6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Takashi Iwai tiwai@suse.de
commit 35243fc777566ccb3370e175cf591fea0f81f68c upstream.
Macbook 5,1 with MCP79 lost its backlight control since the recent change for supporting GSP-RM; it rewrote the whole nv50 backlight control code and each display engine is supposed to have an entry for IOR bl callback, but it didn't cover mcp77.
This patch adds the missing bl entry initialization for mcp77 display engine to recover the backlight control.
Fixes: 2274ce7e3681 ("drm/nouveau/disp: add output backlight control methods") Cc: stable@vger.kernel.org Link: https://bugzilla.suse.com/show_bug.cgi?id=1223838 Signed-off-by: Takashi Iwai tiwai@suse.de Signed-off-by: Danilo Krummrich dakr@kernel.org Link: https://patchwork.freedesktop.org/patch/msgid/20250102114944.11499-1-tiwai@s... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/nouveau/nvkm/engine/disp/mcp77.c | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/mcp77.c +++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/mcp77.c @@ -31,6 +31,7 @@ mcp77_sor = { .state = g94_sor_state, .power = nv50_sor_power, .clock = nv50_sor_clock, + .bl = &nv50_sor_bl, .hdmi = &g84_sor_hdmi, .dp = &g94_sor_dp, };