drm/arcpgu: Accommodate adv7511 switch to DRM bridge
ARC PGU driver starts crashing on initialization after
'commit e12c2f6455
("drm/i2c: adv7511: Convert to drm_bridge")'
This happenes because in "arcpgu_drm_hdmi_init" function we get pointer
of "drm_i2c_encoder_driver" structure, which doesn't exist after
adv7511 hdmi encoder interface changed from slave encoder to drm bridge.
So, when we call "encoder_init" function from this structure driver
crashes.
Bootlog:
------------------------------------->8--------------------------------
[drm] Initialized drm 1.1.0 20060810
arcpgu e0017000.pgu: arc_pgu ID: 0xabbabaab
arcpgu e0017000.pgu: assigned reserved memory node frame_buffer@9e000000
Path: (null)
CPU: 0 PID: 1 Comm: swapper Not tainted 4.8.0-00001-gb5642252fa01-dirty #8
task: 9a058000 task.stack: 9a032000
[ECR ]: 0x00220100 => Invalid Read @ 0x00000004 by insn @ 0x803934e8
[EFA ]: 0x00000004
[BLINK ]: drm_atomic_helper_connector_dpms+0xa6/0x230
[ERET ]: drm_atomic_helper_connector_dpms+0xa4/0x230
[STAT32]: 0x00000846 : K DE E2 E1
BTA: 0x8016d949 SP: 0x9a033e34 FP: 0x00000000
LPS: 0x8036f6fc LPE: 0x8036f700 LPC: 0x00000000
r00: 0x8063c118 r01: 0x805b98ac r02: 0x00000b11
r03: 0x00000000 r04: 0x9a010f54 r05: 0x00000000
r06: 0x00000001 r07: 0x00000000 r08: 0x00000028
r09: 0x00000001 r10: 0x00000007 r11: 0x00000054
r12: 0x720a3033
Stack Trace:
drm_atomic_helper_connector_dpms+0xa4/0x230
arcpgu_drm_hdmi_init+0xbc/0x228
arcpgu_probe+0x168/0x244
platform_drv_probe+0x26/0x64
really_probe+0x1f0/0x32c
__driver_attach+0xa8/0xd0
bus_for_each_dev+0x3c/0x74
bus_add_driver+0xc2/0x184
driver_register+0x50/0xec
do_one_initcall+0x3a/0x120
kernel_init_freeable+0x108/0x1a0
------------------------------------->8--------------------------------
Fix ARC PGU driver to be able work with drm bridge hdmi encoder
interface. The hdmi connector code isn't needed anymore as we expect
the adv7511 bridge driver to create/manage the connector.
Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Reviewed-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
This commit is contained in:
parent
fa860a1751
commit
7bc61cc5df
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@ -14,170 +14,45 @@
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*
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*/
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#include <drm/drm_crtc_helper.h>
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#include <drm/drm_crtc.h>
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#include <drm/drm_encoder_slave.h>
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#include <drm/drm_atomic_helper.h>
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#include "arcpgu.h"
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struct arcpgu_drm_connector {
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struct drm_connector connector;
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struct drm_encoder_slave *encoder_slave;
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};
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static int arcpgu_drm_connector_get_modes(struct drm_connector *connector)
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{
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const struct drm_encoder_slave_funcs *sfuncs;
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struct drm_encoder_slave *slave;
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struct arcpgu_drm_connector *con =
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container_of(connector, struct arcpgu_drm_connector, connector);
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slave = con->encoder_slave;
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if (slave == NULL) {
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dev_err(connector->dev->dev,
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"connector_get_modes: cannot find slave encoder for connector\n");
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return 0;
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}
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sfuncs = slave->slave_funcs;
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if (sfuncs->get_modes == NULL)
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return 0;
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return sfuncs->get_modes(&slave->base, connector);
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}
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static enum drm_connector_status
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arcpgu_drm_connector_detect(struct drm_connector *connector, bool force)
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{
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enum drm_connector_status status = connector_status_unknown;
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const struct drm_encoder_slave_funcs *sfuncs;
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struct drm_encoder_slave *slave;
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struct arcpgu_drm_connector *con =
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container_of(connector, struct arcpgu_drm_connector, connector);
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slave = con->encoder_slave;
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if (slave == NULL) {
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dev_err(connector->dev->dev,
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"connector_detect: cannot find slave encoder for connector\n");
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return status;
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}
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sfuncs = slave->slave_funcs;
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if (sfuncs && sfuncs->detect)
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return sfuncs->detect(&slave->base, connector);
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dev_err(connector->dev->dev, "connector_detect: could not detect slave funcs\n");
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return status;
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}
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static void arcpgu_drm_connector_destroy(struct drm_connector *connector)
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{
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drm_connector_unregister(connector);
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drm_connector_cleanup(connector);
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}
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static const struct drm_connector_helper_funcs
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arcpgu_drm_connector_helper_funcs = {
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.get_modes = arcpgu_drm_connector_get_modes,
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};
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static const struct drm_connector_funcs arcpgu_drm_connector_funcs = {
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.dpms = drm_helper_connector_dpms,
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.reset = drm_atomic_helper_connector_reset,
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.detect = arcpgu_drm_connector_detect,
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.fill_modes = drm_helper_probe_single_connector_modes,
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.destroy = arcpgu_drm_connector_destroy,
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.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
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.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
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};
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static struct drm_encoder_helper_funcs arcpgu_drm_encoder_helper_funcs = {
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.dpms = drm_i2c_encoder_dpms,
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.mode_fixup = drm_i2c_encoder_mode_fixup,
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.mode_set = drm_i2c_encoder_mode_set,
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.prepare = drm_i2c_encoder_prepare,
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.commit = drm_i2c_encoder_commit,
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.detect = drm_i2c_encoder_detect,
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};
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static struct drm_encoder_funcs arcpgu_drm_encoder_funcs = {
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.destroy = drm_encoder_cleanup,
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};
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int arcpgu_drm_hdmi_init(struct drm_device *drm, struct device_node *np)
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{
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struct arcpgu_drm_connector *arcpgu_connector;
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struct drm_i2c_encoder_driver *driver;
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struct drm_encoder_slave *encoder;
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struct drm_connector *connector;
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struct i2c_client *i2c_slave;
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int ret;
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struct drm_encoder *encoder;
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struct drm_bridge *bridge;
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int ret = 0;
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encoder = devm_kzalloc(drm->dev, sizeof(*encoder), GFP_KERNEL);
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if (encoder == NULL)
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return -ENOMEM;
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i2c_slave = of_find_i2c_device_by_node(np);
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if (!i2c_slave || !i2c_get_clientdata(i2c_slave)) {
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dev_err(drm->dev, "failed to find i2c slave encoder\n");
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/* Locate drm bridge from the hdmi encoder DT node */
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bridge = of_drm_find_bridge(np);
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if (!bridge)
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return -EPROBE_DEFER;
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}
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if (i2c_slave->dev.driver == NULL) {
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dev_err(drm->dev, "failed to find i2c slave driver\n");
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return -EPROBE_DEFER;
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}
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driver =
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to_drm_i2c_encoder_driver(to_i2c_driver(i2c_slave->dev.driver));
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ret = driver->encoder_init(i2c_slave, drm, encoder);
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if (ret) {
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dev_err(drm->dev, "failed to initialize i2c encoder slave\n");
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return ret;
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}
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encoder->base.possible_crtcs = 1;
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encoder->base.possible_clones = 0;
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ret = drm_encoder_init(drm, &encoder->base, &arcpgu_drm_encoder_funcs,
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encoder->possible_crtcs = 1;
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encoder->possible_clones = 0;
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ret = drm_encoder_init(drm, encoder, &arcpgu_drm_encoder_funcs,
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DRM_MODE_ENCODER_TMDS, NULL);
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if (ret)
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return ret;
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drm_encoder_helper_add(&encoder->base,
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&arcpgu_drm_encoder_helper_funcs);
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/* Link drm_bridge to encoder */
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bridge->encoder = encoder;
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encoder->bridge = bridge;
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arcpgu_connector = devm_kzalloc(drm->dev, sizeof(*arcpgu_connector),
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GFP_KERNEL);
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if (!arcpgu_connector) {
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ret = -ENOMEM;
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goto error_encoder_cleanup;
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}
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ret = drm_bridge_attach(drm, bridge);
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if (ret)
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drm_encoder_cleanup(encoder);
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connector = &arcpgu_connector->connector;
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drm_connector_helper_add(connector, &arcpgu_drm_connector_helper_funcs);
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ret = drm_connector_init(drm, connector, &arcpgu_drm_connector_funcs,
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DRM_MODE_CONNECTOR_HDMIA);
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if (ret < 0) {
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dev_err(drm->dev, "failed to initialize drm connector\n");
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goto error_encoder_cleanup;
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}
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ret = drm_mode_connector_attach_encoder(connector, &encoder->base);
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if (ret < 0) {
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dev_err(drm->dev, "could not attach connector to encoder\n");
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drm_connector_unregister(connector);
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goto error_connector_cleanup;
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}
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arcpgu_connector->encoder_slave = encoder;
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return 0;
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error_connector_cleanup:
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drm_connector_cleanup(connector);
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error_encoder_cleanup:
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drm_encoder_cleanup(&encoder->base);
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return ret;
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}
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