[PATCH v4 0/2] gpu/drm: tegra: add DSI support for Tegra20/Tegra30

[Svyatoslav Ryhel <clamor95@gmail.com>]

Tegra20/Tegra30 DSI is quite similar to Tegra114+ apart MIPI calibration
logic and clocks. With a few minor tweaks, existing tegra DSI driver
should work on Tegra20/Tegra30 devices just fine. Tested on
Motorola Atrix 4G (T20) and ASUS VivoTab RT TF600T (T30).

This patchset depends on Tegra20/Tegra30 CSI bringup since both share
MIPI calibration logic. Ideally these patches should be picked after
CSI bringup but they will not break anything even if picked before
CSI patches.

---
Changes in v2:
- removed all MIPI calibration, it is handled within CSI bringup
- added per-soc structures into of_match
- added fix for hang caused by register access with uninited hw

Changes in v3:
- switched from version DSI to boolean flags
- added comment regarding Tegra30 clock configuration
- commits were picked:
  "clk: tegra20: reparent dsi clock to pll_d_out0"
  "ARM: tegra: adjust DSI nodes for Tegra20/Tegra30"
- commit adapted to recent DSI changes:
  "gpu/drm: tegra: dsi: move prepare function at the top of encoder
    enable" > "gpu/drm: tegra: dsi: re-add clear enable register if
    DSI was powered by bootloader"

Changes in v4:
- switched to device_get_match_data and added check
- added comment regarding Tegra124+ quirk
- adjusted commit titles and message formatting
---

Svyatoslav Ryhel (2):
  drm/tegra: dsi: add support for Tegra20/Tegra30
  drm/tegra: dsi: re-add clear enable register if DSI was powered by
    bootloader

 drivers/gpu/drm/tegra/drm.c |   2 +
 drivers/gpu/drm/tegra/dsi.c | 126 +++++++++++++++++++++++++++---------
 drivers/gpu/drm/tegra/dsi.h |  10 +++
 3 files changed, 107 insertions(+), 31 deletions(-)

-- 
2.51.0