On Fri, Sep 27, 2024 at 08:52:37PM +0530, Ankit Nautiyal wrote:
> Add compressed bpp limitations for ultrajoiner.
>
> v2: Fix the case for 1 pipe. (Ankit)
> v3: Refactor existing helper separately and add only ultrajoiner
> limitation. (Ville)
> v4: Separate out function for ultrajoiner_ram_bits.
>
> Signed-off-by: Ankit Nautiyal <[email protected]>
> ---
> drivers/gpu/drm/i915/display/intel_dp.c | 21 +++++++++++++++++++--
> 1 file changed, 19 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c
> b/drivers/gpu/drm/i915/display/intel_dp.c
> index a85527a55dc0..8a32d38d21bf 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> @@ -896,6 +896,16 @@ static u32 small_joiner_ram_max_bpp(struct intel_display
> *display,
> return max_bpp;
> }
>
> +static int ultrajoiner_ram_bits(void)
> +{
> + return 4 * 72 * 512;
> +}
> +
> +static u32 ultrajoiner_ram_max_bpp(u32 mode_hdisplay)
> +{
> + return ultrajoiner_ram_bits() / mode_hdisplay;
> +}
> +
> static
> u32 get_max_compressed_bpp_with_joiner(struct drm_i915_private *i915,
> u32 mode_clock, u32 mode_hdisplay,
> @@ -907,11 +917,18 @@ u32 get_max_compressed_bpp_with_joiner(struct
> drm_i915_private *i915,
> max_bpp_small_joiner_ram = small_joiner_ram_max_bpp(display,
> mode_hdisplay,
> num_joined_pipes);
>
> - if (num_joined_pipes == 2) {
> + if (num_joined_pipes > 1) {
> + u32 max_bpp;
> u32 max_bpp_bigjoiner = bigjoiner_bw_max_bpp(display,
> mode_clock,
> num_joined_pipes);
>
> - return min(max_bpp_small_joiner_ram, max_bpp_bigjoiner);
> + max_bpp = min(max_bpp_small_joiner_ram, max_bpp_bigjoiner);
> +
> + if (num_joined_pipes == 2)
> + return max_bpp;
> +
> + if (num_joined_pipes == 4)
> + return min(max_bpp,
> ultrajoiner_ram_max_bpp(mode_hdisplay));
> }
This whole thing could be simplified to just:
{
max_bpp = small_joiner_ram_max_bpp(...);
if (num_joined_pipes > 1)
max_bpp = min(max_bpp, bigjoiner_bw_max_bpp(...));
if (num_joined_pipes == 4)
max_bpp = min(max_bpp, ultrajoiner_ram_max_bpp(...));
return max_bpp;
}
but that can be done as a followup.
Reviewed-by: Ville Syrjälä <[email protected]>
>
> return max_bpp_small_joiner_ram;
> --
> 2.45.2
--
Ville Syrjälä
Intel
