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drm/tegra: dc: Implement CRC debugfs interface 

Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Thierry Reding 2015-04-01 14:59:40 +02:00
parent 5b4f516f5c
commit 6ca1f62f0d
2 changed files with 27 additions and 0 deletions
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22
drivers/gpu/drm/tegra/dc.c
View File

@ -1571,8 +1571,30 @@ static int tegra_dc_show_regs(struct seq_file *s, void *data)
return 0; return 0;
} }
static int tegra_dc_show_crc(struct seq_file *s, void *data)
{
struct drm_info_node *node = s->private;
struct tegra_dc *dc = node->info_ent->data;
u32 value;
value = DC_COM_CRC_CONTROL_ACTIVE_DATA | DC_COM_CRC_CONTROL_ENABLE;
tegra_dc_writel(dc, value, DC_COM_CRC_CONTROL);
tegra_dc_commit(dc);
drm_crtc_wait_one_vblank(&dc->base);
drm_crtc_wait_one_vblank(&dc->base);
value = tegra_dc_readl(dc, DC_COM_CRC_CHECKSUM);
seq_printf(s, "%08x\n", value);
tegra_dc_writel(dc, 0, DC_COM_CRC_CONTROL);
return 0;
}
static struct drm_info_list debugfs_files[] = { static struct drm_info_list debugfs_files[] = {
{ "regs", tegra_dc_show_regs, 0, NULL }, { "regs", tegra_dc_show_regs, 0, NULL },
{ "crc", tegra_dc_show_crc, 0, NULL },
}; };
static int tegra_dc_debugfs_init(struct tegra_dc *dc, struct drm_minor *minor) static int tegra_dc_debugfs_init(struct tegra_dc *dc, struct drm_minor *minor)

5
drivers/gpu/drm/tegra/dc.h
View File

@ -86,6 +86,11 @@
#define DC_CMD_REG_ACT_CONTROL 0x043 #define DC_CMD_REG_ACT_CONTROL 0x043
#define DC_COM_CRC_CONTROL 0x300 #define DC_COM_CRC_CONTROL 0x300
#define DC_COM_CRC_CONTROL_ALWAYS (1 << 3)
#define DC_COM_CRC_CONTROL_FULL_FRAME (0 << 2)
#define DC_COM_CRC_CONTROL_ACTIVE_DATA (1 << 2)
#define DC_COM_CRC_CONTROL_WAIT (1 << 1)
#define DC_COM_CRC_CONTROL_ENABLE (1 << 0)
#define DC_COM_CRC_CHECKSUM 0x301 #define DC_COM_CRC_CHECKSUM 0x301
#define DC_COM_PIN_OUTPUT_ENABLE(x) (0x302 + (x)) #define DC_COM_PIN_OUTPUT_ENABLE(x) (0x302 + (x))
#define DC_COM_PIN_OUTPUT_POLARITY(x) (0x306 + (x)) #define DC_COM_PIN_OUTPUT_POLARITY(x) (0x306 + (x))