Date:   Tue, 22 Jan 2019 09:24:34 +0000
From:   "james qian wang (Arm Technology China)" <james.qian.wang@....com>
To:     Liviu Dudau <Liviu.Dudau@....com>,
        "airlied@...ux.ie" <airlied@...ux.ie>,
        Brian Starkey <Brian.Starkey@....com>
CC:     "Jonathan Chai (Arm Technology China)" <Jonathan.Chai@....com>,
        "Julien Yin (Arm Technology China)" <Julien.Yin@....com>,
        "thomas Sun (Arm Technology China)" <thomas.Sun@....com>,
        "Lowry Li (Arm Technology China)" <Lowry.Li@....com>,
        Ayan Halder <Ayan.Halder@....com>,
        "Tiannan Zhu (Arm Technology China)" <Tiannan.Zhu@....com>,
        "Jin Gao (Arm Technology China)" <Jin.Gao@....com>,
        "Yiqi Kang (Arm Technology China)" <Yiqi.Kang@....com>,
        nd <nd@....com>, "malidp@...s.arm.com" <malidp@...s.arm.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "james qian wang (Arm Technology China)" <james.qian.wang@....com>
Subject: [PATCH v2 7/7] drm/komeda: Add debugfs node "register" for register
 dump

From: "james qian wang (Arm Technology China)" <james.qian.wang@....com>

Add a debugfs node "register" and entry function dump_register to
dev/pipeline/component to register dump, then user can read
"/sys/kernel/debug/komeda/register" to get the register values via these
chip function.

Signed-off-by: James Qian Wang (Arm Technology China) <james.qian.wang@....com>
---
 .../arm/display/komeda/d71/d71_component.c    | 205 ++++++++++++++++++
 .../gpu/drm/arm/display/komeda/komeda_dev.c   |  52 +++++
 .../gpu/drm/arm/display/komeda/komeda_dev.h   |   5 +
 .../drm/arm/display/komeda/komeda_pipeline.c  |  20 ++
 .../drm/arm/display/komeda/komeda_pipeline.h  |   3 +
 5 files changed, 285 insertions(+)

diff --git a/drivers/gpu/drm/arm/display/komeda/d71/d71_component.c b/drivers/gpu/drm/arm/display/komeda/d71/d71_component.c
index 095779964518..eb8f16e089e7 100644
--- a/drivers/gpu/drm/arm/display/komeda/d71/d71_component.c
+++ b/drivers/gpu/drm/arm/display/komeda/d71/d71_component.c
@@ -69,6 +69,42 @@ static u32 get_valid_inputs(struct block_header *blk)
 	return valid_inputs;
 }
 
+static void get_values_from_reg(void __iomem *reg, u32 offset,
+				u32 count, u32 *val)
+{
+	u32 i, addr;
+
+	for (i = 0; i < count; i++) {
+		addr = offset + (i << 2);
+		/* 0xA4 is WO register */
+		if (addr != 0xA4)
+			val[i] = malidp_read32(reg, addr);
+		else
+			val[i] = 0xDEADDEAD;
+	}
+}
+
+static void dump_block_header(struct seq_file *sf, void __iomem *reg)
+{
+	struct block_header hdr;
+	u32 i, n_input, n_output;
+
+	d71_read_block_header(reg, &hdr);
+	seq_printf(sf, "BLOCK_INFO:\t\t0x%X\n", hdr.block_info);
+	seq_printf(sf, "PIPELINE_INFO:\t\t0x%X\n", hdr.pipeline_info);
+
+	n_output = PIPELINE_INFO_N_OUTPUTS(hdr.pipeline_info);
+	n_input  = PIPELINE_INFO_N_VALID_INPUTS(hdr.pipeline_info);
+
+	for (i = 0; i < n_input; i++)
+		seq_printf(sf, "VALID_INPUT_ID%u:\t0x%X\n",
+			   i, hdr.input_ids[i]);
+
+	for (i = 0; i < n_output; i++)
+		seq_printf(sf, "OUTPUT_ID%u:\t\t0x%X\n",
+			   i, hdr.output_ids[i]);
+}
+
 static u32 to_rot_ctrl(u32 rot)
 {
 	u32 lr_ctrl = 0;
@@ -141,9 +177,76 @@ static void d71_layer_update(struct komeda_component *c,
 	malidp_write32_mask(reg, BLK_CONTROL, ctrl_mask, ctrl);
 }
 
+static void d71_layer_dump(struct komeda_component *c, struct seq_file *sf)
+{
+	u32 v[15], i;
+	bool rich, rgb2rgb;
+	char *prefix;
+
+	get_values_from_reg(c->reg, LAYER_INFO, 1, &v[14]);
+	if (v[14] & 0x1) {
+		rich = true;
+		prefix = "LR_";
+	} else {
+		rich = false;
+		prefix = "LS_";
+	}
+
+	rgb2rgb = !!(v[14] & L_INFO_CM);
+
+	dump_block_header(sf, c->reg);
+
+	seq_printf(sf, "%sLAYER_INFO:\t\t0x%X\n", prefix, v[14]);
+
+	get_values_from_reg(c->reg, 0xD0, 1, v);
+	seq_printf(sf, "%sCONTROL:\t\t0x%X\n", prefix, v[0]);
+	if (rich) {
+		get_values_from_reg(c->reg, 0xD4, 1, v);
+		seq_printf(sf, "LR_RICH_CONTROL:\t0x%X\n", v[0]);
+	}
+	get_values_from_reg(c->reg, 0xD8, 4, v);
+	seq_printf(sf, "%sFORMAT:\t\t0x%X\n", prefix, v[0]);
+	seq_printf(sf, "%sIT_COEFFTAB:\t\t0x%X\n", prefix, v[1]);
+	seq_printf(sf, "%sIN_SIZE:\t\t0x%X\n", prefix, v[2]);
+	seq_printf(sf, "%sPALPHA:\t\t0x%X\n", prefix, v[3]);
+
+	get_values_from_reg(c->reg, 0x100, 3, v);
+	seq_printf(sf, "%sP0_PTR_LOW:\t\t0x%X\n", prefix, v[0]);
+	seq_printf(sf, "%sP0_PTR_HIGH:\t\t0x%X\n", prefix, v[1]);
+	seq_printf(sf, "%sP0_STRIDE:\t\t0x%X\n", prefix, v[2]);
+
+	get_values_from_reg(c->reg, 0x110, 2, v);
+	seq_printf(sf, "%sP1_PTR_LOW:\t\t0x%X\n", prefix, v[0]);
+	seq_printf(sf, "%sP1_PTR_HIGH:\t\t0x%X\n", prefix, v[1]);
+	if (rich) {
+		get_values_from_reg(c->reg, 0x118, 1, v);
+		seq_printf(sf, "LR_P1_STRIDE:\t\t0x%X\n", v[0]);
+
+		get_values_from_reg(c->reg, 0x120, 2, v);
+		seq_printf(sf, "LR_P2_PTR_LOW:\t\t0x%X\n", v[0]);
+		seq_printf(sf, "LR_P2_PTR_HIGH:\t\t0x%X\n", v[1]);
+
+		get_values_from_reg(c->reg, 0x130, 12, v);
+		for (i = 0; i < 12; i++)
+			seq_printf(sf, "LR_YUV_RGB_COEFF%u:\t0x%X\n", i, v[i]);
+	}
+
+	if (rgb2rgb) {
+		get_values_from_reg(c->reg, LAYER_RGB_RGB_COEFF0, 12, v);
+		for (i = 0; i < 12; i++)
+			seq_printf(sf, "LS_RGB_RGB_COEFF%u:\t0x%X\n", i, v[i]);
+	}
+
+	get_values_from_reg(c->reg, 0x160, 3, v);
+	seq_printf(sf, "%sAD_CONTROL:\t\t0x%X\n", prefix, v[0]);
+	seq_printf(sf, "%sAD_H_CROP:\t\t0x%X\n", prefix, v[1]);
+	seq_printf(sf, "%sAD_V_CROP:\t\t0x%X\n", prefix, v[2]);
+}
+
 struct komeda_component_funcs d71_layer_funcs = {
 	.update		= d71_layer_update,
 	.disable	= d71_layer_disable,
+	.dump_register	= d71_layer_dump,
 };
 
 static int d71_layer_init(struct d71_dev *d71,
@@ -250,9 +353,46 @@ static void d71_compiz_update(struct komeda_component *c,
 	malidp_write32(reg, BLK_SIZE, HV_SIZE(st->hsize, st->vsize));
 }
 
+static void d71_compiz_dump(struct komeda_component *c, struct seq_file *sf)
+{
+	u32 v[8], i;
+
+	dump_block_header(sf, c->reg);
+
+	get_values_from_reg(c->reg, 0x80, 5, v);
+	for (i = 0; i < 5; i++)
+		seq_printf(sf, "CU_INPUT_ID%u:\t\t0x%X\n", i, v[i]);
+
+	get_values_from_reg(c->reg, 0xA0, 5, v);
+	seq_printf(sf, "CU_IRQ_RAW_STATUS:\t0x%X\n", v[0]);
+	seq_printf(sf, "CU_IRQ_CLEAR:\t\t0x%X\n", v[1]);
+	seq_printf(sf, "CU_IRQ_MASK:\t\t0x%X\n", v[2]);
+	seq_printf(sf, "CU_IRQ_STATUS:\t\t0x%X\n", v[3]);
+	seq_printf(sf, "CU_STATUS:\t\t0x%X\n", v[4]);
+
+	get_values_from_reg(c->reg, 0xD0, 2, v);
+	seq_printf(sf, "CU_CONTROL:\t\t0x%X\n", v[0]);
+	seq_printf(sf, "CU_SIZE:\t\t0x%X\n", v[1]);
+
+	get_values_from_reg(c->reg, 0xDC, 1, v);
+	seq_printf(sf, "CU_BG_COLOR:\t\t0x%X\n", v[0]);
+
+	for (i = 0, v[4] = 0xE0; i < 5; i++, v[4] += 0x10) {
+		get_values_from_reg(c->reg, v[4], 3, v);
+		seq_printf(sf, "CU_INPUT%u_SIZE:\t\t0x%X\n", i, v[0]);
+		seq_printf(sf, "CU_INPUT%u_OFFSET:\t0x%X\n", i, v[1]);
+		seq_printf(sf, "CU_INPUT%u_CONTROL:\t0x%X\n", i, v[2]);
+	}
+
+	get_values_from_reg(c->reg, 0x130, 2, v);
+	seq_printf(sf, "CU_USER_LOW:\t\t0x%X\n", v[0]);
+	seq_printf(sf, "CU_USER_HIGH:\t\t0x%X\n", v[1]);
+}
+
 struct komeda_component_funcs d71_compiz_funcs = {
 	.update		= d71_compiz_update,
 	.disable	= d71_component_disable,
+	.dump_register	= d71_compiz_dump,
 };
 
 static int d71_compiz_init(struct d71_dev *d71,
@@ -298,9 +438,37 @@ static void d71_improc_update(struct komeda_component *c,
 	malidp_write32(reg, BLK_SIZE, HV_SIZE(st->hsize, st->vsize));
 }
 
+static void d71_improc_dump(struct komeda_component *c, struct seq_file *sf)
+{
+	u32 v[12], i;
+
+	dump_block_header(sf, c->reg);
+
+	get_values_from_reg(c->reg, 0x80, 2, v);
+	seq_printf(sf, "IPS_INPUT_ID0:\t\t0x%X\n", v[0]);
+	seq_printf(sf, "IPS_INPUT_ID1:\t\t0x%X\n", v[1]);
+
+	get_values_from_reg(c->reg, 0xC0, 1, v);
+	seq_printf(sf, "IPS_INFO:\t\t0x%X\n", v[0]);
+
+	get_values_from_reg(c->reg, 0xD0, 3, v);
+	seq_printf(sf, "IPS_CONTROL:\t\t0x%X\n", v[0]);
+	seq_printf(sf, "IPS_SIZE:\t\t0x%X\n", v[1]);
+	seq_printf(sf, "IPS_DEPTH:\t\t0x%X\n", v[2]);
+
+	get_values_from_reg(c->reg, 0x130, 12, v);
+	for (i = 0; i < 12; i++)
+		seq_printf(sf, "IPS_RGB_RGB_COEFF%u:\t0x%X\n", i, v[i]);
+
+	get_values_from_reg(c->reg, 0x170, 12, v);
+	for (i = 0; i < 12; i++)
+		seq_printf(sf, "IPS_RGB_YUV_COEFF%u:\t0x%X\n", i, v[i]);
+}
+
 struct komeda_component_funcs d71_improc_funcs = {
 	.update		= d71_improc_update,
 	.disable	= d71_component_disable,
+	.dump_register	= d71_improc_dump,
 };
 
 static int d71_improc_init(struct d71_dev *d71,
@@ -373,9 +541,46 @@ static void d71_timing_ctrlr_update(struct komeda_component *c,
 	malidp_write32(reg, BLK_CONTROL, value);
 }
 
+void d71_timing_ctrlr_dump(struct komeda_component *c, struct seq_file *sf)
+{
+	u32 v[8], i;
+
+	dump_block_header(sf, c->reg);
+
+	get_values_from_reg(c->reg, 0xC0, 1, v);
+	seq_printf(sf, "BS_INFO:\t\t0x%X\n", v[0]);
+
+	get_values_from_reg(c->reg, 0xD0, 8, v);
+	seq_printf(sf, "BS_CONTROL:\t\t0x%X\n", v[0]);
+	seq_printf(sf, "BS_PROG_LINE:\t\t0x%X\n", v[1]);
+	seq_printf(sf, "BS_PREFETCH_LINE:\t0x%X\n", v[2]);
+	seq_printf(sf, "BS_BG_COLOR:\t\t0x%X\n", v[3]);
+	seq_printf(sf, "BS_ACTIVESIZE:\t\t0x%X\n", v[4]);
+	seq_printf(sf, "BS_HINTERVALS:\t\t0x%X\n", v[5]);
+	seq_printf(sf, "BS_VINTERVALS:\t\t0x%X\n", v[6]);
+	seq_printf(sf, "BS_SYNC:\t\t0x%X\n", v[7]);
+
+	get_values_from_reg(c->reg, 0x100, 3, v);
+	seq_printf(sf, "BS_DRIFT_TO:\t\t0x%X\n", v[0]);
+	seq_printf(sf, "BS_FRAME_TO:\t\t0x%X\n", v[1]);
+	seq_printf(sf, "BS_TE_TO:\t\t0x%X\n", v[2]);
+
+	get_values_from_reg(c->reg, 0x110, 3, v);
+	for (i = 0; i < 3; i++)
+		seq_printf(sf, "BS_T%u_INTERVAL:\t\t0x%X\n", i, v[i]);
+
+	get_values_from_reg(c->reg, 0x120, 5, v);
+	for (i = 0; i < 2; i++) {
+		seq_printf(sf, "BS_CRC%u_LOW:\t\t0x%X\n", i, v[i << 1]);
+		seq_printf(sf, "BS_CRC%u_HIGH:\t\t0x%X\n", i, v[(i << 1) + 1]);
+	}
+	seq_printf(sf, "BS_USER:\t\t0x%X\n", v[4]);
+}
+
 struct komeda_component_funcs d71_timing_ctrlr_funcs = {
 	.update		= d71_timing_ctrlr_update,
 	.disable	= d71_timing_ctrlr_disable,
+	.dump_register	= d71_timing_ctrlr_dump,
 };
 
 static int d71_timing_ctrlr_init(struct d71_dev *d71,
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_dev.c b/drivers/gpu/drm/arm/display/komeda/komeda_dev.c
index 01ae869b659b..a012b3bbf53b 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_dev.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_dev.c
@@ -7,8 +7,52 @@
 #include <linux/platform_device.h>
 #include <linux/of_device.h>
 #include <linux/of_graph.h>
+#ifdef CONFIG_DEBUG_FS
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+#endif
 #include "komeda_dev.h"
 
+static int komeda_register_show(struct seq_file *sf, void *x)
+{
+	struct komeda_dev *mdev = sf->private;
+	int i;
+
+	if (mdev->funcs->dump_register)
+		mdev->funcs->dump_register(mdev, sf);
+
+	for (i = 0; i < mdev->n_pipelines; i++)
+		komeda_pipeline_dump_register(mdev->pipelines[i], sf);
+
+	return 0;
+}
+
+static int komeda_register_open(struct inode *inode, struct file *filp)
+{
+	return single_open(filp, komeda_register_show, inode->i_private);
+}
+
+static const struct file_operations komeda_register_fops = {
+	.owner		= THIS_MODULE,
+	.open		= komeda_register_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
+static void komeda_debugfs_init(struct komeda_dev *mdev)
+{
+	if (!debugfs_initialized())
+		return;
+
+	mdev->debugfs_root = debugfs_create_dir("komeda", NULL);
+	if (IS_ERR_OR_NULL(mdev->debugfs_root))
+		return;
+
+	debugfs_create_file("register", 0444, mdev->debugfs_root,
+			    mdev, &komeda_register_fops);
+}
+
 static int komeda_parse_pipe_dt(struct komeda_dev *mdev, struct device_node *np)
 {
 	struct komeda_pipeline *pipe;
@@ -155,6 +199,10 @@ struct komeda_dev *komeda_dev_create(struct device *dev)
 		goto err_cleanup;
 	}
 
+#ifdef CONFIG_DEBUG_FS
+	komeda_debugfs_init(mdev);
+#endif
+
 	return mdev;
 
 err_cleanup:
@@ -168,6 +216,10 @@ void komeda_dev_destroy(struct komeda_dev *mdev)
 	struct komeda_dev_funcs *funcs = mdev->funcs;
 	int i;
 
+#ifdef CONFIG_DEBUG_FS
+	debugfs_remove_recursive(mdev->debugfs_root);
+#endif
+
 	for (i = 0; i < mdev->n_pipelines; i++) {
 		komeda_pipeline_destroy(mdev, mdev->pipelines[i]);
 		mdev->pipelines[i] = NULL;
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_dev.h b/drivers/gpu/drm/arm/display/komeda/komeda_dev.h
index 681fe022bd22..8eae2620ce77 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_dev.h
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_dev.h
@@ -103,6 +103,9 @@ struct komeda_dev_funcs {
 	int (*enable_irq)(struct komeda_dev *mdev);
 	/** @disable_irq: disable irq */
 	int (*disable_irq)(struct komeda_dev *mdev);
+
+	/** @dump_register: Optional, dump registers to seq_file */
+	void (*dump_register)(struct komeda_dev *mdev, struct seq_file *seq);
 };
 
 /**
@@ -139,6 +142,8 @@ struct komeda_dev {
 	 * destroyed by &komeda_dev_funcs.cleanup()
 	 */
 	void *chip_data;
+
+	struct dentry *debugfs_root;
 };
 
 static inline bool
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.c b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.c
index c2e469164244..06da94f509e4 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.c
@@ -273,3 +273,23 @@ int komeda_assemble_pipelines(struct komeda_dev *mdev)
 
 	return 0;
 }
+
+void komeda_pipeline_dump_register(struct komeda_pipeline *pipe,
+				   struct seq_file *sf)
+{
+	struct komeda_component *c;
+	u32 id;
+
+	seq_printf(sf, "\n======== Pipeline-%d ==========\n", pipe->id);
+
+	if (pipe->funcs && pipe->funcs->dump_register)
+		pipe->funcs->dump_register(pipe, sf);
+
+	dp_for_each_set_bit(id, pipe->avail_comps) {
+		c = komeda_pipeline_get_component(pipe, id);
+
+		seq_printf(sf, "\n------%s------\n", c->name);
+		if (c->funcs->dump_register)
+			c->funcs->dump_register(c, sf);
+	}
+}
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h
index f9b7f517a484..c30a790d0712 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h
@@ -367,6 +367,9 @@ int komeda_assemble_pipelines(struct komeda_dev *mdev);
 struct komeda_component *
 komeda_pipeline_get_component(struct komeda_pipeline *pipe, int id);
 
+void komeda_pipeline_dump_register(struct komeda_pipeline *pipe,
+				   struct seq_file *sf);
+
 /* component APIs */
 struct komeda_component *
 komeda_component_add(struct komeda_pipeline *pipe,
-- 
2.17.1

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