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Commit 6ca1f62f authored by Thierry Reding's avatar Thierry Reding
Browse files

drm/tegra: dc: Implement CRC debugfs interface 



Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
parent 5b4f516f

drivers/gpu/drm/tegra/dc.c

+22 −0
Original line number Diff line number Diff line
@@ -1571,8 +1571,30 @@ static int tegra_dc_show_regs(struct seq_file *s, void *data) 
	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[] = {

	{ "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)

drivers/gpu/drm/tegra/dc.h

+5 −0
Original line number Diff line number Diff line
@@ -86,6 +86,11 @@ 
#define DC_CMD_REG_ACT_CONTROL			0x043



#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_PIN_OUTPUT_ENABLE(x) (0x302 + (x))

#define DC_COM_PIN_OUTPUT_POLARITY(x) (0x306 + (x))