linux-kernel - [PATCH v7 0/9] drm: renesas: rz-du: mipi_dsi: Prepare driver to support RZ/V2H(P) SoC

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Message-ID: <20250609225630.502888-1-prabhakar.mahadev-lad.rj@bp.renesas.com>
Date: Mon,  9 Jun 2025 23:56:21 +0100
From: Prabhakar <prabhakar.csengg@...il.com>
To: Biju Das <biju.das.jz@...renesas.com>,
	Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Magnus Damm <magnus.damm@...il.com>,
	dri-devel@...ts.freedesktop.org
Cc: linux-renesas-soc@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Prabhakar <prabhakar.csengg@...il.com>,
	Fabrizio Castro <fabrizio.castro.jz@...esas.com>,
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: [PATCH v7 0/9] drm: renesas: rz-du: mipi_dsi: Prepare driver to support RZ/V2H(P) SoC

From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>

Hi All,

This patch series prepares the MIPI DSI driver to support the Renesas
RZ/V2H(P) SoC. These patches were originally part of series [0], but I have
split them into two parts to make them easier to review and merge.

v6->v7:
- Rebased the changes on drm-misc/next
- Dropped DU patches as they are already applied
- Fixed revie comments from Laurent
- Dropped patch 12/12 from v6 "drm: renesas: rz-du: mipi_dsi: Add
  support for LPCLK clock handling" as suggested by Laurent

v5->v6:
- Added reviewed tag from Biju and Laurent
- Updated commit messages
- Dropped parentheses around the calculation
- Added min_dclk above max_dclk in rzg2l_mipi_dsi_hw_info
- Renamed dphy_late_init to dphy_startup_late_init

v4->v5:
- Split up the series
- Added Reviewed-by tag from Biju
- Dropped feature flags for reset and LPCLK
- Patch 07/12 is new.

v3->v4:
- Corrected parameter name in rzv2h_dsi_get_pll_parameters_values()
  description freq_millihz
- Used MILLI instead of KILO
- Made use of mul_u32_u32() for multiplication
- In rzv2h_dphy_find_ulpsexit() made the array static const.

v2->v3:
- Update the commit message for patch 1/15 to clarify the purpose
  of `renesas-rzv2h-dsi.h` header
- Used mul_u32_u32() in rzv2h_cpg_plldsi_div_determine_rate()
- Replaced *_mhz to *_millihz for clarity
- Updated u64->u32 for fvco limits
- Initialized the members in declaration order for
  RZV2H_CPG_PLL_DSI_LIMITS() macro
- Used clk_div_mask() in rzv2h_cpg_plldsi_div_recalc_rate()
- Replaced `unsigned long long` with u64
- Dropped rzv2h_cpg_plldsi_clk_recalc_rate() and reused
  rzv2h_cpg_pll_clk_recalc_rate() instead
- In rzv2h_cpg_plldsi_div_set_rate() followed the same style
  of RMW-operation as done in the other functions
- Renamed rzv2h_cpg_plldsi_set_rate() to rzv2h_cpg_pll_set_rate()
- Dropped rzv2h_cpg_plldsi_clk_register() and reused
  rzv2h_cpg_pll_clk_register() instead
- Added a guard in renesas-rzv2h-dsi.h header
- Reverted CSDIV0_DIVCTL2() to use DDIV_PACK()
- Renamed plleth_lpclk_div4 -> cdiv4_plleth_lpclk
- Renamed plleth_lpclk -> plleth_lpclk_gear
- Collected reviewed tag from Krzysztof for patch 3/15
- Dropped !dsi->info check in rzg2l_mipi_dsi_probe() as it
  is not needed.
- Simplified V2H DSI timings array to save space
- Switched to use fsleep() instead of udelay()

v1->v2:
- Rebased the changes on top of v6.15-rc1
- Kept the sort order for schema validation
- Added  `port@1: false` for RZ/V2H(P) SoC
- Added enum for RZ/V2H as suggested by Krzysztof as the list
  will grow in the future (while adding RZ/G3E SoC).
- Added Reviewed-by tag from Biju and Krzysztof.
- Replaced individual flags as reset flag
- Dropped unused macros
- Added missing LPCLK flag to rzvv2h info
- Dropped FCP and VSP documentation patch and sent them separately

Cheers,
Prabhakar

Lad Prabhakar (9):
  drm: renesas: rz-du: mipi_dsi: Add min check for VCLK range
  drm: renesas: rz-du: mipi_dsi: Simplify HSFREQ calculation
  drm: renesas: rz-du: mipi_dsi: Use VCLK for HSFREQ calculation
  drm: renesas: rz-du: mipi_dsi: Add OF data support
  drm: renesas: rz-du: mipi_dsi: Make "rst" reset control optional for
    RZ/V2H(P)
  drm: renesas: rz-du: mipi_dsi: Use mHz for D-PHY frequency
    calculations
  drm: renesas: rz-du: mipi_dsi: Add feature flag for 16BPP support
  drm: renesas: rz-du: mipi_dsi: Add dphy_late_init() callback for
    RZ/V2H(P)
  drm: renesas: rz-du: mipi_dsi: Add function pointers for configuring
    VCLK and mode validation

 .../gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c    | 151 +++++++++++++-----
 .../drm/renesas/rz-du/rzg2l_mipi_dsi_regs.h   |   2 -
 2 files changed, 114 insertions(+), 39 deletions(-)

-- 
2.49.0