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

[Thierry Reding <thierry.reding@gmail.com>]

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On Mon, May 11, 2026 at 10:45:35AM +0300, Svyatoslav Ryhel wrote:
> 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(-)

Applied, thanks.

Thierry

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