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charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: amd-gfx-bounces@lists.freedesktop.org Sender: "amd-gfx" Documents PP_FEATURE_MASK enum. Provides instructions on how to use ppfeaturemasks. v2: Improved enum definitions. Adds kernel command line parameters to ppfeaturemask instructions. Signed-off-by: Ryan Taylor Reviewed-by: Alex Deucher --- drivers/gpu/drm/amd/include/amd_shared.h | 28 ++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/drivers/gpu/drm/amd/include/amd_shared.h b/drivers/gpu/drm/amd/include/amd_shared.h index e98c84ef206f..7c84d5beb600 100644 --- a/drivers/gpu/drm/amd/include/amd_shared.h +++ b/drivers/gpu/drm/amd/include/amd_shared.h @@ -128,6 +128,34 @@ enum amd_powergating_state { #define AMD_PG_SUPPORT_ATHUB (1 << 16) #define AMD_PG_SUPPORT_JPEG (1 << 17) +/** +* enum PP_FEATURE_MASK - Used to mask power play features. +* +* @PP_SCLK_DPM_MASK: Dynamic adjustment of the system (graphics) clock. +* @PP_MCLK_DPM_MASK: Dynamic adjustment of the memory clock. +* @PP_PCIE_DPM_MASK: Dynamic adjustment of PCIE clocks and lanes. +* @PP_SCLK_DEEP_SLEEP_MASK: System (graphics) clock deep sleep. +* @PP_POWER_CONTAINMENT_MASK: Power containment. +* @PP_UVD_HANDSHAKE_MASK: Unified video decoder handshake. +* @PP_SMC_VOLTAGE_CONTROL_MASK: Dynamic voltage control. +* @PP_VBI_TIME_SUPPORT_MASK: Vertical blank interval support. +* @PP_ULV_MASK: Ultra low voltage. +* @PP_ENABLE_GFX_CG_THRU_SMU: SMU control of GFX engine clockgating. +* @PP_CLOCK_STRETCH_MASK: Clock stretching. +* @PP_OD_FUZZY_FAN_CONTROL_MASK: Overdrive fuzzy fan control. +* @PP_SOCCLK_DPM_MASK: Dynamic adjustment of the SoC clock. +* @PP_DCEFCLK_DPM_MASK: Dynamic adjustment of the Display Controller Engine Fabric clock. +* @PP_OVERDRIVE_MASK: Over- and under-clocking support. +* @PP_GFXOFF_MASK: Dynamic graphics engine power control. +* @PP_ACG_MASK: Adaptive clock generator. +* @PP_STUTTER_MODE: Stutter mode. +* @PP_AVFS_MASK: Adaptive voltage and frequency scaling. +* +* To override these settings on boot, append amdgpu.ppfeaturemask= to +* the kernel's command line parameters. This is usually done through a system's +* boot loader (E.g. GRUB). If manually loading the driver, pass +* ppfeaturemask= as a modprobe parameter. +*/ enum PP_FEATURE_MASK { PP_SCLK_DPM_MASK = 0x1, PP_MCLK_DPM_MASK = 0x2, -- 2.28.0 _______________________________________________ amd-gfx mailing list amd-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/amd-gfx