Re: [Linux-stm32] [PATCH RESEND v3 0/3] Update STM DSI PHY driver

On Fri, Jun 28, 2024 at 8:47 PM Philippe CORNU
[off-list ref] wrote:

On 1/29/24 11:41, Raphael Gallais-Pou wrote:

quoted

This patch series aims to add several features of the dw-mipi-dsi phy
driver that are missing or need to be updated.

First patch update a PM macro.

Second patch adds runtime PM functionality to the driver.

Third patch adds a clock provider generated by the PHY itself.  As
explained in the commit log of the second patch, a clock declaration is
missing.  Since this clock is parent of 'dsi_k', it leads to an orphan
clock.  Most importantly this patch is an anticipation for future
versions of the DSI PHY, and its inclusion within the display subsystem
and the DRM framework.

Last patch fixes a corner effect introduced previously.  Since 'dsi' and
'dsi_k' are gated by the same bit on the same register, both reference
work as peripheral clock in the device-tree.

This patch (commit id:185f99b614427360) seems to break the dsi of
stm32f469 chip.
I'm not familiar with the drm and the clock framework, maybe it's
because there is no
 "ck_dsi_phy" defined for stm32f469.
PS:  Sorry for receiving multiple copies of this email, I forgot to
use plain text mode last time.

quoted

---
Changes in v3-resend:
      - Removed last patch as it has been merged
https://lore.kernel.org/lkml/bf49f4c9-9e81-4c91-972d-13782d996aaa@foss.st.com/ (local)

Changes in v3:
      - Fix smatch warning (disable dsi->pclk when clk_register fails)

Changes in v2:
      - Added patch 1/4 to use SYSTEM_SLEEP_PM_OPS instead of old macro
        and removed __maybe_used for accordingly
      - Changed SET_RUNTIME_PM_OPS to RUNTIME_PM_OPS

Raphael Gallais-Pou (3):
   drm/stm: dsi: use new SYSTEM_SLEEP_PM_OPS() macro
   drm/stm: dsi: expose DSI PHY internal clock

Yannick Fertre (1):
   drm/stm: dsi: add pm runtime ops

  drivers/gpu/drm/stm/dw_mipi_dsi-stm.c | 279 ++++++++++++++++++++++----
  1 file changed, 238 insertions(+), 41 deletions(-)

Hi Raphaël & Yannick,
Applied on drm-misc-next.
Many thanks,
Philippe :-)
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