disp: msm: dp: add ability to select pattern for tpg

Currently the tpg_ctrl node takes a boolean flag to enable or disable
test pattern output on DP controller. It always sets the pattern type
to a default pattern. This change updates this interface to accept an
integer value so the user can select different patterns supported by
the controller.

Change-Id: I399091a57f353b2fb8d29a48a8390898ca9afb55
Signed-off-by: Rajkumar Subbiah <quic_rsubbia@quicinc.com>

msm/dp/dp_catalog.c

@@ -44,6 +44,8 @@
 	(DP_INTR_MST_DP0_VCPF_SENT | DP_INTR_MST_DP1_VCPF_SENT)
 
 #define DP_INTR_MASK5		(DP_INTERRUPT_STATUS5 << 2)
+#define DP_TPG_PATTERN_MAX	9
+#define DP_TPG_PATTERN_DEFAULT	8
 
 #define dp_catalog_fill_io(x) { \
 	catalog->io.x = parser->get_io(parser, #x); \
@@ -1417,8 +1419,7 @@ static void dp_catalog_ctrl_usb_reset(struct dp_catalog_ctrl *ctrl, bool flip)
 	wmb();
 }
 
-static void dp_catalog_panel_tpg_cfg(struct dp_catalog_panel *panel,
-	bool enable)
+static void dp_catalog_panel_tpg_cfg(struct dp_catalog_panel *panel, u32 pattern)
 {
 	struct dp_catalog_private *catalog;
 	struct dp_io_data *io_data;
@@ -1441,7 +1442,7 @@ static void dp_catalog_panel_tpg_cfg(struct dp_catalog_panel *panel,
 	else if (panel->stream_id == DP_STREAM_1)
 		io_data = catalog->io.dp_p1;
 
-	if (!enable) {
+	if (!pattern) {
 		dp_write(MMSS_DP_TPG_MAIN_CONTROL, 0x0);
 		dp_write(MMSS_DP_BIST_ENABLE, 0x0);
 		reg = dp_read(MMSS_DP_TIMING_ENGINE_EN);
@@ -1451,6 +1452,9 @@ static void dp_catalog_panel_tpg_cfg(struct dp_catalog_panel *panel,
 		return;
 	}
 
+	if (pattern > DP_TPG_PATTERN_MAX)
+		pattern = DP_TPG_PATTERN_DEFAULT;
+
 	dp_write(MMSS_DP_INTF_HSYNC_CTL,
 			panel->hsync_ctl);
 	dp_write(MMSS_DP_INTF_VSYNC_PERIOD_F0,
@@ -1472,7 +1476,7 @@ static void dp_catalog_panel_tpg_cfg(struct dp_catalog_panel *panel,
 	dp_write(MMSS_DP_INTF_POLARITY_CTL, 0);
 	wmb(); /* ensure TPG registers are programmed */
 
-	dp_write(MMSS_DP_TPG_MAIN_CONTROL, 0x100);
+	dp_write(MMSS_DP_TPG_MAIN_CONTROL, (1 << pattern));
 	dp_write(MMSS_DP_TPG_VIDEO_CONFIG, 0x5);
 	wmb(); /* ensure TPG config is programmed */
 	dp_write(MMSS_DP_BIST_ENABLE, 0x1);

msm/dp/dp_catalog.h

@@ -1,5 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 /*
+ * Copyright (c) 2022, Qualcomm Innovation Center, Inc. All rights reserved.
  * Copyright (c) 2017-2021, The Linux Foundation. All rights reserved.
  */
 
@@ -208,7 +209,7 @@ struct dp_catalog_panel {
 	void (*config_sdp)(struct dp_catalog_panel *panel, bool en);
 	int (*set_colorspace)(struct dp_catalog_panel *panel,
 		 bool vsc_supported);
-	void (*tpg_config)(struct dp_catalog_panel *panel, bool enable);
+	void (*tpg_config)(struct dp_catalog_panel *panel, u32  pattern);
 	void (*config_spd)(struct dp_catalog_panel *panel);
 	void (*config_misc)(struct dp_catalog_panel *panel);
 	void (*config_msa)(struct dp_catalog_panel *panel,

msm/dp/dp_debug.c

@@ -893,7 +893,7 @@ static ssize_t dp_debug_tpg_write(struct file *file,
 	struct dp_debug_private *debug = file->private_data;
 	char buf[SZ_8];
 	size_t len = 0;
-	u32 tpg_state = 0;
+	u32 tpg_pattern = 0;
 
 	if (!debug)
 		return -ENODEV;
@@ -908,19 +908,18 @@ static ssize_t dp_debug_tpg_write(struct file *file,
 
 	buf[len] = '\0';
 
-	if (kstrtoint(buf, 10, &tpg_state) != 0)
+	if (kstrtoint(buf, 10, &tpg_pattern) != 0)
 		goto bail;
 
-	tpg_state &= 0x1;
-	DP_DEBUG("tpg_state: %d\n", tpg_state);
+	DP_DEBUG("tpg_pattern: %d\n", tpg_pattern);
 
-	if (tpg_state == debug->dp_debug.tpg_state)
+	if (tpg_pattern == debug->dp_debug.tpg_pattern)
 		goto bail;
 
 	if (debug->panel)
-		debug->panel->tpg_config(debug->panel, tpg_state);
+		debug->panel->tpg_config(debug->panel, tpg_pattern);
 
-	debug->dp_debug.tpg_state = tpg_state;
+	debug->dp_debug.tpg_pattern = tpg_pattern;
 bail:
 	return len;
 }
@@ -1386,7 +1385,7 @@ static ssize_t dp_debug_tpg_read(struct file *file,
 	if (*ppos)
 		return 0;
 
-	len += snprintf(buf, SZ_8, "%d\n", debug->dp_debug.tpg_state);
+	len += scnprintf(buf, SZ_8, "%d\n", debug->dp_debug.tpg_pattern);
 
 	len = min_t(size_t, count, len);
 	if (copy_to_user(user_buff, buf, len))

msm/dp/dp_debug.h

@@ -1,5 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 /*
+ * Copyright (c) 2022, Qualcomm Innovation Center, Inc. All rights reserved.
  * Copyright (c) 2017-2021, The Linux Foundation. All rights reserved.
  */
 
@@ -52,7 +53,7 @@
  * @psm_enabled: specifies whether psm enabled
  * @hdcp_disabled: specifies if hdcp is disabled
  * @hdcp_wait_sink_sync: used to wait for sink synchronization before HDCP auth
- * @tpg_state: specifies whether tpg feature is enabled
+ * @tpg_pattern: selects tpg pattern on the controller
  * @max_pclk_khz: max pclk supported
  * @force_encryption: enable/disable forced encryption for HDCP 2.2
  * @skip_uevent: skip hotplug uevent to the user space
@@ -70,7 +71,7 @@ struct dp_debug {
 	bool psm_enabled;
 	bool hdcp_disabled;
 	bool hdcp_wait_sink_sync;
-	bool tpg_state;
+	u32 tpg_pattern;
 	u32 max_pclk_khz;
 	bool force_encryption;
 	bool skip_uevent;

msm/dp/dp_display.c

@@ -1695,8 +1695,8 @@ static int dp_display_stream_enable(struct dp_display_private *dp,
 
 	rc = dp->ctrl->stream_on(dp->ctrl, dp_panel);
 
-	if (dp->debug->tpg_state)
-		dp_panel->tpg_config(dp_panel, true);
+	if (dp->debug->tpg_pattern)
+		dp_panel->tpg_config(dp_panel, dp->debug->tpg_pattern);
 
 	if (!rc) {
 		dp->active_panels[dp_panel->stream_id] = dp_panel;

msm/dp/dp_panel.c

@@ -1,5 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
+ * Copyright (c) 2022, Qualcomm Innovation Center, Inc. All rights reserved.
  * Copyright (c) 2012-2021, The Linux Foundation. All rights reserved.
  */
 
@@ -2074,7 +2075,7 @@ static void dp_panel_handle_sink_request(struct dp_panel *dp_panel)
 	}
 }
 
-static void dp_panel_tpg_config(struct dp_panel *dp_panel, bool enable)
+static void dp_panel_tpg_config(struct dp_panel *dp_panel, u32 pattern)
 {
 	u32 hsync_start_x, hsync_end_x, hactive;
 	struct dp_catalog_panel *catalog;
@@ -2100,8 +2101,8 @@ static void dp_panel_tpg_config(struct dp_panel *dp_panel, bool enable)
 		return;
 	}
 
-	if (!enable) {
-		panel->catalog->tpg_config(catalog, false);
+	if (!pattern) {
+		panel->catalog->tpg_config(catalog, pattern);
 		return;
 	}
 
@@ -2132,7 +2133,7 @@ static void dp_panel_tpg_config(struct dp_panel *dp_panel, bool enable)
 			pinfo->h_sync_width;
 	catalog->display_hctl = (hsync_end_x << 16) | hsync_start_x;
 
-	panel->catalog->tpg_config(catalog, true);
+	panel->catalog->tpg_config(catalog, pattern);
 }
 
 static int dp_panel_config_timing(struct dp_panel *dp_panel)

msm/dp/dp_panel.h

@@ -1,5 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 /*
+ * Copyright (c) 2022, Qualcomm Innovation Center, Inc. All rights reserved.
  * Copyright (c) 2012-2021, The Linux Foundation. All rights reserved.
  */
 
@@ -176,7 +177,7 @@ struct dp_panel {
 			bool dhdr_update, u64 core_clk_rate, bool flush);
 	int (*set_colorspace)(struct dp_panel *dp_panel,
 		u32 colorspace);
-	void (*tpg_config)(struct dp_panel *dp_panel, bool enable);
+	void (*tpg_config)(struct dp_panel *dp_panel, u32 pattern);
 	int (*spd_config)(struct dp_panel *dp_panel);
 	bool (*hdr_supported)(struct dp_panel *dp_panel);