Hi Sergei,
Thank you for the patch.
On Thursday, 11 January 2018 18:54:35 EET Sergei Shtylyov wrote:
> Add support for the R-Car V3M (R8A77970) SoC to the DU driver (this SoC
> has only 1 display port). Note that there are some differences with the
> other R-Car gen3 SoCs in the LVDS encoder part, e.g. LVDPLLCR has the same
> layout as on the R-Car gen2 SoCs...
>
> Signed-off-by: Sergei Shtylyov <sergei.shtyl...@cogentembedded.com>
Could you please rebase this series on top of the LVDS rework posted as
"[PATCH 00/10] R-Car DU: Convert LVDS code to bridge driver" (https://
www.spinics.net/lists/dri-devel/msg161931.html) ? It should make it easier to
implement support for V3M. Please then split the DU and LVDS drivers changes
in two patches.
> ---
> Documentation/devicetree/bindings/display/renesas,du.txt | 1
Please split the DT bindings changes to a separate patch.
> drivers/gpu/drm/rcar-du/rcar_du_drv.c | 23 +++++++++++
> drivers/gpu/drm/rcar-du/rcar_du_drv.h | 1
> drivers/gpu/drm/rcar-du/rcar_du_group.c | 10 +++---
> drivers/gpu/drm/rcar-du/rcar_du_lvdsenc.c | 20 +++++++----
> 5 files changed, 45 insertions(+), 10 deletions(-)
>
> Index: linux/Documentation/devicetree/bindings/display/renesas,du.txt
> ===================================================================
> --- linux.orig/Documentation/devicetree/bindings/display/renesas,du.txt
> +++ linux/Documentation/devicetree/bindings/display/renesas,du.txt
> @@ -13,6 +13,7 @@ Required Properties:
> - "renesas,du-r8a7794" for R8A7794 (R-Car E2) compatible DU
> - "renesas,du-r8a7795" for R8A7795 (R-Car H3) compatible DU
> - "renesas,du-r8a7796" for R8A7796 (R-Car M3-W) compatible DU
> + - "renesas,du-r8a77970" for R8A77970 (R-Car V3M) compatible DU
>
> - reg: A list of base address and length of each memory resource, one for
> each entry in the reg-names property.
You also need to update the ports table further down in this file.
> Index: linux/drivers/gpu/drm/rcar-du/rcar_du_drv.c
> ===================================================================
> --- linux.orig/drivers/gpu/drm/rcar-du/rcar_du_drv.c
> +++ linux/drivers/gpu/drm/rcar-du/rcar_du_drv.c
> @@ -258,6 +258,28 @@ static const struct rcar_du_device_info
> .dpll_ch = BIT(1),
> };
>
> +static const struct rcar_du_device_info rcar_du_r8a77970_info = {
> + .gen = 3,
> + .model = R8A77970,
> + .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
> + | RCAR_DU_FEATURE_EXT_CTRL_REGS
> + | RCAR_DU_FEATURE_VSP1_SOURCE,
> + .num_crtcs = 1,
> + .routes = {
> + /* R8A77970 has one RGB output and one LVDS output. */
> + [RCAR_DU_OUTPUT_DPAD0] = {
> + .possible_crtcs = BIT(0),
> + .port = 1,
> + },
> + [RCAR_DU_OUTPUT_LVDS0] = {
> + .possible_crtcs = BIT(0),
> + .port = 0,
> + },
All the other SoCs have DPAD0 as port 0. Unless there's a specific need for a
different implementation with V3M I'd keep the same order.
> + },
> + .num_lvds = 1,
> + .dpll_ch = BIT(1),
This doesn't seem to be correct, there's no DPLL in V3M.
> +};
> +
> static const struct of_device_id rcar_du_of_table[] = {
> { .compatible = "renesas,du-r8a7743", .data = &rzg1_du_r8a7743_info },
> { .compatible = "renesas,du-r8a7745", .data = &rzg1_du_r8a7745_info },
> @@ -269,6 +291,7 @@ static const struct of_device_id rcar_du
> { .compatible = "renesas,du-r8a7794", .data = &rcar_du_r8a7794_info },
> { .compatible = "renesas,du-r8a7795", .data = &rcar_du_r8a7795_info },
> { .compatible = "renesas,du-r8a7796", .data = &rcar_du_r8a7796_info },
> + { .compatible = "renesas,du-r8a77970", .data = &rcar_du_r8a77970_info },
> { }
> };
> Index: linux/drivers/gpu/drm/rcar-du/rcar_du_drv.h
> ===================================================================
> --- linux.orig/drivers/gpu/drm/rcar-du/rcar_du_drv.h
> +++ linux/drivers/gpu/drm/rcar-du/rcar_du_drv.h
> @@ -59,6 +59,7 @@ enum rcar_du_model {
> R8A7794,
> R8A7795,
> R8A7796,
> + R8A77970,
> };
>
> /*
> Index: linux/drivers/gpu/drm/rcar-du/rcar_du_group.c
> ===================================================================
> --- linux.orig/drivers/gpu/drm/rcar-du/rcar_du_group.c
> +++ linux/drivers/gpu/drm/rcar-du/rcar_du_group.c
> @@ -133,10 +133,12 @@ static void rcar_du_group_setup(struct r
> rcar_du_group_write(rgrp, DORCR, DORCR_PG1D_DS1 | DORCR_DPRS);
>
> /* Apply planes to CRTCs association. */
> - mutex_lock(&rgrp->lock);
> - rcar_du_group_write(rgrp, DPTSR, (rgrp->dptsr_planes << 16) |
> - rgrp->dptsr_planes);
> - mutex_unlock(&rgrp->lock);
> + if (rcdu->info->num_crtcs > 1) {
> + mutex_lock(&rgrp->lock);
> + rcar_du_group_write(rgrp, DPTSR, (rgrp->dptsr_planes << 16) |
> + rgrp->dptsr_planes);
> + mutex_unlock(&rgrp->lock);
> + }
Shouldn't you skip writing to the DPTSR register if there's a single DPTSR in
the group ? That would then apply to M3-W as well, which doesn't have the
DPTSR2 register. I'd split this change to a separate patch.
> }
>
> /*
> Index: linux/drivers/gpu/drm/rcar-du/rcar_du_lvdsenc.c
> ===================================================================
> --- linux.orig/drivers/gpu/drm/rcar-du/rcar_du_lvdsenc.c
> +++ linux/drivers/gpu/drm/rcar-du/rcar_du_lvdsenc.c
> @@ -71,8 +71,10 @@ static int rcar_du_lvdsenc_start(struct
> struct rcar_du_crtc *rcrtc)
> {
> u32 lvdhcr, lvdpllcr, lvdcr0 = lvds->mode << LVDCR0_LVMD_SHIFT;
> + const struct rcar_du_device_info *info = lvds->dev->info;
> const struct drm_display_mode *mode = &rcrtc->crtc.mode;
> - unsigned int gen = lvds->dev->info->gen;
> + unsigned int gen = info->gen;
> + enum rcar_du_model model = info->model;
> unsigned int freq = mode->clock;
> int ret;
>
> @@ -104,7 +106,7 @@ static int rcar_du_lvdsenc_start(struct
> rcar_lvds_write(lvds, LVDCHCR, lvdhcr);
>
> /* PLL clock configuration */
> - if (gen < 3)
> + if (gen < 3 || model == R8A77970)
> lvdpllcr = rcar_lvds_gen2_lvdpllcr(freq);
> else
> lvdpllcr = rcar_lvds_gen3_lvdpllcr(freq);
> @@ -136,6 +138,12 @@ static int rcar_du_lvdsenc_start(struct
> rcar_lvds_write(lvds, LVDCR0, lvdcr0);
> }
>
> + /* Turn on the LVDS PHY on R-Car V3M. */
> + if (model == R8A77970) {
> + lvdcr0 |= LVDCR0_LVEN;
> + rcar_lvds_write(lvds, LVDCR0, lvdcr0);
> + }
> +
> /* Wait for the startup delay. */
> usleep_range(100, 150);
>
> @@ -177,14 +185,14 @@ int rcar_du_lvdsenc_enable(struct rcar_d
> void rcar_du_lvdsenc_atomic_check(struct rcar_du_lvdsenc *lvds,
> struct drm_display_mode *mode)
> {
> - struct rcar_du_device *rcdu = lvds->dev;
> + const struct rcar_du_device_info *info = lvds->dev->info;
>
> /*
> * The internal LVDS encoder has a restricted clock frequency operating
> - * range (30MHz to 150MHz on Gen2, 25.175MHz to 148.5MHz on Gen3). Clamp
> - * the clock accordingly.
> + * range (30MHz to 150MHz on Gen2 and R-Car V3M, 25.175MHz to 148.5MHz
> + * on Gen3). Clamp the clock accordingly.
> */
> - if (rcdu->info->gen < 3)
> + if (info->gen < 3 || info->model == R8A77970)
> mode->clock = clamp(mode->clock, 30000, 150000);
According to the datasheet the frequency range for V3M is the same as for the
H3 and M3 SoCs. The range seems to have changed starting in datasheet version
0.52. I would fix the range in a separate patch first.
If you want I can send patches to fix this issue and the previous one, or you
can write them and include them in v2. Let me know what you'd prefer.
> else
> mode->clock = clamp(mode->clock, 25175, 148500);
--
Regards,
Laurent Pinchart
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