Re: [PATCH v3 6/6] drm: rcar-du: Add r8a779a0 device support
From: Kieran Bingham
Date: Wed Sep 22 2021 - 20:32:26 EST
On 23/09/2021 00:59, Laurent Pinchart wrote:
> Hi Kieran,
>
> Thank you for the patch.
>
> On Thu, Sep 23, 2021 at 12:47:26AM +0100, Kieran Bingham wrote:
>> From: Kieran Bingham <kieran.bingham+renesas@xxxxxxxxxxxxxxxx>
>>
>> Extend the rcar_du_device_info structure and rcar_du_output enum to
>> support DSI outputs and utilise these additions to provide support for
>> the R8A779A0 V3U platform.
>>
>> While the DIDSR register field is now named "DSI/CSI-2-TX-IF0 Dot Clock
>> Select" the existing define LVDS0 is used, and is directly compatible
>> from other DU variants.
>
> That's not true anymore :-) The paragraph can simply be dropped.
>
Agreed.
>> Signed-off-by: Kieran Bingham <kieran.bingham+renesas@xxxxxxxxxxxxxxxx>
>>
>> ---
>>
>> v3:
>> - Introduce DIDSR_LDCS_DSI macro
>>
>> v2:
>> - No longer requires a direct interface with the DSI encoder
>> - Use correct field naming (LDCS)
>> - Remove per-crtc clock feature.
>>
>> drivers/gpu/drm/rcar-du/rcar_du_crtc.h | 2 ++
>> drivers/gpu/drm/rcar-du/rcar_du_drv.c | 20 ++++++++++++++++++++
>> drivers/gpu/drm/rcar-du/rcar_du_drv.h | 2 ++
>> drivers/gpu/drm/rcar-du/rcar_du_group.c | 2 ++
>> drivers/gpu/drm/rcar-du/rcar_du_regs.h | 1 +
>> 5 files changed, 27 insertions(+)
>>
>> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.h b/drivers/gpu/drm/rcar-du/rcar_du_crtc.h
>> index 440e6b4fbb58..26e79b74898c 100644
>> --- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.h
>> +++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.h
>> @@ -96,6 +96,8 @@ struct rcar_du_crtc_state {
>> enum rcar_du_output {
>> RCAR_DU_OUTPUT_DPAD0,
>> RCAR_DU_OUTPUT_DPAD1,
>> + RCAR_DU_OUTPUT_DSI0,
>> + RCAR_DU_OUTPUT_DSI1,
>> RCAR_DU_OUTPUT_HDMI0,
>> RCAR_DU_OUTPUT_HDMI1,
>> RCAR_DU_OUTPUT_LVDS0,
>> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.c b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
>> index 8a094d5b9c77..8b4c8851b6bc 100644
>> --- a/drivers/gpu/drm/rcar-du/rcar_du_drv.c
>> +++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
>> @@ -489,6 +489,25 @@ static const struct rcar_du_device_info rcar_du_r8a7799x_info = {
>> .lvds_clk_mask = BIT(1) | BIT(0),
>> };
>>
>> +static const struct rcar_du_device_info rcar_du_r8a779a0_info = {
>> + .gen = 3,
>> + .features = RCAR_DU_FEATURE_CRTC_IRQ
>> + | RCAR_DU_FEATURE_VSP1_SOURCE,
>> + .channels_mask = BIT(1) | BIT(0),
>> + .routes = {
>> + /* R8A779A0 has two MIPI DSI outputs. */
>> + [RCAR_DU_OUTPUT_DSI0] = {
>> + .possible_crtcs = BIT(0),
>> + .port = 0,
>> + },
>> + [RCAR_DU_OUTPUT_DSI1] = {
>> + .possible_crtcs = BIT(1),
>> + .port = 1,
>> + },
>> + },
>> + .dsi_clk_mask = BIT(1) | BIT(0),
>> +};
>> +
>> static const struct of_device_id rcar_du_of_table[] = {
>> { .compatible = "renesas,du-r8a7742", .data = &rcar_du_r8a7790_info },
>> { .compatible = "renesas,du-r8a7743", .data = &rzg1_du_r8a7743_info },
>> @@ -513,6 +532,7 @@ static const struct of_device_id rcar_du_of_table[] = {
>> { .compatible = "renesas,du-r8a77980", .data = &rcar_du_r8a77970_info },
>> { .compatible = "renesas,du-r8a77990", .data = &rcar_du_r8a7799x_info },
>> { .compatible = "renesas,du-r8a77995", .data = &rcar_du_r8a7799x_info },
>> + { .compatible = "renesas,du-r8a779a0", .data = &rcar_du_r8a779a0_info },
>> { }
>> };
>>
>> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.h b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
>> index 5fe9152454ff..cf98d43d72d0 100644
>> --- a/drivers/gpu/drm/rcar-du/rcar_du_drv.h
>> +++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
>> @@ -57,6 +57,7 @@ struct rcar_du_output_routing {
>> * @routes: array of CRTC to output routes, indexed by output (RCAR_DU_OUTPUT_*)
>> * @num_lvds: number of internal LVDS encoders
>> * @dpll_mask: bit mask of DU channels equipped with a DPLL
>> + * @dsi_clk_mask: bitmask of channels that can use the DSI clock as dot clock
>> * @lvds_clk_mask: bitmask of channels that can use the LVDS clock as dot clock
>> */
>> struct rcar_du_device_info {
>> @@ -67,6 +68,7 @@ struct rcar_du_device_info {
>> struct rcar_du_output_routing routes[RCAR_DU_OUTPUT_MAX];
>> unsigned int num_lvds;
>> unsigned int dpll_mask;
>> + unsigned int dsi_clk_mask;
>> unsigned int lvds_clk_mask;
>> };
>>
>> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_group.c b/drivers/gpu/drm/rcar-du/rcar_du_group.c
>> index a984eef265d2..8665a1dd2186 100644
>> --- a/drivers/gpu/drm/rcar-du/rcar_du_group.c
>> +++ b/drivers/gpu/drm/rcar-du/rcar_du_group.c
>> @@ -124,6 +124,8 @@ static void rcar_du_group_setup_didsr(struct rcar_du_group *rgrp)
>> if (rcdu->info->lvds_clk_mask & BIT(rcrtc->index))
>> didsr |= DIDSR_LDCS_LVDS0(i)
>> | DIDSR_PDCS_CLK(i, 0);
>> + else if (rcdu->info->dsi_clk_mask & BIT(rcrtc->index))
>> + didsr |= DIDSR_LDCS_DSI(i);
>> else
>> didsr |= DIDSR_LDCS_DCLKIN(i)
>> | DIDSR_PDCS_CLK(i, 0);
>> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_regs.h b/drivers/gpu/drm/rcar-du/rcar_du_regs.h
>> index fb7c467aa484..9484215b51e2 100644
>> --- a/drivers/gpu/drm/rcar-du/rcar_du_regs.h
>> +++ b/drivers/gpu/drm/rcar-du/rcar_du_regs.h
>> @@ -258,6 +258,7 @@
>> #define DIDSR 0x20028
>> #define DIDSR_CODE (0x7790 << 16)
>> #define DIDSR_LDCS_DCLKIN(n) (0 << (8 + (n) * 2))
>> +#define DIDSR_LDCS_DSI(n) (2 << (8 + (n) * 2))
>
> I'd add a /* V3U only */ comment at the end.
>
> I can address those two small issues when applying.
Thanks
>
>> #define DIDSR_LDCS_LVDS0(n) (2 << (8 + (n) * 2))
>> #define DIDSR_LDCS_LVDS1(n) (3 << (8 + (n) * 2))
>> #define DIDSR_LDCS_MASK(n) (3 << (8 + (n) * 2))
>