Commit 029ab8ca authored by Alexandre Demers's avatar Alexandre Demers Committed by Alex Deucher
Browse files

drm/amdgpu: add some comments in DCE6 



Add some comments.

Signed-off-by: default avatarAlexandre Demers <alexandre.f.demers@gmail.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent fb92daa3

drivers/gpu/drm/amd/amdgpu/dce_v6_0.c

+16 −2
Original line number Diff line number Diff line
@@ -206,9 +206,9 @@ static void dce_v6_0_page_flip(struct amdgpu_device *adev, 
	/* update the scanout addresses */

	WREG32(mmGRPH_PRIMARY_SURFACE_ADDRESS_HIGH + amdgpu_crtc->crtc_offset,

	       upper_32_bits(crtc_base));

	/* writing to the low address triggers the update */

	WREG32(mmGRPH_PRIMARY_SURFACE_ADDRESS + amdgpu_crtc->crtc_offset,

	       (u32)crtc_base);



	/* post the write */

	RREG32(mmGRPH_PRIMARY_SURFACE_ADDRESS + amdgpu_crtc->crtc_offset);

}
@@ -218,11 +218,11 @@ static int dce_v6_0_crtc_get_scanoutpos(struct amdgpu_device *adev, int crtc, 
{

	if ((crtc < 0) || (crtc >= adev->mode_info.num_crtc))

		return -EINVAL;



	*vbl = RREG32(mmCRTC_V_BLANK_START_END + crtc_offsets[crtc]);

	*position = RREG32(mmCRTC_STATUS_POSITION + crtc_offsets[crtc]);



	return 0;



}



/**
@@ -1006,6 +1006,18 @@ static void dce_v6_0_program_watermarks(struct amdgpu_device *adev, 
}



/* watermark setup */

/**

 * dce_v6_0_line_buffer_adjust - Set up the line buffer

 *

 * @adev: amdgpu_device pointer

 * @amdgpu_crtc: the selected display controller

 * @mode: the current display mode on the selected display

 * controller

 *

 * Setup up the line buffer allocation for

 * the selected display controller (CIK).

 * Returns the line buffer size in pixels.

 */

static u32 dce_v6_0_line_buffer_adjust(struct amdgpu_device *adev,

				   struct amdgpu_crtc *amdgpu_crtc,

				   struct drm_display_mode *mode,
@@ -1386,6 +1398,8 @@ static int dce_v6_0_audio_init(struct amdgpu_device *adev) 
		adev->mode_info.audio.pin[i].connected = false;

		adev->mode_info.audio.pin[i].offset = pin_offsets[i];

		adev->mode_info.audio.pin[i].id = i;

		/* disable audio.  it will be set up later */

		/* XXX remove once we switch to ip funcs */

		dce_v6_0_audio_enable(adev, &adev->mode_info.audio.pin[i], false);

	}