[PATCH] drm/radeon/kms: properly set panel mode for eDP

[Alex Deucher]

Looks like this patch got missed.  Dave can you add it and CC: stable?

Alex

On Wed, May 25, 2011 at 2:02 PM, Alex Deucher <alexdeucher at gmail.com> wrote:
> This should make eDP more reliable.
>
> Signed-off-by: Alex Deucher <alexdeucher at gmail.com>
> ---
>  drivers/gpu/drm/radeon/atombios_dp.c |   11 +++++++++++
>  include/drm/drm_dp_helper.h          |    3 +++
>  2 files changed, 14 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/gpu/drm/radeon/atombios_dp.c b/drivers/gpu/drm/radeon/atombios_dp.c
> index 8c0f9e3..892b88d 100644
> --- a/drivers/gpu/drm/radeon/atombios_dp.c
> +++ b/drivers/gpu/drm/radeon/atombios_dp.c
> @@ -543,6 +543,7 @@ static void radeon_dp_set_panel_mode(struct drm_encoder *encoder,
>  {
>        struct drm_device *dev = encoder->dev;
>        struct radeon_device *rdev = dev->dev_private;
> +       struct radeon_connector *radeon_connector = to_radeon_connector(connector);
>        int panel_mode = DP_PANEL_MODE_EXTERNAL_DP_MODE;
>
>        if (!ASIC_IS_DCE4(rdev))
> @@ -550,10 +551,20 @@ static void radeon_dp_set_panel_mode(struct drm_encoder *encoder,
>
>        if (radeon_connector_encoder_is_dp_bridge(connector))
>                panel_mode = DP_PANEL_MODE_INTERNAL_DP1_MODE;
> +       else if (connector->connector_type == DRM_MODE_CONNECTOR_eDP) {
> +               u8 tmp = radeon_read_dpcd_reg(radeon_connector, DP_EDP_CONFIGURATION_CAP);
> +               if (tmp & 1)
> +                       panel_mode = DP_PANEL_MODE_INTERNAL_DP2_MODE;
> +       }
>
>        atombios_dig_encoder_setup(encoder,
>                                   ATOM_ENCODER_CMD_SETUP_PANEL_MODE,
>                                   panel_mode);
> +
> +       if ((connector->connector_type == DRM_MODE_CONNECTOR_eDP) &&
> +           (panel_mode == DP_PANEL_MODE_INTERNAL_DP2_MODE)) {
> +               radeon_write_dpcd_reg(radeon_connector, DP_EDP_CONFIGURATION_SET, 1);
> +       }
>  }
>
>  void radeon_dp_set_link_config(struct drm_connector *connector,
> diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
> index 91567bb..03eb1d6 100644
> --- a/include/drm/drm_dp_helper.h
> +++ b/include/drm/drm_dp_helper.h
> @@ -72,6 +72,7 @@
>
>  #define DP_MAIN_LINK_CHANNEL_CODING         0x006
>
> +#define DP_EDP_CONFIGURATION_CAP            0x00d
>  #define DP_TRAINING_AUX_RD_INTERVAL         0x00e
>
>  /* link configuration */
> @@ -133,6 +134,8 @@
>  #define DP_MAIN_LINK_CHANNEL_CODING_SET            0x108
>  # define DP_SET_ANSI_8B10B                 (1 << 0)
>
> +#define DP_EDP_CONFIGURATION_SET            0x10a
> +
>  #define DP_LANE0_1_STATUS                  0x202
>  #define DP_LANE2_3_STATUS                  0x203
>  # define DP_LANE_CR_DONE                   (1 << 0)
> --
> 1.7.4
>
>