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.raynal@xxxxxxxxxxx>
---
drivers/gpu/drm/panel/panel-sitronix-st7789v.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/panel/panel-sitronix-st7789v.c b/drivers/gpu/drm/panel/panel-sitronix-st7789v.c
index c67b9adb157f..e9ca7ebb458a 100644
--- a/drivers/gpu/drm/panel/panel-sitronix-st7789v.c
+++ b/drivers/gpu/drm/panel/panel-sitronix-st7789v.c
@@ -138,7 +138,6 @@ static int st7789v_spi_write(struct st7789v *ctx, enum st7789v_prefix prefix,
spi_message_init(&msg);
xfer.tx_buf = &txbuf;
- xfer.bits_per_word = 9;
xfer.len = sizeof(txbuf);
spi_message_add_tail(&xfer, &msg);
@@ -365,6 +364,13 @@ 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) {
+ dev_err(&spi->dev, "spi_setup failed: %d\n", ret);
+ return ret;
+ }
+
drm_panel_init(&ctx->panel, &spi->dev, &st7789v_drm_funcs,
DRM_MODE_CONNECTOR_DPI);
--
2.34.1
