From: Miquel Raynal <miquel.ray...@bootlin.com>
The Sitronix controller expects 9-bit words, provide this as default at
probe time rather than specifying this in each and every access.
Signed-off-by: Miquel Raynal <miquel.ray...@bootlin.com>
Reviewed-by: Sam Ravnborg <s...@ravnborg.org>
Acked-by: Maxime Ripard <mrip...@kernel.org>
Reviewed-by: Sebastian Reichel <s...@kernel.org>
Tested-by: Sebastian Reichel <s...@kernel.org>
Signed-off-by: Sebastian Reichel <s...@kernel.org>
---
drivers/gpu/drm/panel/panel-sitronix-st7789v.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/panel/panel-sitronix-st7789v.c
b/drivers/gpu/drm/panel/panel-sitronix-st7789v.c
index 55e475471f43..33bdf9ee4085 100644
--- a/drivers/gpu/drm/panel/panel-sitronix-st7789v.c
+++ b/drivers/gpu/drm/panel/panel-sitronix-st7789v.c
@@ -142,7 +142,6 @@ static int st7789v_spi_write(struct st7789v *ctx, enum
st7789v_prefix prefix,
u16 txbuf = ((prefix & 1) << 8) | data;
xfer.tx_buf = &txbuf;
- xfer.bits_per_word = 9;
xfer.len = sizeof(txbuf);
return spi_sync_transfer(ctx->spi, &xfer, 1);
@@ -436,6 +435,11 @@ static int st7789v_probe(struct spi_device *spi)
spi_set_drvdata(spi, ctx);
ctx->spi = spi;
+ spi->bits_per_word = 9;
+ ret = spi_setup(spi);
+ if (ret < 0)
+ return dev_err_probe(&spi->dev, ret, "Failed to setup spi\n");
+
ctx->info = device_get_match_data(&spi->dev);
drm_panel_init(&ctx->panel, dev, &st7789v_drm_funcs,
--
2.40.1
