[Intel-gfx] [PATCH 2/5] drm/i915: Parsing the PWM cntrl and CABC ON/OFF fields in VBT

[Jani Nikula]

From: Deepak M <m.deepak at intel.com>

For dual link panel scenarios there are new fields added in the
VBT which indicate on which port the PWM cntrl and CABC ON/OFF
commands needs to be sent.

v2: Moving the comment to intel_dsi.h(Jani)

v3: Renaming the field names (Jani)

v4 by Jani: make this patch only about VBT

Cc: Jani Nikula <jani.nikula at intel.com>
Cc: Daniel Vetter <daniel.vetter at intel.com>
Cc: Yetunde Adebisi <yetundex.adebisi at intel.com>
Signed-off-by: Deepak M <m.deepak at intel.com>
Signed-off-by: Jani Nikula <jani.nikula at intel.com>
---
 drivers/gpu/drm/i915/intel_bios.c | 10 ++++++++++
 drivers/gpu/drm/i915/intel_bios.h |  8 +++++++-
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios.c
index 9c406b0f4173..6985519921b4 100644
--- a/drivers/gpu/drm/i915/intel_bios.c
+++ b/drivers/gpu/drm/i915/intel_bios.c
@@ -746,6 +746,16 @@ parse_mipi_config(struct drm_i915_private *dev_priv,
 		return;
 	}
 
+	/*
+	 * These fields are introduced from the VBT version 197 onwards,
+	 * so making sure that these bits are set zero in the previous
+	 * versions.
+	 */
+	if (dev_priv->vbt.dsi.config->dual_link && bdb->version < 197) {
+		dev_priv->vbt.dsi.config->dl_dcs_cabc_ports = 0;
+		dev_priv->vbt.dsi.config->dl_dcs_backlight_ports = 0;
+	}
+
 	/* We have mandatory mipi config blocks. Initialize as generic panel */
 	dev_priv->vbt.dsi.panel_id = MIPI_DSI_GENERIC_PANEL_ID;
 }
diff --git a/drivers/gpu/drm/i915/intel_bios.h b/drivers/gpu/drm/i915/intel_bios.h
index ab0ea315eddb..149c3226e895 100644
--- a/drivers/gpu/drm/i915/intel_bios.h
+++ b/drivers/gpu/drm/i915/intel_bios.h
@@ -113,7 +113,13 @@ struct mipi_config {
 	u16 dual_link:2;
 	u16 lane_cnt:2;
 	u16 pixel_overlap:3;
-	u16 rsvd3:9;
+	u16 rgb_flip:1;
+#define DL_DCS_PORT_A			0x00
+#define DL_DCS_PORT_C			0x01
+#define DL_DCS_PORT_A_AND_C		0x02
+	u16 dl_dcs_cabc_ports:2;
+	u16 dl_dcs_backlight_ports:2;
+	u16 rsvd3:4;
 
 	u16 rsvd4;
 
-- 
2.1.4