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Wed, 1 Oct 2025 12:51:36 +0200 (CEST) Date: Wed, 1 Oct 2025 12:51:30 +0200 From: Boris Brezillon To: =?UTF-8?B?QWRyacOhbg==?= Larumbe Cc: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Steven Price , kernel@collabora.com, Rob Herring , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter Subject: Re: [PATCH v4 02/10] drm/panfrost: Handle inexistent GPU during probe Message-ID: <20251001125130.76c134ae@fedora> In-Reply-To: <20251001022039.1215976-3-adrian.larumbe@collabora.com> References: <20251001022039.1215976-1-adrian.larumbe@collabora.com> <20251001022039.1215976-3-adrian.larumbe@collabora.com> Organization: Collabora X-Mailer: Claws Mail 4.3.1 (GTK 3.24.49; x86_64-redhat-linux-gnu) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On Wed, 1 Oct 2025 03:20:23 +0100 Adri=C3=A1n Larumbe wrote: > Just in case we're dealing with a yet not recognised device. >=20 > Reviewed-by: Steven Price > Signed-off-by: Adri=C3=A1n Larumbe Reviewed-by: Boris Brezillon > --- > drivers/gpu/drm/panfrost/panfrost_gpu.c | 15 +++++++++++++-- > 1 file changed, 13 insertions(+), 2 deletions(-) >=20 > diff --git a/drivers/gpu/drm/panfrost/panfrost_gpu.c b/drivers/gpu/drm/pa= nfrost/panfrost_gpu.c > index f94337a6c302..8d049a07d393 100644 > --- a/drivers/gpu/drm/panfrost/panfrost_gpu.c > +++ b/drivers/gpu/drm/panfrost/panfrost_gpu.c > @@ -240,9 +240,10 @@ static const struct panfrost_model gpu_models[] =3D { > /* MediaTek MT8188 Mali-G57 MC3 */ > GPU_MODEL(g57, 0x9093, > GPU_REV(g57, 0, 0)), > + {0}, > }; > =20 > -static void panfrost_gpu_init_features(struct panfrost_device *pfdev) > +static int panfrost_gpu_init_features(struct panfrost_device *pfdev) > { > u32 gpu_id, num_js, major, minor, status, rev; > const char *name =3D "unknown"; > @@ -327,6 +328,12 @@ static void panfrost_gpu_init_features(struct panfro= st_device *pfdev) > break; > } > =20 > + if (!model->name) { > + dev_err(pfdev->base.dev, "GPU model not found: mali-%s id rev %#x %#x\= n", > + name, gpu_id, rev); > + return -ENODEV; > + } > + > bitmap_from_u64(pfdev->features.hw_features, hw_feat); > bitmap_from_u64(pfdev->features.hw_issues, hw_issues); > =20 > @@ -347,6 +354,8 @@ static void panfrost_gpu_init_features(struct panfros= t_device *pfdev) > =20 > dev_info(pfdev->base.dev, "shader_present=3D0x%0llx l2_present=3D0x%0ll= x", > pfdev->features.shader_present, pfdev->features.l2_present); > + > + return 0; > } > =20 > void panfrost_cycle_counter_get(struct panfrost_device *pfdev) > @@ -489,7 +498,9 @@ int panfrost_gpu_init(struct panfrost_device *pfdev) > if (err) > return err; > =20 > - panfrost_gpu_init_features(pfdev); > + err =3D panfrost_gpu_init_features(pfdev); > + if (err) > + return err; > =20 > err =3D dma_set_mask_and_coherent(pfdev->base.dev, > DMA_BIT_MASK(FIELD_GET(0xff00,