Re: [GLK MIPI DSI V2 9/9] drm/915: Parsing the missed out DTD fields from the VBT

[Jani Nikula <jani.nikula@intel.com>]

On Thu, 15 Dec 2016, Madhav Chauhan <madhav.chauhan@intel.com> wrote:
> From: Vincente Tsou <vincente.tsou@intel.com>
>
> The upper bits of the vsync width, vsync offset and hsync width
> were not parsed form the VBT. Parse these fields in this patch.
>
> Signed-off-by: Madhav Chauhan <madhav.chauhan@intel.com>
> Signed-off-by: Vincente Tsou <vincente.tsou@intel.com>

The author Signed-off-by should be first, others are added below.

> ---
>  drivers/gpu/drm/i915/intel_bios.c     | 8 +++++---
>  drivers/gpu/drm/i915/intel_vbt_defs.h | 6 ++++--
>  2 files changed, 9 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios.c
> index eaade27..e1d014b 100644
> --- a/drivers/gpu/drm/i915/intel_bios.c
> +++ b/drivers/gpu/drm/i915/intel_bios.c
> @@ -114,16 +114,18 @@ static u32 get_blocksize(const void *block_data)
>  	panel_fixed_mode->hsync_start = panel_fixed_mode->hdisplay +
>  		((dvo_timing->hsync_off_hi << 8) | dvo_timing->hsync_off_lo);
>  	panel_fixed_mode->hsync_end = panel_fixed_mode->hsync_start +
> -		dvo_timing->hsync_pulse_width;
> +		((dvo_timing->hsync_pulse_width_hi << 8) |
> +				    dvo_timing->hsync_pulse_width);
>  	panel_fixed_mode->htotal = panel_fixed_mode->hdisplay +
>  		((dvo_timing->hblank_hi << 8) | dvo_timing->hblank_lo);
>  
>  	panel_fixed_mode->vdisplay = (dvo_timing->vactive_hi << 8) |
>  		dvo_timing->vactive_lo;
>  	panel_fixed_mode->vsync_start = panel_fixed_mode->vdisplay +
> -		dvo_timing->vsync_off;
> +		((dvo_timing->vsync_off_hi << 4) | dvo_timing->vsync_off);
>  	panel_fixed_mode->vsync_end = panel_fixed_mode->vsync_start +
> -		dvo_timing->vsync_pulse_width;
> +		((dvo_timing->vsync_pulse_width_hi << 4) |
> +				    dvo_timing->vsync_pulse_width);

The indentation for the above changes seem to be off.

>  	panel_fixed_mode->vtotal = panel_fixed_mode->vdisplay +
>  		((dvo_timing->vblank_hi << 8) | dvo_timing->vblank_lo);
>  	panel_fixed_mode->clock = dvo_timing->clock * 10;
> diff --git a/drivers/gpu/drm/i915/intel_vbt_defs.h b/drivers/gpu/drm/i915/intel_vbt_defs.h
> index 8886cab1..bf9d2d3 100644
> --- a/drivers/gpu/drm/i915/intel_vbt_defs.h
> +++ b/drivers/gpu/drm/i915/intel_vbt_defs.h
> @@ -402,7 +402,9 @@ struct lvds_dvo_timing {
>  	u8 hsync_pulse_width;
>  	u8 vsync_pulse_width:4;
>  	u8 vsync_off:4;
> -	u8 rsvd0:6;
> +	u8 vsync_pulse_width_hi:2;
> +	u8 vsync_off_hi:2;
> +	u8 hsync_pulse_width_hi:2;

Please rename the lo counterparts of these fields to have _lo suffix,
for consistency with other hi/lo split fields. With that, the compiler
will help you in making sure you found all the places you need to
fix. ;)

>  	u8 hsync_off_hi:2;
>  	u8 himage_lo;
>  	u8 vimage_lo;
> @@ -414,7 +416,7 @@ struct lvds_dvo_timing {
>  	u8 digital:2;
>  	u8 vsync_positive:1;
>  	u8 hsync_positive:1;
> -	u8 rsvd2:1;
> +	u8 interlaced:1;

This should be non_interlaced, as that's how the bit is defined.

Otherwise, seems like a good find.

BR,
Jani.

>  } __packed;
>  
>  struct lvds_pnp_id {

-- 
Jani Nikula, Intel Open Source Technology Center
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx