xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

drm/i915: workaround IGD i2c bus issue in kernel side (v2)

Browse Source 
In IGD, DPCUNIT_CLOCK_GATE_DISABLE bit should be set, otherwise i2c
access will be wrong.

v2: Disable CLOCK_GATE_DISABLE bit after bit bashing as suggested by Eric.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Shaohua Li
2009-04-07 11:02:28 +08:00
committed by Eric Anholt
parent 13f4c435eb
commit 0ba0e9e1f1
4 changed files with 25 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/gpu/drm/i915/intel_modes.c
View File

@@ -27,6 +27,7 @@
#include <linux/fb.h>
#include "drmP.h"
#include "intel_drv.h"
#include "i915_drv.h"
/**
* intel_ddc_probe
@@ -52,7 +53,10 @@ bool intel_ddc_probe(struct intel_output *intel_output)
}
};
intel_i2c_quirk_set(intel_output->ddc_bus->drm_dev, true);
ret = i2c_transfer(&intel_output->ddc_bus->adapter, msgs, 2);
intel_i2c_quirk_set(intel_output->ddc_bus->drm_dev, false);
if (ret == 2)
return true;
@@ -70,8 +74,10 @@ int intel_ddc_get_modes(struct intel_output *intel_output)
struct edid *edid;
int ret = 0;
intel_i2c_quirk_set(intel_output->ddc_bus->drm_dev, true);
edid = drm_get_edid(&intel_output->base,
&intel_output->ddc_bus->adapter);
intel_i2c_quirk_set(intel_output->ddc_bus->drm_dev, false);
if (edid) {
drm_mode_connector_update_edid_property(&intel_output->base,
edid);