On Tue, Nov 26, 2019 at 01:08:05PM +0100, Daniel Vetter wrote:

On Tue, Nov 26, 2019 at 10:54:47AM +0000, james qian wang (Arm Technology China) wrote:

...

From: "James Qian Wang (Arm Technology China)" james.qian.wang@arm.com

Split sysfs config_id bitfiles to multiple separated sysfs files.

Signed-off-by: James Qian Wang (Arm Technology China) james.qian.wang@arm.com

I guess Dave&my questions werent quite clear, this looks like uapi that's consumed by hwc, so the userspace needs to be open source. Plus it needs to be discussed/reviewed like any other kms uapi extensions, with a critical eye whether this makes sense to add to a supposedly cross-vendor interface.

Hi Dave & Daniel:

I think some komeda sysfs nodes can be added as cross-vendor.

- core_id: which actually is like vendor_id/subsystem_device_id/revision in PCI dev, Maybe we can add a util funcs to fake these sysfs nodes for none PCI-dev like komeda

device_info_sysfs_add(struct device *dev, u16 vendor, u16 subsystem_vendor, u16 subsystem_device, u8 revision);

The arguments: vendor: I'd like to use the PCI vendor_ID, since with that user can see a unique ID, and easy to indentify different devices. subsystem_vendor/device/revision: device specific.

- line_size. This actually is mode_config->max_width, but current drm still use this value to restrict the fb->width, but our HW supports crop, we don't have such limition. we can not set the real line_size to max_width. And I saw there is a fix: https://patchwork.freedesktop.org/patch/333454/ with this fix, we can directly use mode_config->max_width

Beside that we still needs some komeda specific node like: - aclk_hz: for expose display engine clock. - num_scalers: per pipeline scalers - num_pipes: number of display pipelines.

For the open sourced user space, we're trying to switch to drm_hwcomposer, and drop our internal hwcomposer. but that may need time. Can we start from porting our specific test to IGT for komeda private uapi coverage.

Thanks James

I suspect the right thing to do here is to push the revert. From a quick look at git history this landed together with the other kms properties in komeda which we reverted already. -Daniel

...

---

.../drm/arm/display/include/malidp_product.h | 13 --- .../gpu/drm/arm/display/komeda/komeda_sysfs.c | 80 ++++++++++++++----- 2 files changed, 62 insertions(+), 31 deletions(-)

diff --git a/drivers/gpu/drm/arm/display/include/malidp_product.h b/drivers/gpu/drm/arm/display/include/malidp_product.h index dbd3d4765065..b21f4aa15c95 100644 --- a/drivers/gpu/drm/arm/display/include/malidp_product.h +++ b/drivers/gpu/drm/arm/display/include/malidp_product.h @@ -21,17 +21,4 @@ #define MALIDP_D71_PRODUCT_ID 0x0071 #define MALIDP_D32_PRODUCT_ID 0x0032

-union komeda_config_id {

• struct {

•       __u32   max_line_sz:16,
  

•               n_pipelines:2,
  

•               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 */
  

•               side_by_side:1, /* if HW works on side_by_side mode */
  

•               reserved_bits:5;
  

• };
• __u32 value;

-};

#endif /* _MALIDP_PRODUCT_H_ */ diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_sysfs.c b/drivers/gpu/drm/arm/display/komeda/komeda_sysfs.c index 740f095b4ca5..5effab795dc1 100644 --- a/drivers/gpu/drm/arm/display/komeda/komeda_sysfs.c +++ b/drivers/gpu/drm/arm/display/komeda/komeda_sysfs.c @@ -18,28 +18,67 @@ core_id_show(struct device *dev, struct device_attribute *attr, char *buf) static DEVICE_ATTR_RO(core_id);

static ssize_t -config_id_show(struct device *dev, struct device_attribute *attr, char *buf) +line_size_show(struct device *dev, struct device_attribute *attr, char *buf) { struct komeda_dev *mdev = dev_to_mdev(dev); struct komeda_pipeline *pipe = mdev->pipelines[0];

• union komeda_config_id config_id;
• int i;
• 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;
• config_id.n_richs = 0;
• for (i = 0; i < pipe->n_layers; i++) {

• return snprintf(buf, PAGE_SIZE, "%d\n", pipe->layers[0]->hsize_in.end);

+} +static DEVICE_ATTR_RO(line_size);

+static ssize_t +n_pipelines_show(struct device *dev, struct device_attribute *attr, char *buf) +{

• struct komeda_dev *mdev = dev_to_mdev(dev);
• return snprintf(buf, PAGE_SIZE, "%d\n", mdev->n_pipelines);

+} +static DEVICE_ATTR_RO(n_pipelines);

+static ssize_t +n_layers_show(struct device *dev, struct device_attribute *attr, char *buf) +{

• struct komeda_dev *mdev = dev_to_mdev(dev);
• struct komeda_pipeline *pipe = mdev->pipelines[0];
• return snprintf(buf, PAGE_SIZE, "%d\n", pipe->n_layers);

+} +static DEVICE_ATTR_RO(n_layers);

+static ssize_t +n_rich_layers_show(struct device *dev, struct device_attribute *attr, char *buf) +{

• struct komeda_dev *mdev = dev_to_mdev(dev);
• struct komeda_pipeline *pipe = mdev->pipelines[0];
• int i, n_richs = 0;
• for (i = 0; i < pipe->n_layers; i++) if (pipe->layers[i]->layer_type == KOMEDA_FMT_RICH_LAYER)

•               config_id.n_richs++;
  

• }
• return snprintf(buf, PAGE_SIZE, "0x%08x\n", config_id.value);

•               n_richs++;
  

• return snprintf(buf, PAGE_SIZE, "%d\n", n_richs);

+} +static DEVICE_ATTR_RO(n_rich_layers);

+static ssize_t +n_scalers_show(struct device *dev, struct device_attribute *attr, char *buf) +{

• struct komeda_dev *mdev = dev_to_mdev(dev);
• struct komeda_pipeline *pipe = mdev->pipelines[0];
• return snprintf(buf, PAGE_SIZE, "%d\n", pipe->n_scalers);

+} +static DEVICE_ATTR_RO(n_scalers);

+static ssize_t +side_by_side_show(struct device *dev, struct device_attribute *attr, char *buf) +{

• struct komeda_dev *mdev = dev_to_mdev(dev);
• return snprintf(buf, PAGE_SIZE, "%d\n", mdev->side_by_side);

} -static DEVICE_ATTR_RO(config_id); +static DEVICE_ATTR_RO(side_by_side);

static ssize_t aclk_hz_show(struct device *dev, struct device_attribute *attr, char *buf) @@ -52,7 +91,12 @@ static DEVICE_ATTR_RO(aclk_hz);

static struct attribute *komeda_sysfs_entries[] = { &dev_attr_core_id.attr,

• &dev_attr_config_id.attr,

• &dev_attr_line_size.attr,
• &dev_attr_n_pipelines.attr,
• &dev_attr_n_layers.attr,
• &dev_attr_n_rich_layers.attr,
• &dev_attr_n_scalers.attr,
• &dev_attr_side_by_side.attr, &dev_attr_aclk_hz.attr, NULL,

};

2.20.1

---

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-- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch

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