[PATCH v10 2/8] drm/i915/bios: store VBT #57's metadata in intel_vbt_data

["Michał Grzelak" <michal.grzelak@intel.com>]

Store tables, number of tables, number of rows and number of columns in
intel_vbt_data when search for the VBT #57 has succeeded. Structurize
all VS/PE-O relevant metadata inside anonymous struct named as vspeo.

Presence of C20 or newer PHY causes each table to contain 16 rows. Each
table contains 10 rows in case C20 PHY is absent. Use display version to
determine number of rows since there is no helper in intel_bios.c to
check presence of any C20+ PHY. pre-MTL platforms should have 10 rows
while MTL+ should have 16 rows.

v5->v6
- add Bspec (Suraj)

v3->v4
- remove unnecessary init of VS/PE-O metadata (Suraj)
- add helper for computing number of rows (Suraj)
- fix num_rows's type (Jani, Suraj)
- declare num_rows (Suraj)

Bspec: 68963
Signed-off-by: Michał Grzelak <michal.grzelak@intel.com>
Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com>
---
 drivers/gpu/drm/i915/display/intel_bios.c         | 10 ++++++++++
 drivers/gpu/drm/i915/display/intel_display_core.h |  7 +++++++
 2 files changed, 17 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_bios.c b/drivers/gpu/drm/i915/display/intel_bios.c
index ece4df4a9d62..06a8dd7581bb 100644
--- a/drivers/gpu/drm/i915/display/intel_bios.c
+++ b/drivers/gpu/drm/i915/display/intel_bios.c
@@ -2205,6 +2205,11 @@ parse_compression_parameters(struct intel_display *display)
 	}
 }
 
+static int vswing_preemph_num_rows(struct intel_display *display)
+{
+	return DISPLAY_VER(display) >= 14 ? 16 : 10;
+}
+
 static void
 parse_vswing_preemph_override(struct intel_display *display)
 {
@@ -2218,6 +2223,11 @@ parse_vswing_preemph_override(struct intel_display *display)
 	/* pre-ICL GOPs don't have VBT #57 */
 	if (!block)
 		return;
+
+	display->vbt.vspeo.tables = block->tables;
+	display->vbt.vspeo.num_tables = block->num_tables;
+	display->vbt.vspeo.num_columns = block->num_columns;
+	display->vbt.vspeo.num_rows = vswing_preemph_num_rows(display);
 }
 
 static u8 translate_iboost(struct intel_display *display, u8 val)
diff --git a/drivers/gpu/drm/i915/display/intel_display_core.h b/drivers/gpu/drm/i915/display/intel_display_core.h
index 17f7d3abdb9c..82754dceb3b8 100644
--- a/drivers/gpu/drm/i915/display/intel_display_core.h
+++ b/drivers/gpu/drm/i915/display/intel_display_core.h
@@ -242,6 +242,13 @@ struct intel_vbt_data {
 	struct list_head display_devices;
 	struct list_head bdb_blocks;
 
+	struct {
+		const u32 *tables;
+		int num_tables;
+		int num_columns;
+		int num_rows;
+	} vspeo;
+
 	struct sdvo_device_mapping {
 		u8 initialized;
 		u8 dvo_port;
-- 
2.45.2