Reviewed-by: Mika Kahola <[email protected]>

On Tue, 2016-05-31 at 12:08 +0300, [email protected] wrote:
> From: Ville Syrjälä <[email protected]>
> 
> The VBT has these mysterious H/V image sizes as part of the display
> timings. Looking at some dumps those appear to be the physical
> dimensions in mm. Which makes sense since the timing descriptor matches
> the format used by EDID detailed timing descriptor, which defines these
> as "H/V Addressable Video Image Size in mm".
> 
> So let's use that information from the panel fixed mode to get the
> physical dimensions for LVDS/eDP/DSI displays. And with that we can
> fill out the display_info so that userspace can get at it via
> GetConnector.
> 
> v2: Use (hi<<8)|lo instead of broken (hi<<4)+lo
>     Handle LVDS and eDP too
> 
> Cc: Stephen Just <[email protected]>
> Tested-by: Stephen Just <[email protected]> (v1)
> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=96255
> Signed-off-by: Ville Syrjälä <[email protected]>
> ---
>  drivers/gpu/drm/i915/intel_bios.c     | 5 +++++
>  drivers/gpu/drm/i915/intel_dp.c       | 5 ++++-
>  drivers/gpu/drm/i915/intel_dsi.c      | 3 +++
>  drivers/gpu/drm/i915/intel_lvds.c     | 2 ++
>  drivers/gpu/drm/i915/intel_vbt_defs.h | 7 ++++---
>  5 files changed, 18 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_bios.c 
> b/drivers/gpu/drm/i915/intel_bios.c
> index 624e755e451f..2ddc469170cd 100644
> --- a/drivers/gpu/drm/i915/intel_bios.c
> +++ b/drivers/gpu/drm/i915/intel_bios.c
> @@ -139,6 +139,11 @@ fill_detail_timing_data(struct drm_display_mode 
> *panel_fixed_mode,
>       else
>               panel_fixed_mode->flags |= DRM_MODE_FLAG_NVSYNC;
>  
> +     panel_fixed_mode->width_mm = (dvo_timing->himage_hi << 8) |
> +             dvo_timing->himage_lo;
> +     panel_fixed_mode->height_mm = (dvo_timing->vimage_hi << 8) |
> +             dvo_timing->vimage_lo;
> +
>       /* Some VBTs have bogus h/vtotal values */
>       if (panel_fixed_mode->hsync_end > panel_fixed_mode->htotal)
>               panel_fixed_mode->htotal = panel_fixed_mode->hsync_end + 1;
> diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
> index 096acbf04003..46f62beaf4fb 100644
> --- a/drivers/gpu/drm/i915/intel_dp.c
> +++ b/drivers/gpu/drm/i915/intel_dp.c
> @@ -5370,8 +5370,11 @@ static bool intel_edp_init_connector(struct intel_dp 
> *intel_dp,
>       if (!fixed_mode && dev_priv->vbt.lfp_lvds_vbt_mode) {
>               fixed_mode = drm_mode_duplicate(dev,
>                                       dev_priv->vbt.lfp_lvds_vbt_mode);
> -             if (fixed_mode)
> +             if (fixed_mode) {
>                       fixed_mode->type |= DRM_MODE_TYPE_PREFERRED;
> +                     connector->display_info.width_mm = fixed_mode->width_mm;
> +                     connector->display_info.height_mm = 
> fixed_mode->height_mm;
> +             }
>       }
>       mutex_unlock(&dev->mode_config.mutex);
>  
> diff --git a/drivers/gpu/drm/i915/intel_dsi.c 
> b/drivers/gpu/drm/i915/intel_dsi.c
> index cbe2537f26f4..c70132aa91d5 100644
> --- a/drivers/gpu/drm/i915/intel_dsi.c
> +++ b/drivers/gpu/drm/i915/intel_dsi.c
> @@ -1578,6 +1578,9 @@ void intel_dsi_init(struct drm_device *dev)
>               goto err;
>       }
>  
> +     connector->display_info.width_mm = fixed_mode->width_mm;
> +     connector->display_info.height_mm = fixed_mode->height_mm;
> +
>       intel_panel_init(&intel_connector->panel, fixed_mode, NULL);
>  
>       intel_dsi_add_properties(intel_connector);
> diff --git a/drivers/gpu/drm/i915/intel_lvds.c 
> b/drivers/gpu/drm/i915/intel_lvds.c
> index 56eb3bdcdb5c..62eaa895fe5b 100644
> --- a/drivers/gpu/drm/i915/intel_lvds.c
> +++ b/drivers/gpu/drm/i915/intel_lvds.c
> @@ -1082,6 +1082,8 @@ void intel_lvds_init(struct drm_device *dev)
>               fixed_mode = drm_mode_duplicate(dev, 
> dev_priv->vbt.lfp_lvds_vbt_mode);
>               if (fixed_mode) {
>                       fixed_mode->type |= DRM_MODE_TYPE_PREFERRED;
> +                     connector->display_info.width_mm = fixed_mode->width_mm;
> +                     connector->display_info.height_mm = 
> fixed_mode->height_mm;
>                       goto out;
>               }
>       }
> diff --git a/drivers/gpu/drm/i915/intel_vbt_defs.h 
> b/drivers/gpu/drm/i915/intel_vbt_defs.h
> index 4f9799f025a9..68db9621f1f0 100644
> --- a/drivers/gpu/drm/i915/intel_vbt_defs.h
> +++ b/drivers/gpu/drm/i915/intel_vbt_defs.h
> @@ -403,9 +403,10 @@ struct lvds_dvo_timing {
>       u8 vsync_off:4;
>       u8 rsvd0:6;
>       u8 hsync_off_hi:2;
> -     u8 h_image;
> -     u8 v_image;
> -     u8 max_hv;
> +     u8 himage_lo;
> +     u8 vimage_lo;
> +     u8 vimage_hi:4;
> +     u8 himage_hi:4;
>       u8 h_border;
>       u8 v_border;
>       u8 rsvd1:3;

-- 
Mika Kahola - Intel OTC

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