OpenCloudOS-Kernel/drivers/gpu/drm/omapdrm/dss/output.c

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OMAPDSS: outputs: Create a new entity called outputs The current OMAPDSS design contains 3 software entities: Overlays, Managers and Devices. These map to pipelines, overlay managers and the panels respectively in hardware. One or more overlays connect to a manager to represent a composition, the manager connects to a device(generally a display) to display the content. The part of DSS hardware which isn't represented by any of the above entities are interfaces/outputs that connect to an overlay manager, i.e blocks like DSI, HDMI, VENC and so on. Currently, an overlay manager directly connects to the display, and the output to which it is actually connected is ignored. The panel driver of the display is responsible of calling output specific functions to configure the output. Adding outputs as a new software entity gives us the following benefits: - Have exact information on the possible connections between managers and outputs: A manager can't connect to each and every output, there only limited hardware links between a manager's video port and some of the outputs. - Remove hacks related to connecting managers and devices: Currently, default links between managers and devices are set in a not so clean way. Matching is done via comparing the device type, and the display types supported by the manager. This isn't sufficient to establish all the possible links between managers, outputs and devices in hardware. - Make panel drivers more generic: The DSS panel drivers currently call interface/output specific functions to configure the hardware IP. When making these calls, the driver isn't actually aware of the underlying output. The output driver extracts information from the panel's omap_dss_device pointer to figure out which interface it is connected to, and then configures the corresponding output block. An example of this is when a DSI panel calls dsi functions, the dsi driver figures out whether the panel is connected to DSI1 or DSI2. This isn't correct, and having output as entities will give the panel driver the exact information on which output to configure. Having outputs also gives the opportunity to make panel drivers generic across different platforms/SoCs, this is achieved as omap specific output calls can be replaced by ops of a particular output type. - Have more complex connections between managers, outputs and devices: OMAPDSS currently doesn't support use cases like 2 outputs connect to a single device. This can be achieved by extending properties of outputs to connect to more managers or devices. - Represent writeback as an output: The writeback pipeline fits well in OMAPDSS as compared to overlays, managers or devices. Add a new struct to represent outputs. An output struct holds pointers to the manager and device structs to which it is connected. Add functions which can register/unregister an output, or look for one. Create an enum which represent each output instance. Signed-off-by: Archit Taneja <archit@ti.com>
2012-09-07 20:08:00 +08:00
/*
* Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
OMAPDSS: outputs: Create a new entity called outputs The current OMAPDSS design contains 3 software entities: Overlays, Managers and Devices. These map to pipelines, overlay managers and the panels respectively in hardware. One or more overlays connect to a manager to represent a composition, the manager connects to a device(generally a display) to display the content. The part of DSS hardware which isn't represented by any of the above entities are interfaces/outputs that connect to an overlay manager, i.e blocks like DSI, HDMI, VENC and so on. Currently, an overlay manager directly connects to the display, and the output to which it is actually connected is ignored. The panel driver of the display is responsible of calling output specific functions to configure the output. Adding outputs as a new software entity gives us the following benefits: - Have exact information on the possible connections between managers and outputs: A manager can't connect to each and every output, there only limited hardware links between a manager's video port and some of the outputs. - Remove hacks related to connecting managers and devices: Currently, default links between managers and devices are set in a not so clean way. Matching is done via comparing the device type, and the display types supported by the manager. This isn't sufficient to establish all the possible links between managers, outputs and devices in hardware. - Make panel drivers more generic: The DSS panel drivers currently call interface/output specific functions to configure the hardware IP. When making these calls, the driver isn't actually aware of the underlying output. The output driver extracts information from the panel's omap_dss_device pointer to figure out which interface it is connected to, and then configures the corresponding output block. An example of this is when a DSI panel calls dsi functions, the dsi driver figures out whether the panel is connected to DSI1 or DSI2. This isn't correct, and having output as entities will give the panel driver the exact information on which output to configure. Having outputs also gives the opportunity to make panel drivers generic across different platforms/SoCs, this is achieved as omap specific output calls can be replaced by ops of a particular output type. - Have more complex connections between managers, outputs and devices: OMAPDSS currently doesn't support use cases like 2 outputs connect to a single device. This can be achieved by extending properties of outputs to connect to more managers or devices. - Represent writeback as an output: The writeback pipeline fits well in OMAPDSS as compared to overlays, managers or devices. Add a new struct to represent outputs. An output struct holds pointers to the manager and device structs to which it is connected. Add functions which can register/unregister an output, or look for one. Create an enum which represent each output instance. Signed-off-by: Archit Taneja <archit@ti.com>
2012-09-07 20:08:00 +08:00
* Author: Archit Taneja <archit@ti.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/kernel.h>
#include <linux/module.h>
OMAPDSS: outputs: Create a new entity called outputs The current OMAPDSS design contains 3 software entities: Overlays, Managers and Devices. These map to pipelines, overlay managers and the panels respectively in hardware. One or more overlays connect to a manager to represent a composition, the manager connects to a device(generally a display) to display the content. The part of DSS hardware which isn't represented by any of the above entities are interfaces/outputs that connect to an overlay manager, i.e blocks like DSI, HDMI, VENC and so on. Currently, an overlay manager directly connects to the display, and the output to which it is actually connected is ignored. The panel driver of the display is responsible of calling output specific functions to configure the output. Adding outputs as a new software entity gives us the following benefits: - Have exact information on the possible connections between managers and outputs: A manager can't connect to each and every output, there only limited hardware links between a manager's video port and some of the outputs. - Remove hacks related to connecting managers and devices: Currently, default links between managers and devices are set in a not so clean way. Matching is done via comparing the device type, and the display types supported by the manager. This isn't sufficient to establish all the possible links between managers, outputs and devices in hardware. - Make panel drivers more generic: The DSS panel drivers currently call interface/output specific functions to configure the hardware IP. When making these calls, the driver isn't actually aware of the underlying output. The output driver extracts information from the panel's omap_dss_device pointer to figure out which interface it is connected to, and then configures the corresponding output block. An example of this is when a DSI panel calls dsi functions, the dsi driver figures out whether the panel is connected to DSI1 or DSI2. This isn't correct, and having output as entities will give the panel driver the exact information on which output to configure. Having outputs also gives the opportunity to make panel drivers generic across different platforms/SoCs, this is achieved as omap specific output calls can be replaced by ops of a particular output type. - Have more complex connections between managers, outputs and devices: OMAPDSS currently doesn't support use cases like 2 outputs connect to a single device. This can be achieved by extending properties of outputs to connect to more managers or devices. - Represent writeback as an output: The writeback pipeline fits well in OMAPDSS as compared to overlays, managers or devices. Add a new struct to represent outputs. An output struct holds pointers to the manager and device structs to which it is connected. Add functions which can register/unregister an output, or look for one. Create an enum which represent each output instance. Signed-off-by: Archit Taneja <archit@ti.com>
2012-09-07 20:08:00 +08:00
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/of.h>
OMAPDSS: outputs: Create a new entity called outputs The current OMAPDSS design contains 3 software entities: Overlays, Managers and Devices. These map to pipelines, overlay managers and the panels respectively in hardware. One or more overlays connect to a manager to represent a composition, the manager connects to a device(generally a display) to display the content. The part of DSS hardware which isn't represented by any of the above entities are interfaces/outputs that connect to an overlay manager, i.e blocks like DSI, HDMI, VENC and so on. Currently, an overlay manager directly connects to the display, and the output to which it is actually connected is ignored. The panel driver of the display is responsible of calling output specific functions to configure the output. Adding outputs as a new software entity gives us the following benefits: - Have exact information on the possible connections between managers and outputs: A manager can't connect to each and every output, there only limited hardware links between a manager's video port and some of the outputs. - Remove hacks related to connecting managers and devices: Currently, default links between managers and devices are set in a not so clean way. Matching is done via comparing the device type, and the display types supported by the manager. This isn't sufficient to establish all the possible links between managers, outputs and devices in hardware. - Make panel drivers more generic: The DSS panel drivers currently call interface/output specific functions to configure the hardware IP. When making these calls, the driver isn't actually aware of the underlying output. The output driver extracts information from the panel's omap_dss_device pointer to figure out which interface it is connected to, and then configures the corresponding output block. An example of this is when a DSI panel calls dsi functions, the dsi driver figures out whether the panel is connected to DSI1 or DSI2. This isn't correct, and having output as entities will give the panel driver the exact information on which output to configure. Having outputs also gives the opportunity to make panel drivers generic across different platforms/SoCs, this is achieved as omap specific output calls can be replaced by ops of a particular output type. - Have more complex connections between managers, outputs and devices: OMAPDSS currently doesn't support use cases like 2 outputs connect to a single device. This can be achieved by extending properties of outputs to connect to more managers or devices. - Represent writeback as an output: The writeback pipeline fits well in OMAPDSS as compared to overlays, managers or devices. Add a new struct to represent outputs. An output struct holds pointers to the manager and device structs to which it is connected. Add functions which can register/unregister an output, or look for one. Create an enum which represent each output instance. Signed-off-by: Archit Taneja <archit@ti.com>
2012-09-07 20:08:00 +08:00
#include "omapdss.h"
OMAPDSS: outputs: Create a new entity called outputs The current OMAPDSS design contains 3 software entities: Overlays, Managers and Devices. These map to pipelines, overlay managers and the panels respectively in hardware. One or more overlays connect to a manager to represent a composition, the manager connects to a device(generally a display) to display the content. The part of DSS hardware which isn't represented by any of the above entities are interfaces/outputs that connect to an overlay manager, i.e blocks like DSI, HDMI, VENC and so on. Currently, an overlay manager directly connects to the display, and the output to which it is actually connected is ignored. The panel driver of the display is responsible of calling output specific functions to configure the output. Adding outputs as a new software entity gives us the following benefits: - Have exact information on the possible connections between managers and outputs: A manager can't connect to each and every output, there only limited hardware links between a manager's video port and some of the outputs. - Remove hacks related to connecting managers and devices: Currently, default links between managers and devices are set in a not so clean way. Matching is done via comparing the device type, and the display types supported by the manager. This isn't sufficient to establish all the possible links between managers, outputs and devices in hardware. - Make panel drivers more generic: The DSS panel drivers currently call interface/output specific functions to configure the hardware IP. When making these calls, the driver isn't actually aware of the underlying output. The output driver extracts information from the panel's omap_dss_device pointer to figure out which interface it is connected to, and then configures the corresponding output block. An example of this is when a DSI panel calls dsi functions, the dsi driver figures out whether the panel is connected to DSI1 or DSI2. This isn't correct, and having output as entities will give the panel driver the exact information on which output to configure. Having outputs also gives the opportunity to make panel drivers generic across different platforms/SoCs, this is achieved as omap specific output calls can be replaced by ops of a particular output type. - Have more complex connections between managers, outputs and devices: OMAPDSS currently doesn't support use cases like 2 outputs connect to a single device. This can be achieved by extending properties of outputs to connect to more managers or devices. - Represent writeback as an output: The writeback pipeline fits well in OMAPDSS as compared to overlays, managers or devices. Add a new struct to represent outputs. An output struct holds pointers to the manager and device structs to which it is connected. Add functions which can register/unregister an output, or look for one. Create an enum which represent each output instance. Signed-off-by: Archit Taneja <archit@ti.com>
2012-09-07 20:08:00 +08:00
static LIST_HEAD(output_list);
static DEFINE_MUTEX(output_lock);
int omapdss_output_set_device(struct omap_dss_device *out,
struct omap_dss_device *dssdev)
{
int r;
mutex_lock(&output_lock);
if (out->dst) {
dev_err(out->dev,
"output already has device %s connected to it\n",
out->dst->name);
r = -EINVAL;
goto err;
}
if (out->output_type != dssdev->type) {
dev_err(out->dev, "output type and display type don't match\n");
r = -EINVAL;
goto err;
}
out->dst = dssdev;
dssdev->src = out;
mutex_unlock(&output_lock);
return 0;
err:
mutex_unlock(&output_lock);
return r;
}
EXPORT_SYMBOL(omapdss_output_set_device);
int omapdss_output_unset_device(struct omap_dss_device *out)
{
int r;
mutex_lock(&output_lock);
if (!out->dst) {
dev_err(out->dev,
"output doesn't have a device connected to it\n");
r = -EINVAL;
goto err;
}
if (out->dst->state != OMAP_DSS_DISPLAY_DISABLED) {
dev_err(out->dev,
"device %s is not disabled, cannot unset device\n",
out->dst->name);
r = -EINVAL;
goto err;
}
out->dst->src = NULL;
out->dst = NULL;
mutex_unlock(&output_lock);
return 0;
err:
mutex_unlock(&output_lock);
return r;
}
EXPORT_SYMBOL(omapdss_output_unset_device);
OMAPDSS: outputs: Create a new entity called outputs The current OMAPDSS design contains 3 software entities: Overlays, Managers and Devices. These map to pipelines, overlay managers and the panels respectively in hardware. One or more overlays connect to a manager to represent a composition, the manager connects to a device(generally a display) to display the content. The part of DSS hardware which isn't represented by any of the above entities are interfaces/outputs that connect to an overlay manager, i.e blocks like DSI, HDMI, VENC and so on. Currently, an overlay manager directly connects to the display, and the output to which it is actually connected is ignored. The panel driver of the display is responsible of calling output specific functions to configure the output. Adding outputs as a new software entity gives us the following benefits: - Have exact information on the possible connections between managers and outputs: A manager can't connect to each and every output, there only limited hardware links between a manager's video port and some of the outputs. - Remove hacks related to connecting managers and devices: Currently, default links between managers and devices are set in a not so clean way. Matching is done via comparing the device type, and the display types supported by the manager. This isn't sufficient to establish all the possible links between managers, outputs and devices in hardware. - Make panel drivers more generic: The DSS panel drivers currently call interface/output specific functions to configure the hardware IP. When making these calls, the driver isn't actually aware of the underlying output. The output driver extracts information from the panel's omap_dss_device pointer to figure out which interface it is connected to, and then configures the corresponding output block. An example of this is when a DSI panel calls dsi functions, the dsi driver figures out whether the panel is connected to DSI1 or DSI2. This isn't correct, and having output as entities will give the panel driver the exact information on which output to configure. Having outputs also gives the opportunity to make panel drivers generic across different platforms/SoCs, this is achieved as omap specific output calls can be replaced by ops of a particular output type. - Have more complex connections between managers, outputs and devices: OMAPDSS currently doesn't support use cases like 2 outputs connect to a single device. This can be achieved by extending properties of outputs to connect to more managers or devices. - Represent writeback as an output: The writeback pipeline fits well in OMAPDSS as compared to overlays, managers or devices. Add a new struct to represent outputs. An output struct holds pointers to the manager and device structs to which it is connected. Add functions which can register/unregister an output, or look for one. Create an enum which represent each output instance. Signed-off-by: Archit Taneja <archit@ti.com>
2012-09-07 20:08:00 +08:00
int omapdss_register_output(struct omap_dss_device *out)
OMAPDSS: outputs: Create a new entity called outputs The current OMAPDSS design contains 3 software entities: Overlays, Managers and Devices. These map to pipelines, overlay managers and the panels respectively in hardware. One or more overlays connect to a manager to represent a composition, the manager connects to a device(generally a display) to display the content. The part of DSS hardware which isn't represented by any of the above entities are interfaces/outputs that connect to an overlay manager, i.e blocks like DSI, HDMI, VENC and so on. Currently, an overlay manager directly connects to the display, and the output to which it is actually connected is ignored. The panel driver of the display is responsible of calling output specific functions to configure the output. Adding outputs as a new software entity gives us the following benefits: - Have exact information on the possible connections between managers and outputs: A manager can't connect to each and every output, there only limited hardware links between a manager's video port and some of the outputs. - Remove hacks related to connecting managers and devices: Currently, default links between managers and devices are set in a not so clean way. Matching is done via comparing the device type, and the display types supported by the manager. This isn't sufficient to establish all the possible links between managers, outputs and devices in hardware. - Make panel drivers more generic: The DSS panel drivers currently call interface/output specific functions to configure the hardware IP. When making these calls, the driver isn't actually aware of the underlying output. The output driver extracts information from the panel's omap_dss_device pointer to figure out which interface it is connected to, and then configures the corresponding output block. An example of this is when a DSI panel calls dsi functions, the dsi driver figures out whether the panel is connected to DSI1 or DSI2. This isn't correct, and having output as entities will give the panel driver the exact information on which output to configure. Having outputs also gives the opportunity to make panel drivers generic across different platforms/SoCs, this is achieved as omap specific output calls can be replaced by ops of a particular output type. - Have more complex connections between managers, outputs and devices: OMAPDSS currently doesn't support use cases like 2 outputs connect to a single device. This can be achieved by extending properties of outputs to connect to more managers or devices. - Represent writeback as an output: The writeback pipeline fits well in OMAPDSS as compared to overlays, managers or devices. Add a new struct to represent outputs. An output struct holds pointers to the manager and device structs to which it is connected. Add functions which can register/unregister an output, or look for one. Create an enum which represent each output instance. Signed-off-by: Archit Taneja <archit@ti.com>
2012-09-07 20:08:00 +08:00
{
list_add_tail(&out->list, &output_list);
return 0;
OMAPDSS: outputs: Create a new entity called outputs The current OMAPDSS design contains 3 software entities: Overlays, Managers and Devices. These map to pipelines, overlay managers and the panels respectively in hardware. One or more overlays connect to a manager to represent a composition, the manager connects to a device(generally a display) to display the content. The part of DSS hardware which isn't represented by any of the above entities are interfaces/outputs that connect to an overlay manager, i.e blocks like DSI, HDMI, VENC and so on. Currently, an overlay manager directly connects to the display, and the output to which it is actually connected is ignored. The panel driver of the display is responsible of calling output specific functions to configure the output. Adding outputs as a new software entity gives us the following benefits: - Have exact information on the possible connections between managers and outputs: A manager can't connect to each and every output, there only limited hardware links between a manager's video port and some of the outputs. - Remove hacks related to connecting managers and devices: Currently, default links between managers and devices are set in a not so clean way. Matching is done via comparing the device type, and the display types supported by the manager. This isn't sufficient to establish all the possible links between managers, outputs and devices in hardware. - Make panel drivers more generic: The DSS panel drivers currently call interface/output specific functions to configure the hardware IP. When making these calls, the driver isn't actually aware of the underlying output. The output driver extracts information from the panel's omap_dss_device pointer to figure out which interface it is connected to, and then configures the corresponding output block. An example of this is when a DSI panel calls dsi functions, the dsi driver figures out whether the panel is connected to DSI1 or DSI2. This isn't correct, and having output as entities will give the panel driver the exact information on which output to configure. Having outputs also gives the opportunity to make panel drivers generic across different platforms/SoCs, this is achieved as omap specific output calls can be replaced by ops of a particular output type. - Have more complex connections between managers, outputs and devices: OMAPDSS currently doesn't support use cases like 2 outputs connect to a single device. This can be achieved by extending properties of outputs to connect to more managers or devices. - Represent writeback as an output: The writeback pipeline fits well in OMAPDSS as compared to overlays, managers or devices. Add a new struct to represent outputs. An output struct holds pointers to the manager and device structs to which it is connected. Add functions which can register/unregister an output, or look for one. Create an enum which represent each output instance. Signed-off-by: Archit Taneja <archit@ti.com>
2012-09-07 20:08:00 +08:00
}
EXPORT_SYMBOL(omapdss_register_output);
OMAPDSS: outputs: Create a new entity called outputs The current OMAPDSS design contains 3 software entities: Overlays, Managers and Devices. These map to pipelines, overlay managers and the panels respectively in hardware. One or more overlays connect to a manager to represent a composition, the manager connects to a device(generally a display) to display the content. The part of DSS hardware which isn't represented by any of the above entities are interfaces/outputs that connect to an overlay manager, i.e blocks like DSI, HDMI, VENC and so on. Currently, an overlay manager directly connects to the display, and the output to which it is actually connected is ignored. The panel driver of the display is responsible of calling output specific functions to configure the output. Adding outputs as a new software entity gives us the following benefits: - Have exact information on the possible connections between managers and outputs: A manager can't connect to each and every output, there only limited hardware links between a manager's video port and some of the outputs. - Remove hacks related to connecting managers and devices: Currently, default links between managers and devices are set in a not so clean way. Matching is done via comparing the device type, and the display types supported by the manager. This isn't sufficient to establish all the possible links between managers, outputs and devices in hardware. - Make panel drivers more generic: The DSS panel drivers currently call interface/output specific functions to configure the hardware IP. When making these calls, the driver isn't actually aware of the underlying output. The output driver extracts information from the panel's omap_dss_device pointer to figure out which interface it is connected to, and then configures the corresponding output block. An example of this is when a DSI panel calls dsi functions, the dsi driver figures out whether the panel is connected to DSI1 or DSI2. This isn't correct, and having output as entities will give the panel driver the exact information on which output to configure. Having outputs also gives the opportunity to make panel drivers generic across different platforms/SoCs, this is achieved as omap specific output calls can be replaced by ops of a particular output type. - Have more complex connections between managers, outputs and devices: OMAPDSS currently doesn't support use cases like 2 outputs connect to a single device. This can be achieved by extending properties of outputs to connect to more managers or devices. - Represent writeback as an output: The writeback pipeline fits well in OMAPDSS as compared to overlays, managers or devices. Add a new struct to represent outputs. An output struct holds pointers to the manager and device structs to which it is connected. Add functions which can register/unregister an output, or look for one. Create an enum which represent each output instance. Signed-off-by: Archit Taneja <archit@ti.com>
2012-09-07 20:08:00 +08:00
void omapdss_unregister_output(struct omap_dss_device *out)
OMAPDSS: outputs: Create a new entity called outputs The current OMAPDSS design contains 3 software entities: Overlays, Managers and Devices. These map to pipelines, overlay managers and the panels respectively in hardware. One or more overlays connect to a manager to represent a composition, the manager connects to a device(generally a display) to display the content. The part of DSS hardware which isn't represented by any of the above entities are interfaces/outputs that connect to an overlay manager, i.e blocks like DSI, HDMI, VENC and so on. Currently, an overlay manager directly connects to the display, and the output to which it is actually connected is ignored. The panel driver of the display is responsible of calling output specific functions to configure the output. Adding outputs as a new software entity gives us the following benefits: - Have exact information on the possible connections between managers and outputs: A manager can't connect to each and every output, there only limited hardware links between a manager's video port and some of the outputs. - Remove hacks related to connecting managers and devices: Currently, default links between managers and devices are set in a not so clean way. Matching is done via comparing the device type, and the display types supported by the manager. This isn't sufficient to establish all the possible links between managers, outputs and devices in hardware. - Make panel drivers more generic: The DSS panel drivers currently call interface/output specific functions to configure the hardware IP. When making these calls, the driver isn't actually aware of the underlying output. The output driver extracts information from the panel's omap_dss_device pointer to figure out which interface it is connected to, and then configures the corresponding output block. An example of this is when a DSI panel calls dsi functions, the dsi driver figures out whether the panel is connected to DSI1 or DSI2. This isn't correct, and having output as entities will give the panel driver the exact information on which output to configure. Having outputs also gives the opportunity to make panel drivers generic across different platforms/SoCs, this is achieved as omap specific output calls can be replaced by ops of a particular output type. - Have more complex connections between managers, outputs and devices: OMAPDSS currently doesn't support use cases like 2 outputs connect to a single device. This can be achieved by extending properties of outputs to connect to more managers or devices. - Represent writeback as an output: The writeback pipeline fits well in OMAPDSS as compared to overlays, managers or devices. Add a new struct to represent outputs. An output struct holds pointers to the manager and device structs to which it is connected. Add functions which can register/unregister an output, or look for one. Create an enum which represent each output instance. Signed-off-by: Archit Taneja <archit@ti.com>
2012-09-07 20:08:00 +08:00
{
list_del(&out->list);
}
EXPORT_SYMBOL(omapdss_unregister_output);
OMAPDSS: outputs: Create a new entity called outputs The current OMAPDSS design contains 3 software entities: Overlays, Managers and Devices. These map to pipelines, overlay managers and the panels respectively in hardware. One or more overlays connect to a manager to represent a composition, the manager connects to a device(generally a display) to display the content. The part of DSS hardware which isn't represented by any of the above entities are interfaces/outputs that connect to an overlay manager, i.e blocks like DSI, HDMI, VENC and so on. Currently, an overlay manager directly connects to the display, and the output to which it is actually connected is ignored. The panel driver of the display is responsible of calling output specific functions to configure the output. Adding outputs as a new software entity gives us the following benefits: - Have exact information on the possible connections between managers and outputs: A manager can't connect to each and every output, there only limited hardware links between a manager's video port and some of the outputs. - Remove hacks related to connecting managers and devices: Currently, default links between managers and devices are set in a not so clean way. Matching is done via comparing the device type, and the display types supported by the manager. This isn't sufficient to establish all the possible links between managers, outputs and devices in hardware. - Make panel drivers more generic: The DSS panel drivers currently call interface/output specific functions to configure the hardware IP. When making these calls, the driver isn't actually aware of the underlying output. The output driver extracts information from the panel's omap_dss_device pointer to figure out which interface it is connected to, and then configures the corresponding output block. An example of this is when a DSI panel calls dsi functions, the dsi driver figures out whether the panel is connected to DSI1 or DSI2. This isn't correct, and having output as entities will give the panel driver the exact information on which output to configure. Having outputs also gives the opportunity to make panel drivers generic across different platforms/SoCs, this is achieved as omap specific output calls can be replaced by ops of a particular output type. - Have more complex connections between managers, outputs and devices: OMAPDSS currently doesn't support use cases like 2 outputs connect to a single device. This can be achieved by extending properties of outputs to connect to more managers or devices. - Represent writeback as an output: The writeback pipeline fits well in OMAPDSS as compared to overlays, managers or devices. Add a new struct to represent outputs. An output struct holds pointers to the manager and device structs to which it is connected. Add functions which can register/unregister an output, or look for one. Create an enum which represent each output instance. Signed-off-by: Archit Taneja <archit@ti.com>
2012-09-07 20:08:00 +08:00
bool omapdss_component_is_output(struct device_node *node)
{
struct omap_dss_device *out;
list_for_each_entry(out, &output_list, list) {
if (out->dev->of_node == node)
return true;
}
return false;
}
EXPORT_SYMBOL(omapdss_component_is_output);
struct omap_dss_device *omap_dss_get_output(enum omap_dss_output_id id)
OMAPDSS: outputs: Create a new entity called outputs The current OMAPDSS design contains 3 software entities: Overlays, Managers and Devices. These map to pipelines, overlay managers and the panels respectively in hardware. One or more overlays connect to a manager to represent a composition, the manager connects to a device(generally a display) to display the content. The part of DSS hardware which isn't represented by any of the above entities are interfaces/outputs that connect to an overlay manager, i.e blocks like DSI, HDMI, VENC and so on. Currently, an overlay manager directly connects to the display, and the output to which it is actually connected is ignored. The panel driver of the display is responsible of calling output specific functions to configure the output. Adding outputs as a new software entity gives us the following benefits: - Have exact information on the possible connections between managers and outputs: A manager can't connect to each and every output, there only limited hardware links between a manager's video port and some of the outputs. - Remove hacks related to connecting managers and devices: Currently, default links between managers and devices are set in a not so clean way. Matching is done via comparing the device type, and the display types supported by the manager. This isn't sufficient to establish all the possible links between managers, outputs and devices in hardware. - Make panel drivers more generic: The DSS panel drivers currently call interface/output specific functions to configure the hardware IP. When making these calls, the driver isn't actually aware of the underlying output. The output driver extracts information from the panel's omap_dss_device pointer to figure out which interface it is connected to, and then configures the corresponding output block. An example of this is when a DSI panel calls dsi functions, the dsi driver figures out whether the panel is connected to DSI1 or DSI2. This isn't correct, and having output as entities will give the panel driver the exact information on which output to configure. Having outputs also gives the opportunity to make panel drivers generic across different platforms/SoCs, this is achieved as omap specific output calls can be replaced by ops of a particular output type. - Have more complex connections between managers, outputs and devices: OMAPDSS currently doesn't support use cases like 2 outputs connect to a single device. This can be achieved by extending properties of outputs to connect to more managers or devices. - Represent writeback as an output: The writeback pipeline fits well in OMAPDSS as compared to overlays, managers or devices. Add a new struct to represent outputs. An output struct holds pointers to the manager and device structs to which it is connected. Add functions which can register/unregister an output, or look for one. Create an enum which represent each output instance. Signed-off-by: Archit Taneja <archit@ti.com>
2012-09-07 20:08:00 +08:00
{
struct omap_dss_device *out;
OMAPDSS: outputs: Create a new entity called outputs The current OMAPDSS design contains 3 software entities: Overlays, Managers and Devices. These map to pipelines, overlay managers and the panels respectively in hardware. One or more overlays connect to a manager to represent a composition, the manager connects to a device(generally a display) to display the content. The part of DSS hardware which isn't represented by any of the above entities are interfaces/outputs that connect to an overlay manager, i.e blocks like DSI, HDMI, VENC and so on. Currently, an overlay manager directly connects to the display, and the output to which it is actually connected is ignored. The panel driver of the display is responsible of calling output specific functions to configure the output. Adding outputs as a new software entity gives us the following benefits: - Have exact information on the possible connections between managers and outputs: A manager can't connect to each and every output, there only limited hardware links between a manager's video port and some of the outputs. - Remove hacks related to connecting managers and devices: Currently, default links between managers and devices are set in a not so clean way. Matching is done via comparing the device type, and the display types supported by the manager. This isn't sufficient to establish all the possible links between managers, outputs and devices in hardware. - Make panel drivers more generic: The DSS panel drivers currently call interface/output specific functions to configure the hardware IP. When making these calls, the driver isn't actually aware of the underlying output. The output driver extracts information from the panel's omap_dss_device pointer to figure out which interface it is connected to, and then configures the corresponding output block. An example of this is when a DSI panel calls dsi functions, the dsi driver figures out whether the panel is connected to DSI1 or DSI2. This isn't correct, and having output as entities will give the panel driver the exact information on which output to configure. Having outputs also gives the opportunity to make panel drivers generic across different platforms/SoCs, this is achieved as omap specific output calls can be replaced by ops of a particular output type. - Have more complex connections between managers, outputs and devices: OMAPDSS currently doesn't support use cases like 2 outputs connect to a single device. This can be achieved by extending properties of outputs to connect to more managers or devices. - Represent writeback as an output: The writeback pipeline fits well in OMAPDSS as compared to overlays, managers or devices. Add a new struct to represent outputs. An output struct holds pointers to the manager and device structs to which it is connected. Add functions which can register/unregister an output, or look for one. Create an enum which represent each output instance. Signed-off-by: Archit Taneja <archit@ti.com>
2012-09-07 20:08:00 +08:00
list_for_each_entry(out, &output_list, list) {
if (out->id == id)
return out;
}
return NULL;
}
EXPORT_SYMBOL(omap_dss_get_output);
struct omap_dss_device *omap_dss_find_output_by_port_node(struct device_node *port)
{
struct device_node *src_node;
struct omap_dss_device *out;
u32 reg;
src_node = dss_of_port_get_parent_device(port);
if (!src_node)
return NULL;
reg = dss_of_port_get_port_number(port);
list_for_each_entry(out, &output_list, list) {
if (out->dev->of_node == src_node && out->port_num == reg) {
of_node_put(src_node);
return omap_dss_get_device(out);
}
}
of_node_put(src_node);
return NULL;
}
struct omap_dss_device *omapdss_find_output_from_display(struct omap_dss_device *dssdev)
{
while (dssdev->src)
dssdev = dssdev->src;
if (dssdev->id != 0)
return omap_dss_get_device(dssdev);
return NULL;
}
EXPORT_SYMBOL(omapdss_find_output_from_display);
static const struct dss_mgr_ops *dss_mgr_ops;
static struct omap_drm_private *dss_mgr_ops_priv;
int dss_install_mgr_ops(const struct dss_mgr_ops *mgr_ops,
struct omap_drm_private *priv)
{
if (dss_mgr_ops)
return -EBUSY;
dss_mgr_ops = mgr_ops;
dss_mgr_ops_priv = priv;
return 0;
}
EXPORT_SYMBOL(dss_install_mgr_ops);
void dss_uninstall_mgr_ops(void)
{
dss_mgr_ops = NULL;
dss_mgr_ops_priv = NULL;
}
EXPORT_SYMBOL(dss_uninstall_mgr_ops);
int dss_mgr_connect(struct omap_dss_device *dssdev, struct omap_dss_device *dst)
OMAPDSS: Implement display (dis)connect support We currently have two steps in panel initialization and startup: probing and enabling. After the panel has been probed, it's ready and can be configured and later enabled. This model is not enough with more complex display pipelines, where we may have, for example, two panels, of which only one can be used at a time, connected to the same video output. To support that kind of scenarios, we need to add new step to the initialization: connect. This patch adds support for connecting and disconnecting panels. After probe, but before connect, no panel ops should be called. When the connect is called, a proper video pipeline is established, and the panel is ready for use. If some part in the video pipeline is already connected (by some other panel), the connect call fails. One key difference with the old style setup is that connect() handles also connecting to the overlay manager. This means that the omapfb (or omapdrm) no longer needs to figure out which overlay manager to use, but it can just call connect() on the panel, and the proper overlay manager is connected by omapdss. This also allows us to add back the support for dynamic switching between two exclusive panels. However, the current panel device model is not changed to support this, as the new device model is implemented in the following patches and the old model will be removed. The new device model supports dynamic switching. Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
2013-05-08 21:23:32 +08:00
{
return dss_mgr_ops->connect(dss_mgr_ops_priv,
dssdev->dispc_channel, dst);
OMAPDSS: Implement display (dis)connect support We currently have two steps in panel initialization and startup: probing and enabling. After the panel has been probed, it's ready and can be configured and later enabled. This model is not enough with more complex display pipelines, where we may have, for example, two panels, of which only one can be used at a time, connected to the same video output. To support that kind of scenarios, we need to add new step to the initialization: connect. This patch adds support for connecting and disconnecting panels. After probe, but before connect, no panel ops should be called. When the connect is called, a proper video pipeline is established, and the panel is ready for use. If some part in the video pipeline is already connected (by some other panel), the connect call fails. One key difference with the old style setup is that connect() handles also connecting to the overlay manager. This means that the omapfb (or omapdrm) no longer needs to figure out which overlay manager to use, but it can just call connect() on the panel, and the proper overlay manager is connected by omapdss. This also allows us to add back the support for dynamic switching between two exclusive panels. However, the current panel device model is not changed to support this, as the new device model is implemented in the following patches and the old model will be removed. The new device model supports dynamic switching. Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
2013-05-08 21:23:32 +08:00
}
EXPORT_SYMBOL(dss_mgr_connect);
void dss_mgr_disconnect(struct omap_dss_device *dssdev,
struct omap_dss_device *dst)
OMAPDSS: Implement display (dis)connect support We currently have two steps in panel initialization and startup: probing and enabling. After the panel has been probed, it's ready and can be configured and later enabled. This model is not enough with more complex display pipelines, where we may have, for example, two panels, of which only one can be used at a time, connected to the same video output. To support that kind of scenarios, we need to add new step to the initialization: connect. This patch adds support for connecting and disconnecting panels. After probe, but before connect, no panel ops should be called. When the connect is called, a proper video pipeline is established, and the panel is ready for use. If some part in the video pipeline is already connected (by some other panel), the connect call fails. One key difference with the old style setup is that connect() handles also connecting to the overlay manager. This means that the omapfb (or omapdrm) no longer needs to figure out which overlay manager to use, but it can just call connect() on the panel, and the proper overlay manager is connected by omapdss. This also allows us to add back the support for dynamic switching between two exclusive panels. However, the current panel device model is not changed to support this, as the new device model is implemented in the following patches and the old model will be removed. The new device model supports dynamic switching. Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
2013-05-08 21:23:32 +08:00
{
dss_mgr_ops->disconnect(dss_mgr_ops_priv, dssdev->dispc_channel, dst);
OMAPDSS: Implement display (dis)connect support We currently have two steps in panel initialization and startup: probing and enabling. After the panel has been probed, it's ready and can be configured and later enabled. This model is not enough with more complex display pipelines, where we may have, for example, two panels, of which only one can be used at a time, connected to the same video output. To support that kind of scenarios, we need to add new step to the initialization: connect. This patch adds support for connecting and disconnecting panels. After probe, but before connect, no panel ops should be called. When the connect is called, a proper video pipeline is established, and the panel is ready for use. If some part in the video pipeline is already connected (by some other panel), the connect call fails. One key difference with the old style setup is that connect() handles also connecting to the overlay manager. This means that the omapfb (or omapdrm) no longer needs to figure out which overlay manager to use, but it can just call connect() on the panel, and the proper overlay manager is connected by omapdss. This also allows us to add back the support for dynamic switching between two exclusive panels. However, the current panel device model is not changed to support this, as the new device model is implemented in the following patches and the old model will be removed. The new device model supports dynamic switching. Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
2013-05-08 21:23:32 +08:00
}
EXPORT_SYMBOL(dss_mgr_disconnect);
void dss_mgr_set_timings(struct omap_dss_device *dssdev,
const struct videomode *vm)
{
dss_mgr_ops->set_timings(dss_mgr_ops_priv, dssdev->dispc_channel, vm);
}
EXPORT_SYMBOL(dss_mgr_set_timings);
void dss_mgr_set_lcd_config(struct omap_dss_device *dssdev,
const struct dss_lcd_mgr_config *config)
{
dss_mgr_ops->set_lcd_config(dss_mgr_ops_priv,
dssdev->dispc_channel, config);
}
EXPORT_SYMBOL(dss_mgr_set_lcd_config);
int dss_mgr_enable(struct omap_dss_device *dssdev)
{
return dss_mgr_ops->enable(dss_mgr_ops_priv, dssdev->dispc_channel);
}
EXPORT_SYMBOL(dss_mgr_enable);
void dss_mgr_disable(struct omap_dss_device *dssdev)
{
dss_mgr_ops->disable(dss_mgr_ops_priv, dssdev->dispc_channel);
}
EXPORT_SYMBOL(dss_mgr_disable);
void dss_mgr_start_update(struct omap_dss_device *dssdev)
{
dss_mgr_ops->start_update(dss_mgr_ops_priv, dssdev->dispc_channel);
}
EXPORT_SYMBOL(dss_mgr_start_update);
int dss_mgr_register_framedone_handler(struct omap_dss_device *dssdev,
void (*handler)(void *), void *data)
{
return dss_mgr_ops->register_framedone_handler(dss_mgr_ops_priv,
dssdev->dispc_channel,
handler, data);
}
EXPORT_SYMBOL(dss_mgr_register_framedone_handler);
void dss_mgr_unregister_framedone_handler(struct omap_dss_device *dssdev,
void (*handler)(void *), void *data)
{
dss_mgr_ops->unregister_framedone_handler(dss_mgr_ops_priv,
dssdev->dispc_channel,
handler, data);
}
EXPORT_SYMBOL(dss_mgr_unregister_framedone_handler);