Re: [PATCH 2/2] drm/i915/display/tgl: Bump up the plane/fb height to support 8K

["Souza, Jose" <jose.souza@intel.com>]

On Tue, 2019-07-09 at 14:47 -0700, Manasi Navare wrote:
> On TGL+, the plane height for 8K planes can be 4320, so bump it up
> To support 4320, we need to increase the number of bits used to
> read plane_height to 13 as opposed to older 12 bits.
> 
> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
> Signed-off-by: Manasi Navare <manasi.d.navare@intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_display.c | 21
> ++++++++++++++++++--
>  1 file changed, 19 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_display.c
> b/drivers/gpu/drm/i915/display/intel_display.c
> index 0d5c8af01f54..be9a54cb5ecc 100644
> --- a/drivers/gpu/drm/i915/display/intel_display.c
> +++ b/drivers/gpu/drm/i915/display/intel_display.c
> @@ -3343,6 +3343,16 @@ static int icl_max_plane_width(const struct
> drm_framebuffer *fb,
>  	return 5120;
>  }
>  
> +static int skl_max_plane_height(void)
> +{
> +	return 4096;
> +}
> +
> +static int tgl_max_plane_height(void)
> +{
> +	return 4320;
> +}
> +
>  static bool skl_check_main_ccs_coordinates(struct intel_plane_state
> *plane_state,
>  					   int main_x, int main_y, u32
> main_offset)
>  {
> @@ -3391,9 +3401,13 @@ static int skl_check_main_surface(struct
> intel_plane_state *plane_state)
>  	int w = drm_rect_width(&plane_state->base.src) >> 16;
>  	int h = drm_rect_height(&plane_state->base.src) >> 16;
>  	int max_width;
> -	int max_height = 4096;
> +	int max_height;
>  	u32 alignment, offset, aux_offset = plane_state-
> >color_plane[1].offset;
>  
> +	if (INTEL_GEN(dev_priv) >= 12)
> +		max_height = tgl_max_plane_height();
> +	else
> +		max_height = skl_max_plane_height();

Give a line between max_width block, also I would move the height after
the width.

>  	if (INTEL_GEN(dev_priv) >= 11)
>  		max_width = icl_max_plane_width(fb, 0, rotation);
>  	else if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv))
> @@ -9865,7 +9879,10 @@ skylake_get_initial_plane_config(struct
> intel_crtc *crtc,
>  	offset = I915_READ(PLANE_OFFSET(pipe, plane_id));
>  
>  	val = I915_READ(PLANE_SIZE(pipe, plane_id));
> -	fb->height = ((val >> 16) & 0xfff) + 1;
> +	if (INTEL_GEN(dev_priv) >= 12)
> +		fb->height = ((val >> 16) & 0x1fff) + 1;
> +	else
> +		fb->height = ((val >> 16) & 0xfff) + 1;
>  	fb->width = ((val >> 0) & 0x1fff) + 1;
>  
>  	val = I915_READ(PLANE_STRIDE(pipe, plane_id));
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