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drm/amd/display: Add DC Debug mask to disable features for bringup 

[Why]
At bringup we want to be able to disable various power features.

[How]
These features are already exposed as dc_debug_options and exercised
on other OSes. Create a new dc_debug_mask module parameter and expose
relevant bits, in particular
 * DC_DISABLE_PIPE_SPLIT
 * DC_DISABLE_STUTTER
 * DC_DISABLE_DSC
 * DC_DISABLE_CLOCK_GATING

Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Harry Wentland 2020-05-01 14:23:37 -04:00 committed by Alex Deucher
parent 9f76f7e878
commit 8a791dabea
4 changed files with 30 additions and 0 deletions
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1
drivers/gpu/drm/amd/amdgpu/amdgpu.h
View File

@ -173,6 +173,7 @@ extern int amdgpu_gpu_recovery;
extern int amdgpu_emu_mode;
extern uint amdgpu_smu_memory_pool_size;
extern uint amdgpu_dc_feature_mask;
extern uint amdgpu_dc_debug_mask;
extern uint amdgpu_dm_abm_level;
extern struct amdgpu_mgpu_info mgpu_info;
extern int amdgpu_ras_enable;

8
drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
View File

@ -140,6 +140,7 @@ int amdgpu_emu_mode = 0;
uint amdgpu_smu_memory_pool_size = 0;
/* FBC (bit 0) disabled by default*/
uint amdgpu_dc_feature_mask = 0;
uint amdgpu_dc_debug_mask = 0;
int amdgpu_async_gfx_ring = 1;
int amdgpu_mcbp = 0;
int amdgpu_discovery = -1;
@ -714,6 +715,13 @@ MODULE_PARM_DESC(queue_preemption_timeout_ms, "queue preemption timeout in ms (1
MODULE_PARM_DESC(dcfeaturemask, "all stable DC features enabled (default))");
module_param_named(dcfeaturemask, amdgpu_dc_feature_mask, uint, 0444);
/**
* DOC: dcdebugmask (uint)
* Override display features enabled. See enum DC_DEBUG_MASK in drivers/gpu/drm/amd/include/amd_shared.h.
*/
MODULE_PARM_DESC(dcdebugmask, "all debug options disabled (default))");
module_param_named(dcdebugmask, amdgpu_dc_debug_mask, uint, 0444);
/**
* DOC: abmlevel (uint)
* Override the default ABM (Adaptive Backlight Management) level used for DC

14
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
View File

@ -918,6 +918,20 @@ static int amdgpu_dm_init(struct amdgpu_device *adev)
goto error;
}
if (amdgpu_dc_debug_mask & DC_DISABLE_PIPE_SPLIT) {
adev->dm.dc->debug.force_single_disp_pipe_split = false;
adev->dm.dc->debug.pipe_split_policy = MPC_SPLIT_AVOID;
}
if (amdgpu_dc_debug_mask & DC_DISABLE_STUTTER)
adev->dm.dc->debug.disable_stutter = true;
if (amdgpu_dc_debug_mask & DC_DISABLE_DSC)
adev->dm.dc->debug.disable_dsc = true;
if (amdgpu_dc_debug_mask & DC_DISABLE_CLOCK_GATING)
adev->dm.dc->debug.disable_clock_gate = true;
r = dm_dmub_hw_init(adev);
if (r) {
DRM_ERROR("DMUB interface failed to initialize: status=%d\n", r);

7
drivers/gpu/drm/amd/include/amd_shared.h
View File

@ -150,6 +150,13 @@ enum DC_FEATURE_MASK {
DC_PSR_MASK = 0x8,
};
enum DC_DEBUG_MASK {
DC_DISABLE_PIPE_SPLIT = 0x1,
DC_DISABLE_STUTTER = 0x2,
DC_DISABLE_DSC = 0x4,
DC_DISABLE_CLOCK_GATING = 0x8
};
enum amd_dpm_forced_level;
/**
* struct amd_ip_funcs - general hooks for managing amdgpu IP Blocks