diff options
| author | Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> | 2025-10-15 22:26:10 +0300 |
|---|---|---|
| committer | Biju Das <biju.das.jz@bp.renesas.com> | 2025-12-16 10:25:04 +0300 |
| commit | 99b98993ae010b86d0ec0d779c1c8be890057568 (patch) | |
| tree | b6ab1f4bd32507762c23c62ccc52a32f107e4f64 | |
| parent | ddeb8d5c1f97d9112b93a779c9e3dc3eaab68c19 (diff) | |
| download | linux-99b98993ae010b86d0ec0d779c1c8be890057568.tar.xz | |
drm: renesas: rz-du: mipi_dsi: Add LPCLK clock support
Add LPCLK clock handling to the RZ/G2L MIPI DSI driver to support proper
DSI timing parameter configuration on RZ/V2H SoCs. While lpclk is present
on both RZ/G2L and RZ/V2H SoCs, the RZ/V2H SoC specifically uses the lpclk
rate to configure the DSI timing parameter ULPSEXIT.
Introduce a new lpclk field in the rzg2l_mipi_dsi structure and acquire
the "lpclk" clock during probe to enable lpclk rate-based timing
calculations on RZ/V2H while maintaining compatibility with RZ/G2L.
Co-developed-by: Fabrizio Castro <fabrizio.castro.jz@renesas.com>
Signed-off-by: Fabrizio Castro <fabrizio.castro.jz@renesas.com>
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen+renesas@ideasonboard.com>
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Link: https://patch.msgid.link/20251015192611.241920-7-prabhakar.mahadev-lad.rj@bp.renesas.com
| -rw-r--r-- | drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c b/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c index 3b52dfc0ea1e..bb03b49b1e85 100644 --- a/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c +++ b/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c @@ -68,6 +68,7 @@ struct rzg2l_mipi_dsi { struct drm_bridge *next_bridge; struct clk *vclk; + struct clk *lpclk; enum mipi_dsi_pixel_format format; unsigned int num_data_lanes; @@ -979,6 +980,10 @@ static int rzg2l_mipi_dsi_probe(struct platform_device *pdev) if (IS_ERR(dsi->vclk)) return PTR_ERR(dsi->vclk); + dsi->lpclk = devm_clk_get(dsi->dev, "lpclk"); + if (IS_ERR(dsi->lpclk)) + return PTR_ERR(dsi->lpclk); + dsi->rstc = devm_reset_control_get_optional_exclusive(dsi->dev, "rst"); if (IS_ERR(dsi->rstc)) return dev_err_probe(dsi->dev, PTR_ERR(dsi->rstc), |