On Mon, 02 Jan 2017, Madhav Chauhan <madhav.chau...@intel.com> wrote:
> From: Deepak M <m.dee...@intel.com>
>
> Dual link Z-inversion overlap field is present
> in MIPI_CTRL register unlike the older platforms,
> hence setting the same in this patch.
>
> Signed-off-by: Deepak M <m.dee...@intel.com>
> Signed-off-by: Madhav Chauhan <madhav.chau...@intel.com>
> ---
> drivers/gpu/drm/i915/intel_dsi.c | 17 +++++++++++++----
> 1 file changed, 13 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_dsi.c
> b/drivers/gpu/drm/i915/intel_dsi.c
> index 3ae70ae..95a6cad 100644
> --- a/drivers/gpu/drm/i915/intel_dsi.c
> +++ b/drivers/gpu/drm/i915/intel_dsi.c
> @@ -558,12 +558,21 @@ static void intel_dsi_port_enable(struct intel_encoder
> *encoder)
>
> if (intel_dsi->dual_link == DSI_DUAL_LINK_FRONT_BACK) {
> u32 temp;
> -
> - temp = I915_READ(VLV_CHICKEN_3);
> - temp &= ~PIXEL_OVERLAP_CNT_MASK |
> + if (IS_GEN9_LP(dev_priv)) {
> + for_each_dsi_port(port, intel_dsi->ports) {
> + temp = I915_READ(MIPI_CTRL(port));
> + temp &= ~BXT_PIXEL_OVERLAP_CNT_MASK |
> + intel_dsi->pixel_overlap <<
> + BXT_PIXEL_OVERLAP_CNT_SHIFT;
> + I915_WRITE(MIPI_CTRL(port), temp);
I think I'd do this where MIPI_CTRL is updated. If we set
->pixel_overlap to 0 for intel_dsi->dual_link !=
DSI_DUAL_LINK_FRONT_BACK in vbt_panel_init(), we can just write it
instead of checking dual_link.
BR,
Jani.
> + }
> + } else {
> + temp = I915_READ(VLV_CHICKEN_3);
> + temp &= ~PIXEL_OVERLAP_CNT_MASK |
> intel_dsi->pixel_overlap <<
> PIXEL_OVERLAP_CNT_SHIFT;
> - I915_WRITE(VLV_CHICKEN_3, temp);
> + I915_WRITE(VLV_CHICKEN_3, temp);
> + }
> }
>
> for_each_dsi_port(port, intel_dsi->ports) {
--
Jani Nikula, Intel Open Source Technology Center
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