This patch series adds various retries and delays in DRM and I915 layer, to handle some of the read failures while dealing with LSPCON devices.
LSPCON devices are sometimes slow to respond and the vendores expect us to retry while probing the device. The typical scenarios are getting fixed / handled with this patch series are look like this failure during LSPCON suspend/resume: [drm:drm_lspcon_get_mode] *ERROR* LSPCON read(0x80, 0x41) failed [drm:lspcon_wait_mode [i915]] *ERROR* Error reading LSPCON mode [drm:drm_lspcon_get_mode] *ERROR* LSPCON read(0x80, 0x41) failed [drm:lspcon_change_mode.constprop.4 [i915]] *ERROR* Error reading LSPCON mode [drm:lspcon_resume [i915]] *ERROR* LSPCON resume failed Setting dangerous option reset - tainting kernel Shashank Sharma (3): drm: Add retries for lspcon mode detection drm/i915: Don't give up waiting on INVALID_MODE drm/i915: Add retries for LSPCON detection drivers/gpu/drm/drm_dp_dual_mode_helper.c | 16 +++++++++++++--- drivers/gpu/drm/i915/intel_lspcon.c | 22 +++++++++++++++------- 2 files changed, 28 insertions(+), 10 deletions(-) -- 2.7.4 _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx
