forked from Minki/linux
drm/radeon/dpm: handle bapm on trinity
bapm is a power management feature for handling the power budget between the CPU and GPU on APUs. This patch adds support for enabling or disabling it. For now disable it by default. Enabling it properly requires quite a bit more work and will be addressed in a separate patch. This patch fixes hangs on boot on certain trinity laptops when the system is on battery power. Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Cc: stable@vger.kernel.org
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@ -163,6 +163,8 @@ typedef uint8_t PPSMC_Result;
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#define PPSMC_MSG_VCEPowerON ((uint32_t) 0x10f)
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#define PPSMC_MSG_DCE_RemoveVoltageAdjustment ((uint32_t) 0x11d)
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#define PPSMC_MSG_DCE_AllowVoltageAdjustment ((uint32_t) 0x11e)
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#define PPSMC_MSG_EnableBAPM ((uint32_t) 0x120)
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#define PPSMC_MSG_DisableBAPM ((uint32_t) 0x121)
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#define PPSMC_MSG_UVD_DPM_Config ((uint32_t) 0x124)
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@ -1091,6 +1091,7 @@ int trinity_dpm_enable(struct radeon_device *rdev)
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trinity_program_sclk_dpm(rdev);
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trinity_start_dpm(rdev);
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trinity_wait_for_dpm_enabled(rdev);
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trinity_dpm_bapm_enable(rdev, false);
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trinity_release_mutex(rdev);
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if (rdev->irq.installed &&
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@ -1116,6 +1117,7 @@ void trinity_dpm_disable(struct radeon_device *rdev)
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trinity_release_mutex(rdev);
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return;
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}
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trinity_dpm_bapm_enable(rdev, false);
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trinity_disable_clock_power_gating(rdev);
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sumo_clear_vc(rdev);
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trinity_wait_for_level_0(rdev);
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@ -118,6 +118,7 @@ struct trinity_power_info {
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#define TRINITY_AT_DFLT 30
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/* trinity_smc.c */
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int trinity_dpm_bapm_enable(struct radeon_device *rdev, bool enable);
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int trinity_dpm_config(struct radeon_device *rdev, bool enable);
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int trinity_uvd_dpm_config(struct radeon_device *rdev);
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int trinity_dpm_force_state(struct radeon_device *rdev, u32 n);
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@ -56,6 +56,14 @@ static int trinity_notify_message_to_smu(struct radeon_device *rdev, u32 id)
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return 0;
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}
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int trinity_dpm_bapm_enable(struct radeon_device *rdev, bool enable)
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{
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if (enable)
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return trinity_notify_message_to_smu(rdev, PPSMC_MSG_EnableBAPM);
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else
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return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DisableBAPM);
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}
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int trinity_dpm_config(struct radeon_device *rdev, bool enable)
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{
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if (enable)
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