[PATCH -next] drm: nouveau: fix disp.c build when NOUVEAU_BACKLIGHT is not enabled
From: Randy Dunlap
Date: Wed Jul 14 2021 - 13:15:27 EST
Fix build errors and warnings when
# CONFIG_DRM_NOUVEAU_BACKLIGHT is not set
../drivers/gpu/drm/nouveau/dispnv50/disp.c: In function ‘nv50_sor_atomic_disable’:
../drivers/gpu/drm/nouveau/dispnv50/disp.c:1665:52: error: ‘struct nouveau_connector’ has no member named ‘backlight’
struct nouveau_backlight *backlight = nv_connector->backlight;
^~
../drivers/gpu/drm/nouveau/dispnv50/disp.c:1670:28: error: dereferencing pointer to incomplete type ‘struct nouveau_backlight’
if (backlight && backlight->uses_dpcd) {
and then fix subsequent build warnings after the above are fixed:
../drivers/gpu/drm/nouveau/dispnv50/disp.c: In function ‘nv50_sor_atomic_disable’:
../drivers/gpu/drm/nouveau/dispnv50/disp.c:1669:6: warning: unused variable ‘ret’ [-Wunused-variable]
int ret;
^~~
../drivers/gpu/drm/nouveau/dispnv50/disp.c:1662:22: warning: unused variable ‘drm’ [-Wunused-variable]
struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
^~~
Fixes: 6eca310e8924 ("drm/nouveau/kms/nv50-: Add basic DPCD backlight support for nouveau")
Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Cc: Ben Skeggs <bskeggs@xxxxxxxxxx>
Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
Cc: nouveau@xxxxxxxxxxxxxxxxxxxxx
Cc: Lyude Paul <lyude@xxxxxxxxxx>
---
drivers/gpu/drm/nouveau/dispnv50/disp.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
--- linux-next-20210714.orig/drivers/gpu/drm/nouveau/dispnv50/disp.c
+++ linux-next-20210714/drivers/gpu/drm/nouveau/dispnv50/disp.c
@@ -1659,23 +1659,27 @@ static void
nv50_sor_atomic_disable(struct drm_encoder *encoder, struct drm_atomic_state *state)
{
struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
- struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
struct nouveau_crtc *nv_crtc = nouveau_crtc(nv_encoder->crtc);
struct nouveau_connector *nv_connector = nv50_outp_get_old_connector(state, nv_encoder);
+#ifdef CONFIG_DRM_NOUVEAU_BACKLIGHT
+ struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
struct nouveau_backlight *backlight = nv_connector->backlight;
+#endif
struct drm_dp_aux *aux = &nv_connector->aux;
int ret;
u8 pwr;
+#ifdef CONFIG_DRM_NOUVEAU_BACKLIGHT
if (backlight && backlight->uses_dpcd) {
ret = drm_edp_backlight_disable(aux, &backlight->edp_info);
if (ret < 0)
NV_ERROR(drm, "Failed to disable backlight on [CONNECTOR:%d:%s]: %d\n",
nv_connector->base.base.id, nv_connector->base.name, ret);
}
+#endif
if (nv_encoder->dcb->type == DCB_OUTPUT_DP) {
- int ret = drm_dp_dpcd_readb(aux, DP_SET_POWER, &pwr);
+ ret = drm_dp_dpcd_readb(aux, DP_SET_POWER, &pwr);
if (ret == 0) {
pwr &= ~DP_SET_POWER_MASK;