[PATCH 36/59] drm/kmb: Enable MIPI TX HS Test Pattern Generation

[Anitha Chrisanthus <anitha.chrisanthus@intel.com>]

From: Edmund Dea <edmund.j.dea@intel.com>

Added test pattern generator function. Enable this at compile time to
test if mipi is working. mipi->hdmi section

Signed-off-by: Edmund Dea <edmund.j.dea@intel.com>
Reviewed-by: Bob Paauwe <bob.j.paauwe@intel.com>
---
 drivers/gpu/drm/kmb/kmb_dsi.c  | 31 +++++++++++++++++++++++++++++++
 drivers/gpu/drm/kmb/kmb_dsi.h  |  7 +++++++
 drivers/gpu/drm/kmb/kmb_regs.h | 11 +++++++++++
 3 files changed, 49 insertions(+)

diff --git a/drivers/gpu/drm/kmb/kmb_dsi.c b/drivers/gpu/drm/kmb/kmb_dsi.c
index 8ab4de7..47ec2ab 100644
--- a/drivers/gpu/drm/kmb/kmb_dsi.c
+++ b/drivers/gpu/drm/kmb/kmb_dsi.c
@@ -764,6 +764,32 @@ static void mipi_tx_ctrl_cfg(struct kmb_drm_private *dev_p, u8 fg_id,
 	kmb_write_mipi(dev_p, MIPI_TXm_HS_CTRL(ctrl_no), ctrl);
 }
 
+#ifdef MIPI_TX_TEST_PATTERN_GENERATION
+static void mipi_tx_hs_tp_gen(struct kmb_drm_private *dev_p, int vc,
+		int tp_sel, u32 stripe_width, u32 color0, u32 color1)
+{
+	u32 ctrl_no = MIPI_CTRL6;
+
+	/* Select test pattern mode on the virtual channel */
+	kmb_write_mipi(dev_p, MIPI_TXm_HS_TEST_PAT_CTRL(ctrl_no),
+			TP_SEL_VCm(vc, tp_sel));
+
+	if (tp_sel == MIPI_TX_HS_TP_V_STRIPES ||
+			tp_sel == MIPI_TX_HS_TP_H_STRIPES) {
+		kmb_write_mipi(dev_p, MIPI_TXm_HS_TEST_PAT_CTRL(ctrl_no),
+				TP_STRIPE_WIDTH(stripe_width));
+	}
+
+	/* Configure test pattern colors */
+	kmb_write_mipi(dev_p, MIPI_TX_HS_TEST_PAT_COLOR0, color0);
+	kmb_write_mipi(dev_p, MIPI_TX_HS_TEST_PAT_COLOR1, color1);
+
+	/* Enable test pattern generation on the virtual channel */
+	kmb_write_mipi(dev_p, MIPI_TXm_HS_TEST_PAT_CTRL(ctrl_no),
+			TP_EN_VCm(vc));
+}
+#endif
+
 static u32 mipi_tx_init_cntrl(struct kmb_drm_private *dev_p,
 		struct mipi_ctrl_cfg *ctrl_cfg)
 {
@@ -827,6 +853,11 @@ static u32 mipi_tx_init_cntrl(struct kmb_drm_private *dev_p,
 	/*Multi-Channel FIFO Configuration*/
 	mipi_tx_multichannel_fifo_cfg(dev_p, ctrl_cfg->active_lanes, frame_id);
 
+#ifdef MIPI_TX_TEST_PATTERN_GENERATION
+	mipi_tx_hs_tp_gen(dev_p, 0, MIPI_TX_HS_TP_WHOLE_FRAME_COLOR0, 0,
+			0xffffffff, 0);
+#endif
+
 	/*Frame Generator Enable */
 	mipi_tx_ctrl_cfg(dev_p, frame_id, ctrl_cfg);
 	return ret;
diff --git a/drivers/gpu/drm/kmb/kmb_dsi.h b/drivers/gpu/drm/kmb/kmb_dsi.h
index e85625b..ef526b4 100644
--- a/drivers/gpu/drm/kmb/kmb_dsi.h
+++ b/drivers/gpu/drm/kmb/kmb_dsi.h
@@ -200,6 +200,13 @@ enum mipi_dsi_data_type {
 	DSI_LP_DT_RESERVED_3F = 0x3f
 };
 
+enum mipi_tx_hs_tp_sel {
+	MIPI_TX_HS_TP_WHOLE_FRAME_COLOR0 = 0,
+	MIPI_TX_HS_TP_WHOLE_FRAME_COLOR1,
+	MIPI_TX_HS_TP_V_STRIPES,
+	MIPI_TX_HS_TP_H_STRIPES,
+};
+
 enum dphy_mode {
 	MIPI_DPHY_SLAVE = 0,
 	MIPI_DPHY_MASTER
diff --git a/drivers/gpu/drm/kmb/kmb_regs.h b/drivers/gpu/drm/kmb/kmb_regs.h
index 20b331d..2377439 100644
--- a/drivers/gpu/drm/kmb/kmb_regs.h
+++ b/drivers/gpu/drm/kmb/kmb_regs.h
@@ -645,6 +645,17 @@
 			MIPI_TX_HS_IRQ_CLEAR \
 			+ HS_OFFSET(M), val)
 
+/* MIPI Test Pattern Generation */
+#define MIPI_TX_HS_TEST_PAT_CTRL			(0x230)
+#define   MIPI_TXm_HS_TEST_PAT_CTRL(M)			\
+				(MIPI_TX_HS_TEST_PAT_CTRL + HS_OFFSET(M))
+#define   TP_EN_VCm(M)					((M) * 0x04)
+#define   TP_SEL_VCm(M, N)				\
+				(N << (((M) * 0x04) + 1))
+#define   TP_STRIPE_WIDTH(M)				((M) << 16)
+#define MIPI_TX_HS_TEST_PAT_COLOR0			(0x234)
+#define MIPI_TX_HS_TEST_PAT_COLOR1			(0x238)
+
 /* D-PHY regs */
 #define DPHY_ENABLE				(0x100)
 #define DPHY_INIT_CTRL0				(0x104)
-- 
2.7.4

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