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drm/radeon/kms: properly power up/down the eDP panel as needed (v4)

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The eDP panel must be powered up for aux transactions, so power it
up for detect and mode probe functions, otherwise power it up or
down based on dpms.

v2:
- only mess with eDP panel on DCE4+
- only mess with eDP panel on eDP connectors, not all DP connectors
v3:
- be extra careful to only mess with eDP panels on eDP connectors
v4:
- avoid possible null derefernce if a connector has not been
assigned to the encoder

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Alex Deucher
2010-11-17 02:54:42 -05:00
committed by Dave Airlie
parent c7a71fc761
commit 8b834852d7
3 changed files with 70 additions and 0 deletions
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50
drivers/gpu/drm/radeon/radeon_encoders.c
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@@ -990,6 +990,36 @@ atombios_dig_transmitter_setup(struct drm_encoder *encoder, int action, uint8_t
atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args);
}
void
atombios_set_edp_panel_power(struct drm_connector *connector, int action)
{
struct radeon_connector *radeon_connector = to_radeon_connector(connector);
struct drm_device *dev = radeon_connector->base.dev;
struct radeon_device *rdev = dev->dev_private;
union dig_transmitter_control args;
int index = GetIndexIntoMasterTable(COMMAND, UNIPHYTransmitterControl);
uint8_t frev, crev;
if (connector->connector_type != DRM_MODE_CONNECTOR_eDP)
return;
if (!ASIC_IS_DCE4(rdev))
return;
if ((action != ATOM_TRANSMITTER_ACTION_POWER_ON) ||
(action != ATOM_TRANSMITTER_ACTION_POWER_OFF))
return;
if (!atom_parse_cmd_header(rdev->mode_info.atom_context, index, &frev, &crev))
return;
memset(&args, 0, sizeof(args));
args.v1.ucAction = action;
atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args);
}
static void
atombios_yuv_setup(struct drm_encoder *encoder, bool enable)
{
@@ -1094,6 +1124,15 @@ radeon_atom_encoder_dpms(struct drm_encoder *encoder, int mode)
if (atombios_get_encoder_mode(encoder) == ATOM_ENCODER_MODE_DP) {
struct drm_connector *connector = radeon_get_connector_for_encoder(encoder);
if (connector &&
(connector->connector_type == DRM_MODE_CONNECTOR_eDP)) {
struct radeon_connector *radeon_connector = to_radeon_connector(connector);
struct radeon_connector_atom_dig *radeon_dig_connector =
radeon_connector->con_priv;
atombios_set_edp_panel_power(connector,
ATOM_TRANSMITTER_ACTION_POWER_ON);
radeon_dig_connector->edp_on = true;
}
dp_link_train(encoder, connector);
if (ASIC_IS_DCE4(rdev))
atombios_dig_encoder_setup(encoder, ATOM_ENCODER_CMD_DP_VIDEO_ON);
@@ -1106,8 +1145,19 @@ radeon_atom_encoder_dpms(struct drm_encoder *encoder, int mode)
case DRM_MODE_DPMS_OFF:
atombios_dig_transmitter_setup(encoder, ATOM_TRANSMITTER_ACTION_DISABLE_OUTPUT, 0, 0);
if (atombios_get_encoder_mode(encoder) == ATOM_ENCODER_MODE_DP) {
struct drm_connector *connector = radeon_get_connector_for_encoder(encoder);
if (ASIC_IS_DCE4(rdev))
atombios_dig_encoder_setup(encoder, ATOM_ENCODER_CMD_DP_VIDEO_OFF);
if (connector &&
(connector->connector_type == DRM_MODE_CONNECTOR_eDP)) {
struct radeon_connector *radeon_connector = to_radeon_connector(connector);
struct radeon_connector_atom_dig *radeon_dig_connector =
radeon_connector->con_priv;
atombios_set_edp_panel_power(connector,
ATOM_TRANSMITTER_ACTION_POWER_OFF);
radeon_dig_connector->edp_on = false;
}
}
if (radeon_encoder->devices & (ATOM_DEVICE_LCD_SUPPORT))
atombios_dig_transmitter_setup(encoder, ATOM_TRANSMITTER_ACTION_LCD_BLOFF, 0, 0);