drm/i915/bios: Use the cached BDB version

We have the BDB version cached, use it. We're going to have to
start doing some of the BDB block parsing later, at which point
we may no longer have the VBT around anymore (we free it at the
end of intel_bios_init() when it didn't come via OpRegion).
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220405173410.11436-2-ville.syrjala@linux.intel.comReviewed-by: Jani Nikula <jani.nikula@intel.com>

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

@@ -415,7 +415,7 @@ parse_panel_dtd(struct drm_i915_private *i915,
 	 * try the new generic DTD block first on VBT >= 229, but still fall
 	 * back to trying the old LFP block if that fails.
 	 */
-	if (bdb->version >= 229)
+	if (i915->vbt.version >= 229)
 		parse_generic_dtd(i915, bdb);
 	if (!i915->vbt.lfp_lvds_vbt_mode)
 		parse_lfp_panel_dtd(i915, bdb);
@@ -452,12 +452,12 @@ parse_lfp_backlight(struct drm_i915_private *i915,
 	}
 
 	i915->vbt.backlight.type = INTEL_BACKLIGHT_DISPLAY_DDI;
-	if (bdb->version >= 191) {
+	if (i915->vbt.version >= 191) {
 		size_t exp_size;
 
-		if (bdb->version >= 236)
+		if (i915->vbt.version >= 236)
 			exp_size = sizeof(struct bdb_lfp_backlight_data);
-		else if (bdb->version >= 234)
+		else if (i915->vbt.version >= 234)
 			exp_size = EXP_BDB_LFP_BL_DATA_SIZE_REV_234;
 		else
 			exp_size = EXP_BDB_LFP_BL_DATA_SIZE_REV_191;
@@ -474,14 +474,14 @@ parse_lfp_backlight(struct drm_i915_private *i915,
 	i915->vbt.backlight.pwm_freq_hz = entry->pwm_freq_hz;
 	i915->vbt.backlight.active_low_pwm = entry->active_low_pwm;
 
-	if (bdb->version >= 234) {
+	if (i915->vbt.version >= 234) {
 		u16 min_level;
 		bool scale;
 
 		level = backlight_data->brightness_level[panel_type].level;
 		min_level = backlight_data->brightness_min_level[panel_type].level;
 
-		if (bdb->version >= 236)
+		if (i915->vbt.version >= 236)
 			scale = backlight_data->brightness_precision_bits[panel_type] == 16;
 		else
 			scale = level > 255;
@@ -581,7 +581,7 @@ parse_general_features(struct drm_i915_private *i915,
 
 	i915->vbt.int_tv_support = general->int_tv_support;
 	/* int_crt_support can't be trusted on earlier platforms */
-	if (bdb->version >= 155 &&
+	if (i915->vbt.version >= 155 &&
 	    (HAS_DDI(i915) || IS_VALLEYVIEW(i915)))
 		i915->vbt.int_crt_support = general->int_crt_support;
 	i915->vbt.lvds_use_ssc = general->enable_ssc;
@@ -589,7 +589,7 @@ parse_general_features(struct drm_i915_private *i915,
 		intel_bios_ssc_frequency(i915, general->ssc_freq);
 	i915->vbt.display_clock_mode = general->display_clock_mode;
 	i915->vbt.fdi_rx_polarity_inverted = general->fdi_rx_polarity_inverted;
-	if (bdb->version >= 181) {
+	if (i915->vbt.version >= 181) {
 		i915->vbt.orientation = general->rotate_180 ?
 			DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP :
 			DRM_MODE_PANEL_ORIENTATION_NORMAL;
@@ -597,7 +597,7 @@ parse_general_features(struct drm_i915_private *i915,
 		i915->vbt.orientation = DRM_MODE_PANEL_ORIENTATION_UNKNOWN;
 	}
 
-	if (bdb->version >= 249 && general->afc_startup_config) {
+	if (i915->vbt.version >= 249 && general->afc_startup_config) {
 		i915->vbt.override_afc_startup = true;
 		i915->vbt.override_afc_startup_val = general->afc_startup_config == 0x1 ? 0x0 : 0x7;
 	}
@@ -724,13 +724,13 @@ parse_driver_features(struct drm_i915_private *i915,
 		 * in the wild with the bits correctly populated. Version
 		 * 108 (on i85x) does not have the bits correctly populated.
 		 */
-		if (bdb->version >= 134 &&
+		if (i915->vbt.version >= 134 &&
 		    driver->lvds_config != BDB_DRIVER_FEATURE_INT_LVDS &&
 		    driver->lvds_config != BDB_DRIVER_FEATURE_INT_SDVO_LVDS)
 			i915->vbt.int_lvds_support = 0;
 	}
 
-	if (bdb->version < 228) {
+	if (i915->vbt.version < 228) {
 		drm_dbg_kms(&i915->drm, "DRRS State Enabled:%d\n",
 			    driver->drrs_enabled);
 		/*
@@ -753,7 +753,7 @@ parse_power_conservation_features(struct drm_i915_private *i915,
 	const struct bdb_lfp_power *power;
 	u8 panel_type = i915->vbt.panel_type;
 
-	if (bdb->version < 228)
+	if (i915->vbt.version < 228)
 		return;
 
 	power = find_section(bdb, BDB_LFP_POWER);
@@ -771,7 +771,7 @@ parse_power_conservation_features(struct drm_i915_private *i915,
 	if (!(power->drrs & BIT(panel_type)))
 		i915->vbt.drrs_type = DRRS_TYPE_NONE;
 
-	if (bdb->version >= 232)
+	if (i915->vbt.version >= 232)
 		i915->vbt.edp.hobl = power->hobl & BIT(panel_type);
 }
 
@@ -876,7 +876,7 @@ parse_edp(struct drm_i915_private *i915, const struct bdb_header *bdb)
 		break;
 	}
 
-	if (bdb->version >= 173) {
+	if (i915->vbt.version >= 173) {
 		u8 vswing;
 
 		/* Don't read from VBT if module parameter has valid value*/
@@ -919,7 +919,7 @@ parse_psr(struct drm_i915_private *i915, const struct bdb_header *bdb)
 	 * New psr options 0=500us, 1=100us, 2=2500us, 3=0us
 	 * Old decimal value is wake up time in multiples of 100 us.
 	 */
-	if (bdb->version >= 205 &&
+	if (i915->vbt.version >= 205 &&
 	    (DISPLAY_VER(i915) >= 9 && !IS_BROXTON(i915))) {
 		switch (psr_table->tp1_wakeup_time) {
 		case 0:
@@ -965,7 +965,7 @@ parse_psr(struct drm_i915_private *i915, const struct bdb_header *bdb)
 		i915->vbt.psr.tp2_tp3_wakeup_time_us = psr_table->tp2_tp3_wakeup_time * 100;
 	}
 
-	if (bdb->version >= 226) {
+	if (i915->vbt.version >= 226) {
 		u32 wakeup_time = psr->psr2_tp2_tp3_wakeup_time;
 
 		wakeup_time = (wakeup_time >> (2 * panel_type)) & 0x3;
@@ -1085,7 +1085,7 @@ parse_mipi_config(struct drm_i915_private *i915,
 		return;
 	}
 
-	parse_dsi_backlight_ports(i915, bdb->version, port);
+	parse_dsi_backlight_ports(i915, i915->vbt.version, port);
 
 	/* FIXME is the 90 vs. 270 correct? */
 	switch (config->rotation) {
@@ -1448,7 +1448,7 @@ parse_compression_parameters(struct drm_i915_private *i915,
 	u16 block_size;
 	int index;
 
-	if (bdb->version < 198)
+	if (i915->vbt.version < 198)
 		return;
 
 	params = find_section(bdb, BDB_COMPRESSION_PARAMETERS);
@@ -2117,31 +2117,31 @@ parse_general_definitions(struct drm_i915_private *i915,
 	if (intel_gmbus_is_valid_pin(i915, bus_pin))
 		i915->vbt.crt_ddc_pin = bus_pin;
 
-	if (bdb->version < 106) {
+	if (i915->vbt.version < 106) {
 		expected_size = 22;
-	} else if (bdb->version < 111) {
+	} else if (i915->vbt.version < 111) {
 		expected_size = 27;
-	} else if (bdb->version < 195) {
+	} else if (i915->vbt.version < 195) {
 		expected_size = LEGACY_CHILD_DEVICE_CONFIG_SIZE;
-	} else if (bdb->version == 195) {
+	} else if (i915->vbt.version == 195) {
 		expected_size = 37;
-	} else if (bdb->version <= 215) {
+	} else if (i915->vbt.version <= 215) {
 		expected_size = 38;
-	} else if (bdb->version <= 237) {
+	} else if (i915->vbt.version <= 237) {
 		expected_size = 39;
 	} else {
 		expected_size = sizeof(*child);
 		BUILD_BUG_ON(sizeof(*child) < 39);
 		drm_dbg(&i915->drm,
 			"Expected child device config size for VBT version %u not known; assuming %u\n",
-			bdb->version, expected_size);
+			i915->vbt.version, expected_size);
 	}
 
 	/* Flag an error for unexpected size, but continue anyway. */
 	if (defs->child_dev_size != expected_size)
 		drm_err(&i915->drm,
 			"Unexpected child device config size %u (expected %u for VBT version %u)\n",
-			defs->child_dev_size, expected_size, bdb->version);
+			defs->child_dev_size, expected_size, i915->vbt.version);
 
 	/* The legacy sized child device config is the minimum we need. */
 	if (defs->child_dev_size < LEGACY_CHILD_DEVICE_CONFIG_SIZE) {
@@ -2497,7 +2497,7 @@ void intel_bios_init(struct drm_i915_private *i915)
 
 	drm_dbg_kms(&i915->drm,
 		    "VBT signature \"%.*s\", BDB version %d\n",
-		    (int)sizeof(vbt->signature), vbt->signature, bdb->version);
+		    (int)sizeof(vbt->signature), vbt->signature, i915->vbt.version);
 
 	/* Grab useful general definitions */
 	parse_general_features(i915, bdb);