From c979eb60a6f358380fffd74634b956d7ab04fa4c Mon Sep 17 00:00:00 2001 From: Marek Vasut Date: Wed, 29 Oct 2025 00:28:13 +0100 Subject: [PATCH] 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: Tomi Valkeinen Signed-off-by: Marek Vasut Link: https://patch.msgid.link/20251028232959.109936-4-marek.vasut+renesas@mailbox.org Signed-off-by: Tomi Valkeinen --- drivers/gpu/drm/renesas/rcar-du/rcar_mipi_dsi.c | 4 ++-- drivers/gpu/drm/renesas/rcar-du/rcar_mipi_dsi_regs.h | 3 ++- 2 files changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/renesas/rcar-du/rcar_mipi_dsi.c b/drivers/gpu/drm/renesas/rcar-du/rcar_mipi_dsi.c index 5c73a513f678e..c24721a1eddf2 100644 --- a/drivers/gpu/drm/renesas/rcar-du/rcar_mipi_dsi.c +++ b/drivers/gpu/drm/renesas/rcar-du/rcar_mipi_dsi.c @@ -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; diff --git a/drivers/gpu/drm/renesas/rcar-du/rcar_mipi_dsi_regs.h b/drivers/gpu/drm/renesas/rcar-du/rcar_mipi_dsi_regs.h index b8a719a13c006..62341416ac6e9 100644 --- a/drivers/gpu/drm/renesas/rcar-du/rcar_mipi_dsi_regs.h +++ b/drivers/gpu/drm/renesas/rcar-du/rcar_mipi_dsi_regs.h @@ -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) -- 2.47.3