diff options
| author | Hans de Goede <hdegoede@redhat.com> | 2017-03-01 16:14:57 +0300 |
|---|---|---|
| committer | Jani Nikula <jani.nikula@intel.com> | 2017-03-01 16:57:46 +0300 |
| commit | 249f6962353117de4f98654b416f581f4216013c (patch) | |
| tree | bd1850a0b1bc2faa685aa9a8aab10ade628316d4 /drivers/gpu/drm/i915/intel_dsi.c | |
| parent | 9160095c0e89a4fd58b74b64645b0ceaf11d119c (diff) | |
| download | linux-249f6962353117de4f98654b416f581f4216013c.tar.xz | |
drm/i915/dsi: Document the panel enable / disable sequences from the spec
Document the DSI panel enable / disable sequences from the spec,
for easy comparison between the code and the spec.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Bob Paauwe <bob.j.paauwe@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1488374106-4949-2-git-send-email-jani.nikula@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/intel_dsi.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_dsi.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_dsi.c b/drivers/gpu/drm/i915/intel_dsi.c index 8e97bae378f1..234592c62141 100644 --- a/drivers/gpu/drm/i915/intel_dsi.c +++ b/drivers/gpu/drm/i915/intel_dsi.c @@ -725,6 +725,43 @@ static void intel_dsi_prepare(struct intel_encoder *intel_encoder, struct intel_crtc_state *pipe_config); static void intel_dsi_unprepare(struct intel_encoder *encoder); +/* + * Panel enable/disable sequences from the VBT spec. + * + * Note the spec has AssertReset / DeassertReset swapped from their + * usual naming. We use the normal names to avoid confusion (so below + * they are swapped compared to the spec). + * + * Steps starting with MIPI refer to VBT sequences, note that for v2 + * VBTs several steps which have a VBT in v2 are expected to be handled + * directly by the driver, by directly driving gpios for example. + * + * v2 video mode seq v3 video mode seq command mode seq + * - power on - MIPIPanelPowerOn - power on + * - wait t1+t2 - wait t1+t2 + * - MIPIDeassertResetPin - MIPIDeassertResetPin - MIPIDeassertResetPin + * - io lines to lp-11 - io lines to lp-11 - io lines to lp-11 + * - MIPISendInitialDcsCmds - MIPISendInitialDcsCmds - MIPISendInitialDcsCmds + * - MIPITearOn + * - MIPIDisplayOn + * - turn on DPI - turn on DPI - set pipe to dsr mode + * - MIPIDisplayOn - MIPIDisplayOn + * - wait t5 - wait t5 + * - backlight on - MIPIBacklightOn - backlight on + * ... ... ... issue mem cmds ... + * - backlight off - MIPIBacklightOff - backlight off + * - wait t6 - wait t6 + * - MIPIDisplayOff + * - turn off DPI - turn off DPI - disable pipe dsr mode + * - MIPITearOff + * - MIPIDisplayOff - MIPIDisplayOff + * - io lines to lp-00 - io lines to lp-00 - io lines to lp-00 + * - MIPIAssertResetPin - MIPIAssertResetPin - MIPIAssertResetPin + * - wait t3 - wait t3 + * - power off - MIPIPanelPowerOff - power off + * - wait t4 - wait t4 + */ + static void intel_dsi_pre_enable(struct intel_encoder *encoder, struct intel_crtc_state *pipe_config, struct drm_connector_state *conn_state) |