From 8ad6d7af58f1b79aee1d2cbbb0da234782fe06d8 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Thu, 2 Jan 2025 12:49:36 +0100 Subject: [PATCH] drm/nouveau/disp: Fix missing backlight control on Macbook 5,1 BugLink: https://bugs.launchpad.net/bugs/2107449 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 Signed-off-by: Danilo Krummrich Link: https://patchwork.freedesktop.org/patch/msgid/20250102114944.11499-1-tiwai@suse.de Signed-off-by: Greg Kroah-Hartman Signed-off-by: Koichiro Den Signed-off-by: Stefan Bader --- drivers/gpu/drm/nouveau/nvkm/engine/disp/mcp77.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/mcp77.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/mcp77.c index 841e3b69fcaf..5a0c9b8a79f3 100644 --- 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, };