linux-kernel - [PATCH v2 0/2] SN65DSI86 minor fixes

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Date: Tue, 18 Jun 2024 13:44:16 +0530
From: Jayesh Choudhary <j-choudhary@...com>
To: <dianders@...omium.org>, <andrzej.hajda@...el.com>,
        <neil.armstrong@...aro.org>, <rfoss@...nel.org>,
        <Laurent.pinchart@...asonboard.com>, <mripard@...nel.org>,
        <j-choudhary@...com>
CC: <linux-kernel@...r.kernel.org>, <jonas@...boo.se>,
        <jernej.skrabec@...il.com>, <maarten.lankhorst@...ux.intel.com>,
        <tzimmermann@...e.de>, <airlied@...il.com>, <daniel@...ll.ch>,
        <spanda@...eaurora.org>, <a-bhatia1@...com>,
        <dri-devel@...ts.freedesktop.org>
Subject: [PATCH v2 0/2] SN65DSI86 minor fixes

Hello All,

These 2 patches add the atomic check hook for sn65dsi86 bridge and
does a minor math fix for dsi rate calculation.

According to the datasheet[0], for the max resolution, it says:
  Suitable for 60 fps 4K 4096 x 2304 resolution at 18
  bpp color, and WUXGA 1920 x 1200 resolution
  with 3D graphics at 60 fps (120 fps equivalent)

A very usual clock frequency for 4K@...ps resolution is 594MHz.
So keeping the max value supported by the bridge as 600MHz for
safe check.

DSI clock frequency range check are as per datasheet[0].

Changelog v1->v2:
- Check the value in atomic_check hook
- Fix the "Fixes" tag
- Fix MAX_DSI_CLK_RANGE to reflect actual supported value
- Add mode_clock check to ensure that the bit_rate_khz variable
  does not overflow instead of justifying by reverse calculation
  in comments.
- Fix commit message to show that the math uissue was found during
  code inspection.

v1 patch:
<https://lore.kernel.org/all/20240408073623.186489-1-j-choudhary@ti.com/>

[0]: <https://www.ti.com/lit/gpn/sn65dsi86>

Jayesh Choudhary (2):
  drm/bridge: ti-sn65dsi86: Add atomic_check hook for the bridge
  drm/bridge: ti-sn65dsi86: Fix ti_sn_bridge_set_dsi_rate function

 drivers/gpu/drm/bridge/ti-sn65dsi86.c | 67 +++++++++++++++++++--------
 1 file changed, 47 insertions(+), 20 deletions(-)

-- 
2.25.1