drm/i915/display: Add and compute scaler parameter

Compute the values for second scaler for sharpness.
Fill the register bits corresponding to the scaler.

v1: Rename the title of patch [Ankit]
v2: Remove setup_casf from here[Ankit]
v3: Add skl_scaler_setup_casf in casf_enable

Signed-off-by: Nemesa Garg <nemesa.garg@intel.com>
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Link: https://patch.msgid.link/20251028120747.3027332-7-ankit.k.nautiyal@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>

3 files changed, 54 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/display/intel_casf.c b/drivers/gpu/drm/i915/display/intel_casf.c
index ee24e5957d3d..cdf1adc27afd 100644
--- a/drivers/gpu/drm/i915/display/intel_casf.c
+++ b/drivers/gpu/drm/i915/display/intel_casf.c
@@ -9,6 +9,7 @@
 #include "intel_de.h"
 #include "intel_display_regs.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)
@@ -265,6 +266,8 @@ void intel_casf_enable(struct intel_crtc_state *crtc_state)
 	sharpness_ctl |= crtc_state->hw.casf_params.win_size;
 
 	intel_de_write(display, SHARPNESS_CTL(crtc->pipe), sharpness_ctl);
+
+	skl_scaler_setup_casf(crtc_state);
 }
 
 void intel_casf_disable(const struct intel_crtc_state *crtc_state)
@@ -272,5 +275,8 @@ void intel_casf_disable(const struct intel_crtc_state *crtc_state)
 	struct intel_display *display = to_intel_display(crtc_state);
 	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
 
+	intel_de_write(display, SKL_PS_CTRL(crtc->pipe, 1), 0);
+	intel_de_write(display, SKL_PS_WIN_POS(crtc->pipe, 1), 0);
 	intel_de_write(display, SHARPNESS_CTL(crtc->pipe), 0);
+	intel_de_write(display, SKL_PS_WIN_SZ(crtc->pipe, 1), 0);
 }
diff --git a/drivers/gpu/drm/i915/display/skl_scaler.c b/drivers/gpu/drm/i915/display/skl_scaler.c
index dbe1c4a63ec7..dbb810c0474c 100644
--- a/drivers/gpu/drm/i915/display/skl_scaler.c
+++ b/drivers/gpu/drm/i915/display/skl_scaler.c
@@ -739,6 +739,52 @@ static void skl_scaler_setup_filter(struct intel_display *display,
 	}
 }
 
+#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))
+
+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 5deabca909e6..7e8d819c019d 100644
--- a/drivers/gpu/drm/i915/display/skl_scaler.h
+++ b/drivers/gpu/drm/i915/display/skl_scaler.h
@@ -36,6 +36,8 @@ 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);
+
 enum drm_mode_status
 skl_scaler_mode_valid(struct intel_display *display,
 		      const struct drm_display_mode *mode,