* [PATCH] drm/amdgpu: Junk code
@ 2022-04-04 23:33 Grigory Vasilyev
2022-04-05 13:56 ` Alex Deucher
0 siblings, 1 reply; 2+ messages in thread
From: Grigory Vasilyev @ 2022-04-04 23:33 UTC (permalink / raw)
To: Rodrigo Siqueira, Melissa Wen
Cc: Grigory Vasilyev, Alex Deucher, Christian König, Pan,
Xinhui, David Airlie, Daniel Vetter, Harry Wentland,
Claudio Suarez, amd-gfx, dri-devel, linux-kernel
Variable igp_lane_info always is 0. 0 & any value = 0 and false.
In this way, all сonditional statements will false.
Therefore, it is not clear what this code does.
Signed-off-by: Grigory Vasilyev <h0tc0d3@gmail.com>
---
.../gpu/drm/amd/amdgpu/atombios_encoders.c | 21 -------------------
1 file changed, 21 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/atombios_encoders.c b/drivers/gpu/drm/amd/amdgpu/atombios_encoders.c
index 2b0cc793291c..100bad2f5901 100644
--- a/drivers/gpu/drm/amd/amdgpu/atombios_encoders.c
+++ b/drivers/gpu/drm/amd/amdgpu/atombios_encoders.c
@@ -769,7 +769,6 @@ amdgpu_atombios_encoder_setup_dig_transmitter(struct drm_encoder *encoder, int a
int dp_clock = 0;
int dp_lane_count = 0;
int connector_object_id = 0;
- int igp_lane_info = 0;
int dig_encoder = dig->dig_encoder;
int hpd_id = AMDGPU_HPD_NONE;
@@ -852,26 +851,6 @@ amdgpu_atombios_encoder_setup_dig_transmitter(struct drm_encoder *encoder, int a
else
args.v1.ucConfig |= ATOM_TRANSMITTER_CONFIG_DIG1_ENCODER;
- if ((adev->flags & AMD_IS_APU) &&
- (amdgpu_encoder->encoder_id == ENCODER_OBJECT_ID_INTERNAL_UNIPHY)) {
- if (is_dp ||
- !amdgpu_dig_monitor_is_duallink(encoder, amdgpu_encoder->pixel_clock)) {
- if (igp_lane_info & 0x1)
- args.v1.ucConfig |= ATOM_TRANSMITTER_CONFIG_LANE_0_3;
- else if (igp_lane_info & 0x2)
- args.v1.ucConfig |= ATOM_TRANSMITTER_CONFIG_LANE_4_7;
- else if (igp_lane_info & 0x4)
- args.v1.ucConfig |= ATOM_TRANSMITTER_CONFIG_LANE_8_11;
- else if (igp_lane_info & 0x8)
- args.v1.ucConfig |= ATOM_TRANSMITTER_CONFIG_LANE_12_15;
- } else {
- if (igp_lane_info & 0x3)
- args.v1.ucConfig |= ATOM_TRANSMITTER_CONFIG_LANE_0_7;
- else if (igp_lane_info & 0xc)
- args.v1.ucConfig |= ATOM_TRANSMITTER_CONFIG_LANE_8_15;
- }
- }
-
if (dig->linkb)
args.v1.ucConfig |= ATOM_TRANSMITTER_CONFIG_LINKB;
else
--
2.35.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] drm/amdgpu: Junk code
2022-04-04 23:33 [PATCH] drm/amdgpu: Junk code Grigory Vasilyev
@ 2022-04-05 13:56 ` Alex Deucher
0 siblings, 0 replies; 2+ messages in thread
From: Alex Deucher @ 2022-04-05 13:56 UTC (permalink / raw)
To: Grigory Vasilyev
Cc: Rodrigo Siqueira, Melissa Wen, Pan, Xinhui, LKML, amd-gfx list,
David Airlie, Claudio Suarez, Maling list - DRI developers,
Alex Deucher, Christian König
On Tue, Apr 5, 2022 at 5:07 AM Grigory Vasilyev <h0tc0d3@gmail.com> wrote:
>
> Variable igp_lane_info always is 0. 0 & any value = 0 and false.
> In this way, all сonditional statements will false.
> Therefore, it is not clear what this code does.
It was leftover from when the code was ported from radeon. The igp
lane info was available from the vbios on older APUs. It's not
relevant on any asics supported by amdgpu. I've applied the patch and
clarified the commit message.
Thanks,
Alex
>
> Signed-off-by: Grigory Vasilyev <h0tc0d3@gmail.com>
> ---
> .../gpu/drm/amd/amdgpu/atombios_encoders.c | 21 -------------------
> 1 file changed, 21 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/atombios_encoders.c b/drivers/gpu/drm/amd/amdgpu/atombios_encoders.c
> index 2b0cc793291c..100bad2f5901 100644
> --- a/drivers/gpu/drm/amd/amdgpu/atombios_encoders.c
> +++ b/drivers/gpu/drm/amd/amdgpu/atombios_encoders.c
> @@ -769,7 +769,6 @@ amdgpu_atombios_encoder_setup_dig_transmitter(struct drm_encoder *encoder, int a
> int dp_clock = 0;
> int dp_lane_count = 0;
> int connector_object_id = 0;
> - int igp_lane_info = 0;
> int dig_encoder = dig->dig_encoder;
> int hpd_id = AMDGPU_HPD_NONE;
>
> @@ -852,26 +851,6 @@ amdgpu_atombios_encoder_setup_dig_transmitter(struct drm_encoder *encoder, int a
> else
> args.v1.ucConfig |= ATOM_TRANSMITTER_CONFIG_DIG1_ENCODER;
>
> - if ((adev->flags & AMD_IS_APU) &&
> - (amdgpu_encoder->encoder_id == ENCODER_OBJECT_ID_INTERNAL_UNIPHY)) {
> - if (is_dp ||
> - !amdgpu_dig_monitor_is_duallink(encoder, amdgpu_encoder->pixel_clock)) {
> - if (igp_lane_info & 0x1)
> - args.v1.ucConfig |= ATOM_TRANSMITTER_CONFIG_LANE_0_3;
> - else if (igp_lane_info & 0x2)
> - args.v1.ucConfig |= ATOM_TRANSMITTER_CONFIG_LANE_4_7;
> - else if (igp_lane_info & 0x4)
> - args.v1.ucConfig |= ATOM_TRANSMITTER_CONFIG_LANE_8_11;
> - else if (igp_lane_info & 0x8)
> - args.v1.ucConfig |= ATOM_TRANSMITTER_CONFIG_LANE_12_15;
> - } else {
> - if (igp_lane_info & 0x3)
> - args.v1.ucConfig |= ATOM_TRANSMITTER_CONFIG_LANE_0_7;
> - else if (igp_lane_info & 0xc)
> - args.v1.ucConfig |= ATOM_TRANSMITTER_CONFIG_LANE_8_15;
> - }
> - }
> -
> if (dig->linkb)
> args.v1.ucConfig |= ATOM_TRANSMITTER_CONFIG_LINKB;
> else
> --
> 2.35.1
>
^ permalink raw reply [flat|nested] 2+ messages in thread
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