From: Ma Hai mahai1@huawei.com
mainline inclusion from mainline-v5.12-rc2 commit a0d078d06e516184e2f575f3803935697b5e3ac6 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I4M6CD?from=project-issue CVE: NA
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/dr...
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Use drm_get_edid to get the resolution, if that fails, set it to a fixed resolution. Rewrite the desrtoy callback function to release resources.
Signed-off-by: Ma Hai mahai1@huawei.com Signed-off-by: Tian Tao tiantao6@hisilicon.com Reviewed-by: Thomas Zimmermann tzimmermann@suse.de Reviewed-by: Li Dongming lidongming5@huawei.com Link: https://patchwork.freedesktop.org/patch/msgid/1600778670-60370-3-git-send-em... Acked-by: Xie XiuQi xiexiuqi@huawei.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- .../gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c | 37 +++++++++++++++++-- 1 file changed, 33 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c index c8b14afbcbed..61edae1837b2 100644 --- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c +++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c @@ -21,12 +21,24 @@ static int hibmc_connector_get_modes(struct drm_connector *connector) { int count; + void *edid; + struct hibmc_connector *hibmc_connector = to_hibmc_connector(connector); + + edid = drm_get_edid(connector, &hibmc_connector->adapter); + if (edid) { + drm_connector_update_edid_property(connector, edid); + count = drm_add_edid_modes(connector, edid); + if (count) + goto out; + }
count = drm_add_modes_noedid(connector, connector->dev->mode_config.max_width, connector->dev->mode_config.max_height); drm_set_preferred_mode(connector, 1024, 768);
+out: + kfree(edid); return count; }
@@ -36,6 +48,14 @@ static enum drm_mode_status hibmc_connector_mode_valid(struct drm_connector *con return MODE_OK; }
+static void hibmc_connector_destroy(struct drm_connector *connector) +{ + struct hibmc_connector *hibmc_connector = to_hibmc_connector(connector); + + i2c_del_adapter(&hibmc_connector->adapter); + drm_connector_cleanup(connector); +} + static const struct drm_connector_helper_funcs hibmc_connector_helper_funcs = { .get_modes = hibmc_connector_get_modes, @@ -44,7 +64,7 @@ static const struct drm_connector_helper_funcs
static const struct drm_connector_funcs hibmc_connector_funcs = { .fill_modes = drm_helper_probe_single_connector_modes, - .destroy = drm_connector_cleanup, + .destroy = hibmc_connector_destroy, .reset = drm_atomic_helper_connector_reset, .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, @@ -77,10 +97,17 @@ static const struct drm_encoder_funcs hibmc_encoder_funcs = { int hibmc_vdac_init(struct hibmc_drm_private *priv) { struct drm_device *dev = priv->dev; + struct hibmc_connector *hibmc_connector = &priv->connector; struct drm_encoder *encoder = &priv->encoder; - struct drm_connector *connector = &priv->connector.base; + struct drm_connector *connector = &hibmc_connector->base; int ret;
+ ret = hibmc_ddc_create(dev, hibmc_connector); + if (ret) { + drm_err(dev, "failed to create ddc: %d\n", ret); + return ret; + } + encoder->possible_crtcs = 0x1; ret = drm_encoder_init(dev, encoder, &hibmc_encoder_funcs, DRM_MODE_ENCODER_DAC, NULL); @@ -91,8 +118,10 @@ int hibmc_vdac_init(struct hibmc_drm_private *priv)
drm_encoder_helper_add(encoder, &hibmc_encoder_helper_funcs);
- ret = drm_connector_init(dev, connector, &hibmc_connector_funcs, - DRM_MODE_CONNECTOR_VGA); + ret = drm_connector_init_with_ddc(dev, connector, + &hibmc_connector_funcs, + DRM_MODE_CONNECTOR_VGA, + &hibmc_connector->adapter); if (ret) { drm_err(dev, "failed to init connector: %d\n", ret); return ret;