From 9ad6f181ad9a19a26bda73a7b199df44ccfcdaba Mon Sep 17 00:00:00 2001
From: Javier Martinez Canillas <javierm@redhat.com>
Date: Fri, 20 May 2022 11:16:02 +0200
Subject: [PATCH] drm/st7735r: Fix module autoloading for Okaya RH128128T
Git-commit: 9ad6f181ad9a19a26bda73a7b199df44ccfcdaba
Patch-mainline: v6.0-rc1
References: git-fixes

The SPI core always reports a "MODALIAS=spi:<foo>", even if the device was
registered via OF. This means that the st7735r.ko module won't autoload if
a DT has a node with a compatible "okaya,rh128128t" string.

In that case, kmod expects a "MODALIAS=of:N*T*Cokaya,rh128128t" uevent but
instead will get a "MODALIAS=spi:rh128128t", which is not present in the
list of aliases:

  $ modinfo drivers/gpu/drm/tiny/st7735r.ko | grep alias
  alias:          of:N*T*Cokaya,rh128128tC*
  alias:          of:N*T*Cokaya,rh128128t
  alias:          of:N*T*Cjianda,jd-t18003-t01C*
  alias:          of:N*T*Cjianda,jd-t18003-t01
  alias:          spi:jd-t18003-t01

To workaround this issue, add in the SPI table an entry for that device.

Fixes: d1d511d516f7 ("drm: tiny: st7735r: Add support for Okaya RH128128T")
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: David Lechner <david@lechnology.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220520091602.179078-1-javierm@redhat.com
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/gpu/drm/tiny/st7735r.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/tiny/st7735r.c b/drivers/gpu/drm/tiny/st7735r.c
index 29d618093e94..e0f02d367d88 100644
--- a/drivers/gpu/drm/tiny/st7735r.c
+++ b/drivers/gpu/drm/tiny/st7735r.c
@@ -174,6 +174,7 @@ MODULE_DEVICE_TABLE(of, st7735r_of_match);
 
 static const struct spi_device_id st7735r_id[] = {
 	{ "jd-t18003-t01", (uintptr_t)&jd_t18003_t01_cfg },
+	{ "rh128128t", (uintptr_t)&rh128128t_cfg },
 	{ },
 };
 MODULE_DEVICE_TABLE(spi, st7735r_id);
-- 
2.35.3