgpu_dm_connector->dm_dp_aux.aux);
@@ -6623,7 +6623,7 @@ amdgpu_dm_connector_late_register(struct
drm_connector *connector)
int r;
if (connector->connector_type == DRM_MODE_CONNECTOR_eDP &&
- amdgpu_dm_abm_level < 0) {
+ amdgpu_dm_abm_level == -1) {
r = sysfs_create_group(&connector->kdev->kobj,
&amdgpu_group);
if (r)
@@ -7654,7 +7654,7 @@ void amdgpu_dm_connector_init_helper(struct
amdgpu_display_manager *dm,
if (connector_type == DRM_MODE_CONNECTOR_eDP &&
(dc_is_dmcu_initialized(adev->dm.dc) ||
- adev->dm.dc->ctx->dmub_srv) && amdgpu_dm_abm_level < 0) {
+ adev->dm.dc->ctx->dmub_srv) && amdgpu_dm_abm_level == -2) {
drm_object_attach_property(&aconnector->base.base,
adev->mode_info.abm_level_property, 0);
}
