On 03/09/2025 19:17, Prabhakar wrote: > From: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx> > > 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@xxxxxxxxxxx> > Signed-off-by: Fabrizio Castro <fabrizio.castro.jz@xxxxxxxxxxx> > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx> > Reviewed-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx> > --- > v7->v8: > - Updated commit message > - Switched to use devm_clk_get() instead of devm_clk_get_optional() > as lpclk clock is available on all SoCs. > > v6->v7: > - New patch > Note, this patch was previously part of series [0]. > [0] https://lore.kernel.org/all/20250609225630.502888-1-prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx/ > --- > drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c | 5 +++++ > 1 file changed, 5 insertions(+) > > 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), Reviewed-by: Tomi Valkeinen <tomi.valkeinen+renesas@xxxxxxxxxxxxxxxx> Tomi
