Commit c979eb60 authored by Marek Vasut's avatar Marek Vasut Committed by Tomi Valkeinen
Browse files

drm/rcar-du: dsi: Document PHTR TESTDOUT as bitfield 



The register PHTR bitfield TESTDOUT is not a single bit, but a
bitfield. Add a MASK macro and a _TEST bitfield value, which is
used by the driver to poll for completion. No functional change.

Reviewed-by: default avatarTomi Valkeinen <tomi.valkeinen+renesas@ideasonboard.com>
Signed-off-by: default avatarMarek Vasut <marek.vasut+renesas@mailbox.org>
Link: https://patch.msgid.link/20251028232959.109936-4-marek.vasut+renesas@mailbox.org


Signed-off-by: default avatarTomi Valkeinen <tomi.valkeinen@ideasonboard.com>
parent 4723455e

drivers/gpu/drm/renesas/rcar-du/rcar_mipi_dsi.c

+2 −2
Original line number Diff line number Diff line
@@ -316,8 +316,8 @@ rcar_mipi_dsi_post_init_phtw_v4h(struct rcar_mipi_dsi *dsi, 
		WRITE_PHTW(0x01020100, 0x00000180);



		ret = read_poll_timeout(rcar_mipi_dsi_read, status,

					status & PHTR_TEST, 2000, 10000, false,

					dsi, PHTR);

					status & PHTR_TESTDOUT_TEST,

					2000, 10000, false, dsi, PHTR);

		if (ret < 0) {

			dev_err(dsi->dev, "failed to test PHTR\n");

			return ret;

drivers/gpu/drm/renesas/rcar-du/rcar_mipi_dsi_regs.h

+2 −1
Original line number Diff line number Diff line
@@ -293,7 +293,8 @@ 
#define PHTW_TESTDIN_CODE(x)		(((x) & 0xff) << 0)



#define PHTR				0x1038

#define PHTR_TEST			(1 << 16)

#define PHTR_TESTDOUT			(0xff << 16)

#define PHTR_TESTDOUT_TEST		(1 << 16)



#define PHTC				0x103c

#define PHTC_TESTCLR			(1 << 0)