Commit 7af03e688792 ("drm/probe-helper: warn about negative .get_modes()") clarified, that .get_modes callback must not return negative values on failure, so fix sub-drivers to return 0 in case of errors. This fixes strange Exynos DRM initialization failure on boot (timeout waiting for VSYNC) observed on Trats2 board.
Cc: stable@vger.kernel.org Signed-off-by: Marek Szyprowski m.szyprowski@samsung.com --- drivers/gpu/drm/exynos/exynos_drm_vidi.c | 4 ++-- drivers/gpu/drm/exynos/exynos_hdmi.c | 4 ++-- 2 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos_drm_vidi.c b/drivers/gpu/drm/exynos/exynos_drm_vidi.c index e5662bdcbbde..e3868956eb88 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_vidi.c +++ b/drivers/gpu/drm/exynos/exynos_drm_vidi.c @@ -315,14 +315,14 @@ static int vidi_get_modes(struct drm_connector *connector) */ if (!ctx->raw_edid) { DRM_DEV_DEBUG_KMS(ctx->dev, "raw_edid is null.\n"); - return -EFAULT; + return 0; }
edid_len = (1 + ctx->raw_edid->extensions) * EDID_LENGTH; edid = kmemdup(ctx->raw_edid, edid_len, GFP_KERNEL); if (!edid) { DRM_DEV_DEBUG_KMS(ctx->dev, "failed to allocate edid\n"); - return -ENOMEM; + return 0; }
drm_connector_update_edid_property(connector, edid); diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c index c5ba32fca5f3..603d8bb0b03a 100644 --- a/drivers/gpu/drm/exynos/exynos_hdmi.c +++ b/drivers/gpu/drm/exynos/exynos_hdmi.c @@ -878,11 +878,11 @@ static int hdmi_get_modes(struct drm_connector *connector) int ret;
if (!hdata->ddc_adpt) - return -ENODEV; + return 0;
edid = drm_get_edid(connector, hdata->ddc_adpt); if (!edid) - return -ENODEV; + return 0;
hdata->dvi_mode = !drm_detect_hdmi_monitor(edid); DRM_DEV_DEBUG_KMS(hdata->dev, "%s : width[%d] x height[%d]\n",
On 23.04.2024 22:44, Marek Szyprowski wrote:
Commit 7af03e688792 ("drm/probe-helper: warn about negative .get_modes()") clarified, that .get_modes callback must not return negative values on failure, so fix sub-drivers to return 0 in case of errors. This fixes strange Exynos DRM initialization failure on boot (timeout waiting for VSYNC) observed on Trats2 board.
Cc: stable@vger.kernel.org Signed-off-by: Marek Szyprowski m.szyprowski@samsung.com
Ah, I've missed that this has been already fixed in -next by the patch 13d5b040363c ("drm/exynos: do not return negative values from .get_modes()"), so ignore this one. I'm sorry for the noise.
drivers/gpu/drm/exynos/exynos_drm_vidi.c | 4 ++-- drivers/gpu/drm/exynos/exynos_hdmi.c | 4 ++-- 2 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos_drm_vidi.c b/drivers/gpu/drm/exynos/exynos_drm_vidi.c index e5662bdcbbde..e3868956eb88 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_vidi.c +++ b/drivers/gpu/drm/exynos/exynos_drm_vidi.c @@ -315,14 +315,14 @@ static int vidi_get_modes(struct drm_connector *connector) */ if (!ctx->raw_edid) { DRM_DEV_DEBUG_KMS(ctx->dev, "raw_edid is null.\n");
return -EFAULT;
return 0;edid_len = (1 + ctx->raw_edid->extensions) * EDID_LENGTH; edid = kmemdup(ctx->raw_edid, edid_len, GFP_KERNEL); if (!edid) { DRM_DEV_DEBUG_KMS(ctx->dev, "failed to allocate edid\n");
return -ENOMEM;
return 0;drm_connector_update_edid_property(connector, edid); diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c index c5ba32fca5f3..603d8bb0b03a 100644 --- a/drivers/gpu/drm/exynos/exynos_hdmi.c +++ b/drivers/gpu/drm/exynos/exynos_hdmi.c @@ -878,11 +878,11 @@ static int hdmi_get_modes(struct drm_connector *connector) int ret; if (!hdata->ddc_adpt)
return -ENODEV;
return 0;edid = drm_get_edid(connector, hdata->ddc_adpt); if (!edid)
return -ENODEV;
return 0;hdata->dvi_mode = !drm_detect_hdmi_monitor(edid); DRM_DEV_DEBUG_KMS(hdata->dev, "%s : width[%d] x height[%d]\n",
Best regards
linux-stable-mirror@lists.linaro.org
-
Marek Szyprowski