diff options
| author | Tatenda Chipeperekwa <tatendac@codeaurora.org> | 2017-01-30 15:52:56 -0800 |
|---|---|---|
| committer | Gerrit - the friendly Code Review server <code-review@localhost> | 2017-03-08 12:46:27 -0800 |
| commit | 2367aa4dc1cbdb850a7b7f2f2e2bd75a33fe73d7 (patch) | |
| tree | 7f4ef379ba6cb01cffd092696ea881f0c7854f91 /drivers/video/fbdev | |
| parent | cc54970685fe40a997a5d25bc4830ec56a9b63ed (diff) | |
msm: mdss: dp: set failsafe link parameters on EDID failure
Set the link parameters that correspond to the failsafe resolution
if there is a failure in reading or parsing the EDID data. This
will allow the display to be configured with the failsafe
resolution and prevent the driver from going into a bad state.
CRs-Fixed: 2002794
Change-Id: I5882e66eee6073da6484903956abdcb3db05a5ea
Signed-off-by: Tatenda Chipeperekwa <tatendac@codeaurora.org>
Diffstat (limited to 'drivers/video/fbdev')
| -rw-r--r-- | drivers/video/fbdev/msm/mdss_dp.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/drivers/video/fbdev/msm/mdss_dp.c b/drivers/video/fbdev/msm/mdss_dp.c index bd8e710870f7..e0e24e238d94 100644 --- a/drivers/video/fbdev/msm/mdss_dp.c +++ b/drivers/video/fbdev/msm/mdss_dp.c @@ -1673,6 +1673,19 @@ static void mdss_dp_set_default_resolution(struct mdss_dp_drv_pdata *dp) DEFAULT_VIDEO_RESOLUTION, true); } +static void mdss_dp_set_default_link_parameters(struct mdss_dp_drv_pdata *dp) +{ + const int default_max_link_rate = 0x6; + const int default_max_lane_count = 1; + + dp->dpcd.max_lane_count = default_max_lane_count; + dp->dpcd.max_link_rate = default_max_link_rate; + + pr_debug("max_link_rate = 0x%x, max_lane_count= 0x%x\n", + dp->dpcd.max_link_rate, + dp->dpcd.max_lane_count); +} + static int mdss_dp_edid_init(struct mdss_panel_data *pdata) { struct mdss_dp_drv_pdata *dp_drv = NULL; @@ -1878,12 +1891,16 @@ static int mdss_dp_process_hpd_high(struct mdss_dp_drv_pdata *dp) pr_debug("edid read error, setting default resolution\n"); mdss_dp_set_default_resolution(dp); + mdss_dp_set_default_link_parameters(dp); goto notify; } ret = hdmi_edid_parser(dp->panel_data.panel_info.edid_data); if (ret) { - pr_err("edid parse failed\n"); + pr_err("edid parse failed, setting default resolution\n"); + + mdss_dp_set_default_resolution(dp); + mdss_dp_set_default_link_parameters(dp); goto notify; } |