drm/i915: Add hw.pipe_mode to allow bigjoiner pipe/transcoder split

With bigjoiner, there will be 2 pipes driving 2 halves of 1 transcoder,
because of this, we need a pipe_mode for various calculations, including
for example watermarks, plane clipping, etc.

v10:
* remove redundant pipe_mode assignment (Ville)
v9:
* pipe_mode in state dump nd state check (Ville)
v8:
* Add pipe_mode in readout in verify_crtc_state (Ville)
v7:
* Remove redundant comment (Ville)
* Just keep mode instead of pipe_mode (Ville)
v6:
* renaming in separate function, only pipe_mode here (Ville)
* Add description (Maarten)
v5:
* Rebase (Manasi)
v4:
* Manual rebase (Manasi)
v3:
* Change state to crtc_state, fix rebase err  (Manasi)
v2:
* Manual Rebase (Manasi)

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Manasi Navare <manasi.d.navare@intel.com>
Reviewed-by: Animesh Manna <animesh.manna@intel.com>
[vsyrjala:
* Fix state checker
* Fix state dump
* Use pipe_mode for linetime watermarks
* Make sure pipe_mode normal timings are correct since the
  silly ddb code uses them
* Drop the redundant pipe_mode copies from intel_modeset_pipe_config()
  and intel_crtc_copy_uapi_to_hw_state()
* Use drm_mode_copy() all over]
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201112191718.16683-7-ville.syrjala@linux.intel.com

drivers/gpu/drm/i915/display/intel_display.c

@@ -6073,18 +6073,16 @@ skl_update_scaler(struct intel_crtc_state *crtc_state, bool force_detach,
 
 static int skl_update_scaler_crtc(struct intel_crtc_state *crtc_state)
 {
-	const struct drm_display_mode *adjusted_mode =
-		&crtc_state->hw.adjusted_mode;
+	const struct drm_display_mode *pipe_mode = &crtc_state->hw.pipe_mode;
 	int width, height;
 
 	if (crtc_state->pch_pfit.enabled) {
 		width = drm_rect_width(&crtc_state->pch_pfit.dst);
 		height = drm_rect_height(&crtc_state->pch_pfit.dst);
 	} else {
-		width = adjusted_mode->crtc_hdisplay;
-		height = adjusted_mode->crtc_vdisplay;
+		width = pipe_mode->crtc_hdisplay;
+		height = pipe_mode->crtc_vdisplay;
 	}
-
 	return skl_update_scaler(crtc_state, !crtc_state->hw.active,
 				 SKL_CRTC_INDEX,
 				 &crtc_state->scaler_state.scaler_id,
@@ -8098,7 +8096,7 @@ static bool intel_crtc_supports_double_wide(const struct intel_crtc *crtc)
 
 static u32 ilk_pipe_pixel_rate(const struct intel_crtc_state *crtc_state)
 {
-	u32 pixel_rate = crtc_state->hw.adjusted_mode.crtc_clock;
+	u32 pixel_rate = crtc_state->hw.pipe_mode.crtc_clock;
 	unsigned int pipe_w, pipe_h, pfit_w, pfit_h;
 
 	/*
@@ -8156,7 +8154,7 @@ static void intel_crtc_compute_pixel_rate(struct intel_crtc_state *crtc_state)
 	if (HAS_GMCH(dev_priv))
 		/* FIXME calculate proper pipe pixel rate for GMCH pfit */
 		crtc_state->pixel_rate =
-			crtc_state->hw.adjusted_mode.crtc_clock;
+			crtc_state->hw.pipe_mode.crtc_clock;
 	else
 		crtc_state->pixel_rate =
 			ilk_pipe_pixel_rate(crtc_state);
@@ -8165,8 +8163,12 @@ static void intel_crtc_compute_pixel_rate(struct intel_crtc_state *crtc_state)
 static void intel_crtc_readout_derived_state(struct intel_crtc_state *crtc_state)
 {
 	struct drm_display_mode *mode = &crtc_state->hw.mode;
+	struct drm_display_mode *pipe_mode = &crtc_state->hw.pipe_mode;
 	struct drm_display_mode *adjusted_mode = &crtc_state->hw.adjusted_mode;
 
+	drm_mode_copy(pipe_mode, adjusted_mode);
+
+	intel_mode_from_crtc_timings(pipe_mode, pipe_mode);
 	intel_mode_from_crtc_timings(adjusted_mode, adjusted_mode);
 
 	intel_crtc_compute_pixel_rate(crtc_state);
@@ -8188,9 +8190,12 @@ static int intel_crtc_compute_config(struct intel_crtc *crtc,
 				     struct intel_crtc_state *pipe_config)
 {
 	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
-	const struct drm_display_mode *adjusted_mode = &pipe_config->hw.adjusted_mode;
+	struct drm_display_mode *pipe_mode = &pipe_config->hw.pipe_mode;
 	int clock_limit = dev_priv->max_dotclk_freq;
 
+	drm_mode_copy(pipe_mode, &pipe_config->hw.adjusted_mode);
+	intel_mode_from_crtc_timings(pipe_mode, pipe_mode);
+
 	if (INTEL_GEN(dev_priv) < 4) {
 		clock_limit = dev_priv->max_cdclk_freq * 9 / 10;
 
@@ -8199,16 +8204,16 @@ static int intel_crtc_compute_config(struct intel_crtc *crtc,
 		 * is > 90% of the (display) core speed.
 		 */
 		if (intel_crtc_supports_double_wide(crtc) &&
-		    adjusted_mode->crtc_clock > clock_limit) {
+		    pipe_mode->crtc_clock > clock_limit) {
 			clock_limit = dev_priv->max_dotclk_freq;
 			pipe_config->double_wide = true;
 		}
 	}
 
-	if (adjusted_mode->crtc_clock > clock_limit) {
+	if (pipe_mode->crtc_clock > clock_limit) {
 		drm_dbg_kms(&dev_priv->drm,
 			    "requested pixel clock (%d kHz) too high (max: %d kHz, double wide: %s)\n",
-			    adjusted_mode->crtc_clock, clock_limit,
+			    pipe_mode->crtc_clock, clock_limit,
 			    yesno(pipe_config->double_wide));
 		return -EINVAL;
 	}
@@ -8251,7 +8256,7 @@ static int intel_crtc_compute_config(struct intel_crtc *crtc,
 	 * WaPruneModeWithIncorrectHsyncOffset:ctg,elk,ilk,snb,ivb,vlv,hsw.
 	 */
 	if ((INTEL_GEN(dev_priv) > 4 || IS_G4X(dev_priv)) &&
-		adjusted_mode->crtc_hsync_start == adjusted_mode->crtc_hdisplay)
+	    pipe_mode->crtc_hsync_start == pipe_mode->crtc_hdisplay)
 		return -EINVAL;
 
 	intel_crtc_compute_pixel_rate(pipe_config);
@@ -12783,30 +12788,30 @@ static bool c8_planes_changed(const struct intel_crtc_state *new_crtc_state)
 
 static u16 hsw_linetime_wm(const struct intel_crtc_state *crtc_state)
 {
-	const struct drm_display_mode *adjusted_mode =
-		&crtc_state->hw.adjusted_mode;
+	const struct drm_display_mode *pipe_mode =
+		&crtc_state->hw.pipe_mode;
 	int linetime_wm;
 
 	if (!crtc_state->hw.enable)
 		return 0;
 
-	linetime_wm = DIV_ROUND_CLOSEST(adjusted_mode->crtc_htotal * 1000 * 8,
-					adjusted_mode->crtc_clock);
+	linetime_wm = DIV_ROUND_CLOSEST(pipe_mode->crtc_htotal * 1000 * 8,
+					pipe_mode->crtc_clock);
 
 	return min(linetime_wm, 0x1ff);
 }
 
 static u16 hsw_ips_linetime_wm(const struct intel_crtc_state *crtc_state,
 			       const struct intel_cdclk_state *cdclk_state)
 {
-	const struct drm_display_mode *adjusted_mode =
-		&crtc_state->hw.adjusted_mode;
+	const struct drm_display_mode *pipe_mode =
+		&crtc_state->hw.pipe_mode;
 	int linetime_wm;
 
 	if (!crtc_state->hw.enable)
 		return 0;
 
-	linetime_wm = DIV_ROUND_CLOSEST(adjusted_mode->crtc_htotal * 1000 * 8,
+	linetime_wm = DIV_ROUND_CLOSEST(pipe_mode->crtc_htotal * 1000 * 8,
 					cdclk_state->logical.cdclk);
 
 	return min(linetime_wm, 0x1ff);
@@ -12816,14 +12821,14 @@ static u16 skl_linetime_wm(const struct intel_crtc_state *crtc_state)
 {
 	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
 	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
-	const struct drm_display_mode *adjusted_mode =
-		&crtc_state->hw.adjusted_mode;
+	const struct drm_display_mode *pipe_mode =
+		&crtc_state->hw.pipe_mode;
 	int linetime_wm;
 
 	if (!crtc_state->hw.enable)
 		return 0;
 
-	linetime_wm = DIV_ROUND_UP(adjusted_mode->crtc_htotal * 1000 * 8,
+	linetime_wm = DIV_ROUND_UP(pipe_mode->crtc_htotal * 1000 * 8,
 				   crtc_state->pixel_rate);
 
 	/* Display WA #1135: BXT:ALL GLK:ALL */
@@ -13279,6 +13284,9 @@ static void intel_dump_pipe_config(const struct intel_crtc_state *pipe_config,
 	drm_dbg_kms(&dev_priv->drm, "adjusted mode:\n");
 	drm_mode_debug_printmodeline(&pipe_config->hw.adjusted_mode);
 	intel_dump_crtc_timings(dev_priv, &pipe_config->hw.adjusted_mode);
+	drm_dbg_kms(&dev_priv->drm, "pipe mode:\n");
+	drm_mode_debug_printmodeline(&pipe_config->hw.pipe_mode);
+	intel_dump_crtc_timings(dev_priv, &pipe_config->hw.pipe_mode);
 	drm_dbg_kms(&dev_priv->drm,
 		    "port clock: %d, pipe src size: %dx%d, pixel rate %d\n",
 		    pipe_config->port_clock,
@@ -14027,6 +14035,20 @@ intel_pipe_config_compare(const struct intel_crtc_state *current_config,
 
 	PIPE_CONF_CHECK_X(output_types);
 
+	PIPE_CONF_CHECK_I(hw.pipe_mode.crtc_hdisplay);
+	PIPE_CONF_CHECK_I(hw.pipe_mode.crtc_htotal);
+	PIPE_CONF_CHECK_I(hw.pipe_mode.crtc_hblank_start);
+	PIPE_CONF_CHECK_I(hw.pipe_mode.crtc_hblank_end);
+	PIPE_CONF_CHECK_I(hw.pipe_mode.crtc_hsync_start);
+	PIPE_CONF_CHECK_I(hw.pipe_mode.crtc_hsync_end);
+
+	PIPE_CONF_CHECK_I(hw.pipe_mode.crtc_vdisplay);
+	PIPE_CONF_CHECK_I(hw.pipe_mode.crtc_vtotal);
+	PIPE_CONF_CHECK_I(hw.pipe_mode.crtc_vblank_start);
+	PIPE_CONF_CHECK_I(hw.pipe_mode.crtc_vblank_end);
+	PIPE_CONF_CHECK_I(hw.pipe_mode.crtc_vsync_start);
+	PIPE_CONF_CHECK_I(hw.pipe_mode.crtc_vsync_end);
+
 	PIPE_CONF_CHECK_I(hw.adjusted_mode.crtc_hdisplay);
 	PIPE_CONF_CHECK_I(hw.adjusted_mode.crtc_htotal);
 	PIPE_CONF_CHECK_I(hw.adjusted_mode.crtc_hblank_start);
@@ -14153,6 +14175,7 @@ intel_pipe_config_compare(const struct intel_crtc_state *current_config,
 	if (IS_G4X(dev_priv) || INTEL_GEN(dev_priv) >= 5)
 		PIPE_CONF_CHECK_I(pipe_bpp);
 
+	PIPE_CONF_CHECK_CLOCK_FUZZY(hw.pipe_mode.crtc_clock);
 	PIPE_CONF_CHECK_CLOCK_FUZZY(hw.adjusted_mode.crtc_clock);
 	PIPE_CONF_CHECK_CLOCK_FUZZY(port_clock);
 

drivers/gpu/drm/i915/display/intel_display_types.h

@@ -817,15 +817,22 @@ struct intel_crtc_state {
 	 * The following members are used to verify the hardware state:
 	 * - enable
 	 * - active
-	 * - mode / adjusted_mode
+	 * - mode / pipe_mode / adjusted_mode
 	 * - color property blobs.
 	 *
 	 * During initial hw readout, they need to be copied to uapi.
+	 *
+	 * Bigjoiner will allow a transcoder mode that spans 2 pipes;
+	 * Use the pipe_mode for calculations like watermarks, pipe
+	 * scaler, and bandwidth.
+	 *
+	 * Use adjusted_mode for things that need to know the full
+	 * mode on the transcoder, which spans all pipes.
 	 */
 	struct {
 		bool active, enable;
 		struct drm_property_blob *degamma_lut, *gamma_lut, *ctm;
-		struct drm_display_mode mode, adjusted_mode;
+		struct drm_display_mode mode, pipe_mode, adjusted_mode;
 		enum drm_scaling_filter scaling_filter;
 	} hw;