Hi,
On 10/14/2016 6:57 PM, Eugeniy Paltsev wrote:
ARC PGU driver starts crashing on initialization after
'commit e12c2f645557 ("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.
The conversion doesn't seem entirely correct. Some comments below.
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@9e00
Path: (null)
CPU: 0 PID: 1 Comm: swapper Not tainted 4.8.0-1-gb5642252fa01-dirty #8
task: 9a058000 task.stack: 9a032000
[ECR ]: 0x00220100 => Invalid Read @ 0x0004 by insn @ 0x803934e8
[EFA ]: 0x0004
[BLINK ]: drm_atomic_helper_connector_dpms+0xa6/0x230
[ERET ]: drm_atomic_helper_connector_dpms+0xa4/0x230
[STAT32]: 0x0846 : K DE E2 E1
BTA: 0x8016d949 SP: 0x9a033e34 FP: 0x
LPS: 0x8036f6fc LPE: 0x8036f700 LPC: 0x
r00: 0x8063c118 r01: 0x805b98ac r02: 0x0b11
r03: 0x r04: 0x9a010f54 r05: 0x
r06: 0x0001 r07: 0x r08: 0x0028
r09: 0x0001 r10: 0x0007 r11: 0x0054
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
---
drivers/gpu/drm/arc/arcpgu_hdmi.c | 144 +-
1 file changed, 35 insertions(+), 109 deletions(-)
diff --git a/drivers/gpu/drm/arc/arcpgu_hdmi.c
b/drivers/gpu/drm/arc/arcpgu_hdmi.c
index b7a8b2a..48a6c63 100644
--- a/drivers/gpu/drm/arc/arcpgu_hdmi.c
+++ b/drivers/gpu/drm/arc/arcpgu_hdmi.c
@@ -14,104 +14,54 @@
*
*/
+#include
#include
#include
#include
#include "arcpgu.h"
-struct arcpgu_drm_connector {
- struct drm_connector connector;
- struct drm_encoder_slave *encoder_slave;
-};
-
-static int arcpgu_drm_connector_get_modes(struct drm_connector *connector)
+static void arcpgu_drm_i2c_encoder_mode_set(struct drm_encoder *encoder,
+ struct drm_display_mode *mode,
+ struct drm_display_mode *adjusted_mode)
{
- const struct drm_encoder_slave_funcs *sfuncs;
- struct drm_encoder_slave *slave;
- struct arcpgu_drm_connector *con =
- container_of(connector, struct arcpgu_drm_connector, connector);
-
- slave = con->encoder_slave;
- if (slave == NULL) {
- dev_err(connector->dev->dev,
- "connector_get_modes: cannot find slave encoder for
connector\n");
- return 0;
- }
-
- sfuncs = slave->slave_funcs;
- if (sfuncs->get_modes == NULL)
- return 0;
-
- return sfuncs->get_modes(&slave->base, connector);
-}
-
-static enum drm_connector_status
-arcpgu_drm_connector_detect(struct drm_connector *connector, bool force)
-{
- enum drm_connector_status status = connector_status_unknown;
- const struct drm_encoder_slave_funcs *sfuncs;
- struct drm_encoder_slave *slave;
-
- struct arcpgu_drm_connector *con =
- container_of(connector, struct arcpgu_drm_connector, connector);
-
- slave = con->encoder_slave;
- if (slave == NULL) {
- dev_err(connector->dev->dev,
- "connector_detect: cannot find slave encoder for
connector\n");
- return status;
- }
+ struct drm_bridge *bridge = encoder->bridge;
- sfuncs = slave->slave_funcs;
- if (sfuncs && sfuncs->detect)
- return sfuncs->detect(&slave->base, connector);
-
- dev_err(connector->dev->dev, "connector_detect: could not detect slave
funcs\n");
- return status;
+ bridge->funcs->mode_set(bridge, mode, adjusted_mode);
The bridge functions shouldn't really be called by the kms driver.
They're called automatically by the drm core for the bridge attached
to the encoder. See mode_fixup in drivers/gpu/drm/drm_atomic_helper.c
}
-static void arcpgu_drm_connector_destroy(struct drm_connector *connector)
-{
- drm_connector_unregister(connector);
- drm_connector_cleanup(connector);
-}
-
-static const struct drm_connector_hel
