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drm/amd/display: Load DMCU IRAM

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DMCU IRAM must be loaded by the driver before DMCU
can function.

Move the IRAM code out of the shadows and into a new file
modules/power/power_helpers.c

The IRAM table contains the backlight curve and ABM parameters

Add this new file to the Makefiles

Call dmcu_load_iram in late init of DM

Move struct dmcu_version from dc.h to dmcu.h to allow
dmcu to be included on its own

Signed-off-by: David Francis <David.Francis@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
David Francis
2018-11-26 11:38:33 -05:00
committed by Alex Deucher
parent 51f1f6f517
commit bbf854dc35
7 changed files with 435 additions and 8 deletions
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21
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
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@@ -71,6 +71,7 @@
#endif
#include "modules/inc/mod_freesync.h"
#include "modules/power/power_helpers.h"
#define FIRMWARE_RAVEN_DMCU "amdgpu/raven_dmcu.bin"
MODULE_FIRMWARE(FIRMWARE_RAVEN_DMCU);
@@ -642,6 +643,26 @@ static int dm_late_init(void *handle)
{
struct amdgpu_device *adev = (struct amdgpu_device *)handle;
struct dmcu_iram_parameters params;
unsigned int linear_lut[16];
int i;
struct dmcu *dmcu = adev->dm.dc->res_pool->dmcu;
bool ret;
for (i = 0; i < 16; i++)
linear_lut[i] = 0xFFFF * i / 15;
params.set = 0;
params.backlight_ramping_start = 0xCCCC;
params.backlight_ramping_reduction = 0xCCCCCCCC;
params.backlight_lut_array_size = 16;
params.backlight_lut_array = linear_lut;
ret = dmcu_load_iram(dmcu, params);
if (!ret)
return -EINVAL;
return detect_mst_link_for_all_connectors(adev->ddev);
}