On Thu, Nov 21, 2019 at 10:49:26AM +0100, Daniel Vetter wrote:
On Thu, Nov 21, 2019 at 07:12:55AM +0000, james qian wang (Arm Technology China) wrote:
There are some restrictions if HW works on side_by_side, expose it via config_id to user.
Signed-off-by: James Qian Wang (Arm Technology China) james.qian.wang@arm.com
drivers/gpu/drm/arm/display/include/malidp_product.h | 3 ++- drivers/gpu/drm/arm/display/komeda/komeda_dev.c | 1 + 2 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/arm/display/include/malidp_product.h b/drivers/gpu/drm/arm/display/include/malidp_product.h index 1053b11352eb..96e2e4016250 100644 --- a/drivers/gpu/drm/arm/display/include/malidp_product.h +++ b/drivers/gpu/drm/arm/display/include/malidp_product.h @@ -27,7 +27,8 @@ union komeda_config_id { n_scalers:2, /* number of scalers per pipeline */ n_layers:3, /* number of layers per pipeline */ n_richs:3, /* number of rich layers per pipeline */
reserved_bits:6;
side_by_side:1, /* if HW works on side_by_side mode */reserved_bits:5;}; diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_dev.c b/drivers/gpu/drm/arm/display/komeda/komeda_dev.c index c3fa4835cb8d..4dd4699d4e3d 100644 --- a/drivers/gpu/drm/arm/display/komeda/komeda_dev.c +++ b/drivers/gpu/drm/arm/display/komeda/komeda_dev.c @@ -83,6 +83,7 @@ config_id_show(struct device *dev, struct device_attribute *attr, char *buf)
Uh, this sysfs file here looks a lot like uapi for some compositor to decide what to do. Do you have the userspace for this?
Yes, our HWC driver uses this config_id and product_id for identifying the HW caps.
Also a few more thoughts on this:
- You can't just add more fields to uapi structs.
- This doesn't really feel like it was ever reviewed to fit into atomic.
- sysfs should be one value per file, not a smorgasbrod of things stuffed into a binary structure.
I will sent a series and split this struct to multiple files.
| This doesn't really feel like it was ever reviewed to fit into atomic
These values don't have atomic problem, since config_id is for representing the HW caps info, which are not configurable.
Thanks James
-Daniel
memset(&config_id, 0, sizeof(config_id)); config_id.max_line_sz = pipe->layers[0]->hsize_in.end;
- config_id.side_by_side = mdev->side_by_side; config_id.n_pipelines = mdev->n_pipelines; config_id.n_scalers = pipe->n_scalers; config_id.n_layers = pipe->n_layers;
-- 2.20.1
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-- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch
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