From 6b00e72e4bee08048379a6365251b195b8a946d1 Mon Sep 17 00:00:00 2001 From: Miquel Raynal Date: Fri, 14 Jul 2023 03:37:53 +0200 Subject: [PATCH] drm/panel: sitronix-st7789v: Use 9 bits per spi word by default 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 Reviewed-by: Sam Ravnborg Acked-by: Maxime Ripard Reviewed-by: Sebastian Reichel Tested-by: Sebastian Reichel Signed-off-by: Sebastian Reichel Signed-off-by: Neil Armstrong Link: https://patchwork.freedesktop.org/patch/msgid/20230714013756.1546769-17-sre@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 55e4754..33bdf9e 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, -- 2.7.4