diff options
| -rw-r--r-- | drivers/gpu/drm/mediatek/mtk_dpi.c | 108 | ||||
| -rw-r--r-- | drivers/gpu/drm/mediatek/mtk_dpi_regs.h | 4 |
2 files changed, 112 insertions, 0 deletions
diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c index 1864eb02dbf5..fc937490feda 100644 --- a/drivers/gpu/drm/mediatek/mtk_dpi.c +++ b/drivers/gpu/drm/mediatek/mtk_dpi.c @@ -4,8 +4,10 @@ * Author: Jie Qiu <jie.qiu@mediatek.com> */ +#include <linux/bitfield.h> #include <linux/clk.h> #include <linux/component.h> +#include <linux/debugfs.h> #include <linux/interrupt.h> #include <linux/kernel.h> #include <linux/media-bus-format.h> @@ -166,6 +168,18 @@ static void mtk_dpi_mask(struct mtk_dpi *dpi, u32 offset, u32 val, u32 mask) writel(tmp, dpi->regs + offset); } +static void mtk_dpi_test_pattern_en(struct mtk_dpi *dpi, u8 type, bool enable) +{ + u32 val; + + if (enable) + val = FIELD_PREP(DPI_PAT_SEL, type) | DPI_PAT_EN; + else + val = 0; + + mtk_dpi_mask(dpi, DPI_PATTERN0, val, DPI_PAT_SEL | DPI_PAT_EN); +} + static void mtk_dpi_sw_reset(struct mtk_dpi *dpi, bool reset) { mtk_dpi_mask(dpi, DPI_RET, reset ? RST : 0, RST); @@ -767,6 +781,99 @@ mtk_dpi_bridge_mode_valid(struct drm_bridge *bridge, return MODE_OK; } +static int mtk_dpi_debug_tp_show(struct seq_file *m, void *arg) +{ + struct mtk_dpi *dpi = m->private; + bool en; + u32 val; + + if (!dpi) + return -EINVAL; + + val = readl(dpi->regs + DPI_PATTERN0); + en = val & DPI_PAT_EN; + val = FIELD_GET(DPI_PAT_SEL, val); + + seq_printf(m, "DPI Test Pattern: %s\n", en ? "Enabled" : "Disabled"); + + if (en) { + seq_printf(m, "Internal pattern %d: ", val); + switch (val) { + case 0: + seq_puts(m, "256 Vertical Gray\n"); + break; + case 1: + seq_puts(m, "1024 Vertical Gray\n"); + break; + case 2: + seq_puts(m, "256 Horizontal Gray\n"); + break; + case 3: + seq_puts(m, "1024 Horizontal Gray\n"); + break; + case 4: + seq_puts(m, "Vertical Color bars\n"); + break; + case 6: + seq_puts(m, "Frame border\n"); + break; + case 7: + seq_puts(m, "Dot moire\n"); + break; + default: + seq_puts(m, "Invalid selection\n"); + break; + } + } + + return 0; +} + +static ssize_t mtk_dpi_debug_tp_write(struct file *file, const char __user *ubuf, + size_t len, loff_t *offp) +{ + struct seq_file *m = file->private_data; + u32 en, type; + char buf[6]; + + if (!m || !m->private || *offp || len > sizeof(buf) - 1) + return -EINVAL; + + memset(buf, 0, sizeof(buf)); + if (copy_from_user(buf, ubuf, len)) + return -EFAULT; + + if (sscanf(buf, "%u %u", &en, &type) != 2) + return -EINVAL; + + if (en < 0 || en > 1 || type < 0 || type > 7) + return -EINVAL; + + mtk_dpi_test_pattern_en((struct mtk_dpi *)m->private, type, en); + return len; +} + +static int mtk_dpi_debug_tp_open(struct inode *inode, struct file *file) +{ + return single_open(file, mtk_dpi_debug_tp_show, inode->i_private); +} + +static const struct file_operations mtk_dpi_debug_tp_fops = { + .owner = THIS_MODULE, + .open = mtk_dpi_debug_tp_open, + .read = seq_read, + .write = mtk_dpi_debug_tp_write, + .llseek = seq_lseek, + .release = single_release, +}; + +static void mtk_dpi_debugfs_init(struct drm_bridge *bridge, struct dentry *root) +{ + struct mtk_dpi *dpi = bridge_to_dpi(bridge); + + debugfs_create_file("dpi_test_pattern", 0640, root, dpi, &mtk_dpi_debug_tp_fops); +} + static const struct drm_bridge_funcs mtk_dpi_bridge_funcs = { .attach = mtk_dpi_bridge_attach, .mode_set = mtk_dpi_bridge_mode_set, @@ -779,6 +886,7 @@ static const struct drm_bridge_funcs mtk_dpi_bridge_funcs = { .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, .atomic_reset = drm_atomic_helper_bridge_reset, + .debugfs_init = mtk_dpi_debugfs_init, }; void mtk_dpi_start(struct device *dev) diff --git a/drivers/gpu/drm/mediatek/mtk_dpi_regs.h b/drivers/gpu/drm/mediatek/mtk_dpi_regs.h index 62bd4931b344..a0b1d18bbbf7 100644 --- a/drivers/gpu/drm/mediatek/mtk_dpi_regs.h +++ b/drivers/gpu/drm/mediatek/mtk_dpi_regs.h @@ -235,4 +235,8 @@ #define MATRIX_SEL_RGB_TO_JPEG 0 #define MATRIX_SEL_RGB_TO_BT601 2 +#define DPI_PATTERN0 0xf00 +#define DPI_PAT_EN BIT(0) +#define DPI_PAT_SEL GENMASK(6, 4) + #endif /* __MTK_DPI_REGS_H */ |