Re: [PATCH v2 15/50] drm/bridge: tfp410: Replace manual connector handling with bridge

On Tue, 20 Aug 2019 04:16:46 +0300 Laurent Pinchart laurent.pinchart@ideasonboard.com wrote:

Now that a driver is available for display connectors, replace the manual connector handling code with usage of the DRM bridge API. The tfp410 driver doesn't deal with the display connector directly anymore, but still delegates drm_connector operations to the next bridge. This brings us one step closer to having the tfp410 driver handling the TFP410 only.

Signed-off-by: Laurent Pinchart laurent.pinchart@ideasonboard.com

drivers/gpu/drm/bridge/ti-tfp410.c | 195 ++++++++++------------------- 1 file changed, 68 insertions(+), 127 deletions(-)

diff --git a/drivers/gpu/drm/bridge/ti-tfp410.c b/drivers/gpu/drm/bridge/ti-tfp410.c index 4a468f44ef69..65651ae6c553 100644 --- a/drivers/gpu/drm/bridge/ti-tfp410.c +++ b/drivers/gpu/drm/bridge/ti-tfp410.c @@ -4,14 +4,12 @@

• Author: Jyri Sarha jsarha@ti.com

*/

-#include <linux/delay.h> -#include <linux/fwnode.h> #include <linux/gpio/consumer.h> #include <linux/i2c.h> -#include <linux/irq.h> #include <linux/module.h> #include <linux/of_graph.h> #include <linux/platform_device.h> +#include <linux/workqueue.h>

#include <drm/drm_atomic_helper.h> #include <drm/drm_bridge.h> @@ -24,16 +22,13 @@ struct tfp410 { struct drm_bridge bridge; struct drm_connector connector;

• unsigned int connector_type;

  u32 bus_format;

• struct i2c_adapter *ddc;

• struct gpio_desc *hpd;

• int hpd_irq; struct delayed_work hpd_work; struct gpio_desc *powerdown;

  struct drm_bridge_timings timings;

• struct drm_bridge *next_bridge;

  struct device *dev;

}; @@ -56,10 +51,10 @@ static int tfp410_get_modes(struct drm_connector *connector) struct edid *edid; int ret;

• if (!dvi->ddc)

• if (!(dvi->next_bridge->ops & DRM_BRIDGE_OP_EDID)) goto fallback;

• edid = drm_get_edid(connector, dvi->ddc);

• edid = dvi->next_bridge->funcs->get_edid(dvi->next_bridge, connector);

Can we create a drm_bridge_get_edid() wrapper for that? Something like:

int drm_bridge_get_edid(struct drm_bridge *bridge, struct drm_connector *conn) { if (!(dvi->next_bridge->ops & DRM_BRIDGE_OP_EDID)) return -ENOTSUPP;

return bridge->funcs->get_edid(bridge, connector); }

if (!edid) { dev_info(dvi->dev, "EDID read failed. Fallback to standard modes\n"); @@ -93,21 +88,10 @@ tfp410_connector_detect(struct drm_connector *connector, bool force) { struct tfp410 *dvi = drm_connector_to_tfp410(connector);

• if (dvi->hpd) {

• if (gpiod_get_value_cansleep(dvi->hpd))
  

• 	return connector_status_connected;
  

• else
  

• 	return connector_status_disconnected;
  

• }

• if (!(dvi->next_bridge->ops & DRM_BRIDGE_OP_DETECT))

• return connector_status_unknown;
  
  

• if (dvi->ddc) {

• if (drm_probe_ddc(dvi->ddc))
  

• 	return connector_status_connected;
  

• else
  

• 	return connector_status_disconnected;
  

• }
• return connector_status_unknown;

• return dvi->next_bridge->funcs->detect(dvi->next_bridge);

Same here for the detect hook.