[PATCH 06/10] drm/i915/display: Add and compute scaler parameter

[Nautiyal, Ankit K]

On 3/4/2025 3:58 PM, Nemesa Garg wrote:
> Compute the values for second scaler for sharpness.
> Fill the register bits corresponding to the scaler.
>
> v1: Rename the title of patch [Ankit]
>
> Signed-off-by: Nemesa Garg <nemesa.garg at intel.com>
> ---
>   drivers/gpu/drm/i915/display/intel_casf.c |  3 ++
>   drivers/gpu/drm/i915/display/skl_scaler.c | 46 +++++++++++++++++++++++
>   drivers/gpu/drm/i915/display/skl_scaler.h |  1 +
>   3 files changed, 50 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_casf.c b/drivers/gpu/drm/i915/display/intel_casf.c
> index ff34e390c8fe..15ae555e571e 100644
> --- a/drivers/gpu/drm/i915/display/intel_casf.c
> +++ b/drivers/gpu/drm/i915/display/intel_casf.c
> @@ -8,6 +8,7 @@
>   #include "intel_casf_regs.h"
>   #include "intel_de.h"
>   #include "intel_display_types.h"
> +#include "skl_scaler.h"
>   
>   #define MAX_PIXELS_FOR_3_TAP_FILTER (1920 * 1080)
>   #define MAX_PIXELS_FOR_5_TAP_FILTER (3840 * 2160)
> @@ -211,4 +212,6 @@ void intel_casf_scaler_compute_config(struct intel_crtc_state *crtc_state)
>   void intel_casf_enable(struct intel_crtc_state *crtc_state)
>   {
>   	intel_casf_write_coeff(crtc_state);
> +
> +	skl_scaler_setup_casf(crtc_state);
>   }

Remove from this patch and add this where casf_enable is introduced later.

Otherwise looks good to me.

Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal at intel.com>


> diff --git a/drivers/gpu/drm/i915/display/skl_scaler.c b/drivers/gpu/drm/i915/display/skl_scaler.c
> index f0cf966211c9..39fc537e54f0 100644
> --- a/drivers/gpu/drm/i915/display/skl_scaler.c
> +++ b/drivers/gpu/drm/i915/display/skl_scaler.c
> @@ -133,6 +133,13 @@ static void skl_scaler_max_dst_size(struct intel_crtc *crtc,
>   	}
>   }
>   
> +#define CASF_SCALER_FILTER_SELECT \
> +	(PS_FILTER_PROGRAMMED | \
> +	PS_Y_VERT_FILTER_SELECT(0) | \
> +	PS_Y_HORZ_FILTER_SELECT(0) | \
> +	PS_UV_VERT_FILTER_SELECT(0) | \
> +	PS_UV_HORZ_FILTER_SELECT(0))
> +
>   static int
>   skl_update_scaler(struct intel_crtc_state *crtc_state, bool force_detach,
>   		  unsigned int scaler_user, int *scaler_id,
> @@ -722,6 +729,45 @@ static void skl_scaler_setup_filter(struct intel_display *display,
>   	}
>   }
>   
> +void skl_scaler_setup_casf(struct intel_crtc_state *crtc_state)
> +{
> +	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
> +	struct intel_display *display = to_intel_display(crtc);
> +	struct drm_display_mode *adjusted_mode =
> +	&crtc_state->hw.adjusted_mode;
> +	struct intel_crtc_scaler_state *scaler_state =
> +		&crtc_state->scaler_state;
> +	struct drm_rect src, dest;
> +	int id, width, height;
> +	int x = 0, y = 0;
> +	enum pipe pipe = crtc->pipe;
> +	u32 ps_ctrl;
> +
> +	width = adjusted_mode->crtc_hdisplay;
> +	height = adjusted_mode->crtc_vdisplay;
> +
> +	drm_rect_init(&dest, x, y, width, height);
> +
> +	width = drm_rect_width(&dest);
> +	height = drm_rect_height(&dest);
> +	id = scaler_state->scaler_id;
> +
> +	drm_rect_init(&src, 0, 0,
> +		      drm_rect_width(&crtc_state->pipe_src) << 16,
> +		      drm_rect_height(&crtc_state->pipe_src) << 16);
> +
> +	trace_intel_pipe_scaler_update_arm(crtc, id, x, y, width, height);
> +
> +	ps_ctrl = PS_SCALER_EN | PS_BINDING_PIPE | scaler_state->scalers[id].mode |
> +		  CASF_SCALER_FILTER_SELECT;
> +
> +	intel_de_write_fw(display, SKL_PS_CTRL(pipe, id), ps_ctrl);
> +	intel_de_write_fw(display, SKL_PS_WIN_POS(pipe, id),
> +			  PS_WIN_XPOS(x) | PS_WIN_YPOS(y));
> +	intel_de_write_fw(display, SKL_PS_WIN_SZ(pipe, id),
> +			  PS_WIN_XSIZE(width) | PS_WIN_YSIZE(height));
> +}
> +
>   void skl_pfit_enable(const struct intel_crtc_state *crtc_state)
>   {
>   	struct intel_display *display = to_intel_display(crtc_state);
> diff --git a/drivers/gpu/drm/i915/display/skl_scaler.h b/drivers/gpu/drm/i915/display/skl_scaler.h
> index 355ea15260ca..22fcfe78b506 100644
> --- a/drivers/gpu/drm/i915/display/skl_scaler.h
> +++ b/drivers/gpu/drm/i915/display/skl_scaler.h
> @@ -31,5 +31,6 @@ void skl_detach_scalers(struct intel_dsb *dsb,
>   void skl_scaler_disable(const struct intel_crtc_state *old_crtc_state);
>   
>   void skl_scaler_get_config(struct intel_crtc_state *crtc_state);
> +void skl_scaler_setup_casf(struct intel_crtc_state *crtc_state);
>   
>   #endif