linux-kernel - Re: [PATCH v2 5/7] drm/msm/dsi: add DSI support for QCS8300

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Message-ID: <565924dc-84d4-40cc-8826-5143338cca21@oss.qualcomm.com>
Date: Mon, 6 Oct 2025 10:28:47 +0200
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Ayushi Makhija <quic_amakhija@...cinc.com>, linux-arm-msm@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: robdclark@...il.com, dmitry.baryshkov@....qualcomm.com, sean@...rly.run,
        marijn.suijten@...ainline.org, andersson@...nel.org, robh@...nel.org,
        robh+dt@...nel.org, krzk+dt@...nel.org, konradybcio@...nel.org,
        conor+dt@...nel.org, andrzej.hajda@...el.com,
        neil.armstrong@...aro.org, rfoss@...nel.org,
        Laurent.pinchart@...asonboard.com, jonathan@...ek.ca, jonas@...boo.se,
        jernej.skrabec@...il.com, quic_rajeevny@...cinc.com,
        quic_vproddut@...cinc.com
Subject: Re: [PATCH v2 5/7] drm/msm/dsi: add DSI support for QCS8300

On 10/6/25 3:39 AM, Ayushi Makhija wrote:
> Add DSI Controller v2.5.1 support for QCS8300 SoC.
> 
> Signed-off-by: Ayushi Makhija <quic_amakhija@...cinc.com>
> ---
>  drivers/gpu/drm/msm/dsi/dsi_cfg.c | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
> 
> diff --git a/drivers/gpu/drm/msm/dsi/dsi_cfg.c b/drivers/gpu/drm/msm/dsi/dsi_cfg.c
> index fed8e9b67011..b60384ea0b32 100644
> --- a/drivers/gpu/drm/msm/dsi/dsi_cfg.c
> +++ b/drivers/gpu/drm/msm/dsi/dsi_cfg.c
> @@ -226,6 +226,17 @@ static const struct regulator_bulk_data sa8775p_dsi_regulators[] = {
>  	{ .supply = "refgen" },
>  };
>  
> +static const struct msm_dsi_config qcs8300_dsi_cfg = {
> +	.io_offset = DSI_6G_REG_SHIFT,
> +	.regulator_data = sa8775p_dsi_regulators,
> +	.num_regulators = ARRAY_SIZE(sa8775p_dsi_regulators),
> +	.bus_clk_names = dsi_v2_4_clk_names,
> +	.num_bus_clks = ARRAY_SIZE(dsi_v2_4_clk_names),
> +	.io_start = {
> +		{ 0xae94000},

"{ 0xae94000 },"

But there is no need to introduce this ops (vs 8775), if the secondary
IO base is never requested, it will simply be left unused

Konrad