shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-04 10:12:16 +09:00
Code Issues Packages Projects Releases Wiki Activity

drm/i915: Preserve the DDI_A_4_LANES bit from the bios

Browse Source 
commit bcf53de4e6 upstream.

Otherwise the DDI_A_4_LANES bit gets lost and we can't use > 2 lanes
on eDP. This fixes eDP on hsw with > 2 lanes.

Also s/port_reversal/saved_port_bits/ since the current name is
confusing.

Signed-off-by: Stéphane Marchesin <marcheu@chromium.org>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Zhouping Liu <zliu@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Stéphane Marchesin
2013-07-12 13:54:41 -07:00
committed by Greg Kroah-Hartman
parent 7b2b160da7
commit 6b9f3486bb
2 changed files with 7 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/gpu/drm/i915/intel_ddi.c
View File

@@ -684,7 +684,7 @@ static void intel_ddi_mode_set(struct drm_encoder *encoder,
struct intel_digital_port *intel_dig_port =
enc_to_dig_port(encoder);
intel_dp->DP = intel_dig_port->port_reversal |
intel_dp->DP = intel_dig_port->saved_port_bits |
DDI_BUF_CTL_ENABLE | DDI_BUF_EMP_400MV_0DB_HSW;
switch (intel_dp->lane_count) {
case 1:
@@ -1324,7 +1324,8 @@ static void intel_enable_ddi(struct intel_encoder *intel_encoder)
* enabling the port.
*/
I915_WRITE(DDI_BUF_CTL(port),
intel_dig_port->port_reversal | DDI_BUF_CTL_ENABLE);
intel_dig_port->saved_port_bits |
DDI_BUF_CTL_ENABLE);
} else if (type == INTEL_OUTPUT_EDP) {
struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
@@ -1543,8 +1544,9 @@ void intel_ddi_init(struct drm_device *dev, enum port port)
intel_encoder->get_hw_state = intel_ddi_get_hw_state;
intel_dig_port->port = port;
intel_dig_port->port_reversal = I915_READ(DDI_BUF_CTL(port)) &
DDI_BUF_PORT_REVERSAL;
intel_dig_port->saved_port_bits = I915_READ(DDI_BUF_CTL(port)) &
(DDI_BUF_PORT_REVERSAL |
DDI_A_4_LANES);
if (hdmi_connector)
intel_dig_port->hdmi.hdmi_reg = DDI_BUF_CTL(port);
intel_dig_port->dp.output_reg = DDI_BUF_CTL(port);

2
drivers/gpu/drm/i915/intel_drv.h
View File

@@ -426,7 +426,7 @@ struct intel_dp {
struct intel_digital_port {
struct intel_encoder base;
enum port port;
u32 port_reversal;
u32 saved_port_bits;
struct intel_dp dp;
struct intel_hdmi hdmi;
};