On Fri, 31 Jul 2015, Sivakumar Thulasimani <sivakumar.thulasimani@xxxxxxxxx> wrote:
> From: "Thulasimani,Sivakumar" <sivakumar.thulasimani@xxxxxxxxx>
>
> BPP bits defined in VBT should be used only on panels whose
> edid version is 1.3 or older. EDID version 1.4 introduced offsets
> where bpp is defined and read into display_info, hence bpp from
> VBT will be used only when bpc in display_info is zero.
>
> v2: use display_info.bpc for deciding when to use vbt_bpp (Jani)
>
> Signed-off-by: Sivakumar Thulasimani <sivakumar.thulasimani@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/intel_dp.c | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
> index 44f8a32..ae00e86 100644
> --- a/drivers/gpu/drm/i915/intel_dp.c
> +++ b/drivers/gpu/drm/i915/intel_dp.c
> @@ -1409,7 +1409,10 @@ intel_dp_compute_config(struct intel_encoder *encoder,
> * bpc in between. */
> bpp = pipe_config->pipe_bpp;
> if (is_edp(intel_dp)) {
> - if (dev_priv->vbt.edp_bpp && dev_priv->vbt.edp_bpp < bpp) {
> +
> + /* Get bpp from vbt only for panels that dont have bpp in edid */
> + if (intel_connector->base.display_info.bpc == 0 &&
> + (dev_priv->vbt.edp_bpp && dev_priv->vbt.edp_bpp < bpp)) {
The indentation seems wrong here, otherwise
Reviewed-by: Jani Nikula <jani.nikula@xxxxxxxxx>
> DRM_DEBUG_KMS("clamping bpp for eDP panel to BIOS-provided %i\n",
> dev_priv->vbt.edp_bpp);
> bpp = dev_priv->vbt.edp_bpp;
> --
> 1.7.9.5
>
--
Jani Nikula, Intel Open Source Technology Center
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