> -----Original Message-----
> From: Nautiyal, Ankit K <[email protected]>
> Sent: Thursday, October 3, 2024 4:14 PM
> To: [email protected]
> Cc: [email protected]; Kandpal, Suraj
> <[email protected]>; [email protected]
> Subject: [PATCH 5/7] drm/i915/dp: Refactor pipe_bpp limits with dsc
>
> With DSC there are additional limits for pipe_bpp. Currently these are
> scattered in different places.
> Instead set the limits->pipe.max/min_bpp in one place and use them
> wherever required.
>
> Signed-off-by: Ankit Nautiyal <[email protected]>
LGTM,
Reviewed-by: Suraj Kandpal <[email protected]>
> ---
> drivers/gpu/drm/i915/display/intel_dp.c | 43 ++++++++++---------------
> 1 file changed, 17 insertions(+), 26 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c
> b/drivers/gpu/drm/i915/display/intel_dp.c
> index 46f3b680afe9..55ee438a4fec 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> @@ -2166,21 +2166,11 @@ int intel_dp_dsc_min_src_input_bpc(struct
> intel_display *display) }
>
> static
> -bool is_dsc_pipe_bpp_sufficient(struct drm_i915_private *i915,
> - struct link_config_limits *limits,
> +bool is_dsc_pipe_bpp_sufficient(struct link_config_limits *limits,
> int pipe_bpp)
> {
> - struct intel_display *display = to_intel_display(&i915->drm);
> - int dsc_max_bpc, dsc_min_bpc, dsc_max_pipe_bpp,
> dsc_min_pipe_bpp;
> -
> - dsc_max_bpc = intel_dp_dsc_max_src_input_bpc(display);
> - dsc_min_bpc = intel_dp_dsc_min_src_input_bpc(display);
> -
> - dsc_max_pipe_bpp = min(dsc_max_bpc * 3, limits->pipe.max_bpp);
> - dsc_min_pipe_bpp = max(dsc_min_bpc * 3, limits->pipe.min_bpp);
> -
> - return pipe_bpp >= dsc_min_pipe_bpp &&
> - pipe_bpp <= dsc_max_pipe_bpp;
> + return pipe_bpp >= limits->pipe.min_bpp &&
> + pipe_bpp <= limits->pipe.max_bpp;
> }
>
> static
> @@ -2195,7 +2185,7 @@ int intel_dp_force_dsc_pipe_bpp(struct intel_dp
> *intel_dp,
>
> forced_bpp = intel_dp->force_dsc_bpc * 3;
>
> - if (is_dsc_pipe_bpp_sufficient(i915, limits, forced_bpp)) {
> + if (is_dsc_pipe_bpp_sufficient(limits, forced_bpp)) {
> drm_dbg_kms(&i915->drm, "Input DSC BPC forced to %d\n",
> intel_dp->force_dsc_bpc);
> return forced_bpp;
> }
> @@ -2212,11 +2202,10 @@ static int
> intel_dp_dsc_compute_pipe_bpp(struct intel_dp *intel_dp,
> struct link_config_limits *limits,
> int timeslots)
> {
> - struct intel_display *display = to_intel_display(intel_dp);
> const struct intel_connector *connector =
> to_intel_connector(conn_state->connector);
> - int dsc_max_bpc, dsc_max_bpp;
> - int dsc_min_bpc, dsc_min_bpp;
> + int dsc_max_bpp;
> + int dsc_min_bpp;
> u8 dsc_bpc[3] = {};
> int forced_bpp, pipe_bpp;
> int num_bpc, i, ret;
> @@ -2232,14 +2221,8 @@ static int intel_dp_dsc_compute_pipe_bpp(struct
> intel_dp *intel_dp,
> }
> }
>
> - dsc_max_bpc = intel_dp_dsc_max_src_input_bpc(display);
> - if (!dsc_max_bpc)
> - return -EINVAL;
> -
> - dsc_max_bpp = min(dsc_max_bpc * 3, limits->pipe.max_bpp);
> -
> - dsc_min_bpc = intel_dp_dsc_min_src_input_bpc(display);
> - dsc_min_bpp = max(dsc_min_bpc * 3, limits->pipe.min_bpp);
> + dsc_max_bpp = limits->pipe.max_bpp;
> + dsc_min_bpp = limits->pipe.min_bpp;
>
> /*
> * Get the maximum DSC bpc that will be supported by any valid
> @@ -2284,7 +2267,7 @@ static int intel_edp_dsc_compute_pipe_bpp(struct
> intel_dp *intel_dp,
>
> /* For eDP use max bpp that can be supported with DSC. */
> pipe_bpp = intel_dp_dsc_compute_max_bpp(connector,
> max_bpc);
> - if (!is_dsc_pipe_bpp_sufficient(i915, limits, pipe_bpp)) {
> + if (!is_dsc_pipe_bpp_sufficient(limits, pipe_bpp)) {
> drm_dbg_kms(&i915->drm,
> "Computed BPC is not in DSC BPC
> limits\n");
> return -EINVAL;
> @@ -2502,6 +2485,14 @@ intel_dp_compute_config_limits(struct intel_dp
> *intel_dp,
> limits->pipe.min_bpp = intel_dp_min_bpp(crtc_state-
> >output_format);
> limits->pipe.max_bpp = intel_dp_max_bpp(intel_dp, crtc_state,
>
> respect_downstream_limits);
> + if (dsc) {
> + struct intel_display *display = to_intel_display(intel_dp);
> + int dsc_min_bpc = intel_dp_dsc_min_src_input_bpc(display);
> + int dsc_max_bpc =
> intel_dp_dsc_max_src_input_bpc(display);
> +
> + limits->pipe.max_bpp = min(limits->pipe.max_bpp,
> dsc_max_bpc * 3);
> + limits->pipe.min_bpp = max(limits->pipe.min_bpp,
> dsc_min_bpc * 3);
> + }
>
> if (intel_dp->use_max_params) {
> /*
> --
> 2.45.2
