Hi Ulrich,
Thank you for the patch.
On Tuesday, 14 August 2018 16:50:00 EEST Ulrich Hecht wrote:
> From: Koji Matsuoka <koji.matsuoka...@renesas.com>
>
> This patch corrects that the extal clock used with the fixed value
> is acquired from the device tree.
> Also, it is possible to select extal or dotclkin for R8A77995 and
> R8A77990. This patch adds its selection procedure.
>
> Signed-off-by: Koji Matsuoka <koji.matsuoka...@renesas.com>
> ---
> drivers/gpu/drm/rcar-du/rcar_du_crtc.c | 12 ++++++++++++
> drivers/gpu/drm/rcar-du/rcar_du_crtc.h | 2 ++
> drivers/gpu/drm/rcar-du/rcar_lvds_regs.h | 4 +---
DT bindings are missing for this clock.
> 3 files changed, 15 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
> b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c index a903456..4e22d40 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
> @@ -942,10 +942,22 @@ int rcar_du_crtc_create(struct rcar_du_group *rgrp,
> unsigned int swindex, return PTR_ERR(rcrtc->clock);
> }
>
> + sprintf(clk_name, "extal");
> + clk = devm_clk_get(rcdu->dev, clk_name);
Unless I'm mistaken, this clock is specific to the LVDS encoder, it's not used
by the DU. Why is it handled in the DU driver ?
> + if (!IS_ERR(clk)) {
> + rcrtc->extclock = clk;
> + rcrtc->extal_use = true;
> + } else if (PTR_ERR(rcrtc->clock) == -EPROBE_DEFER) {
> + dev_info(rcdu->dev, "can't get extal clock %u\n",
> + hwindex);
> + return -EPROBE_DEFER;
> + }
> +
> sprintf(clk_name, "dclkin.%u", hwindex);
> clk = devm_clk_get(rcdu->dev, clk_name);
> if (!IS_ERR(clk)) {
> rcrtc->extclock = clk;
> + rcrtc->extal_use = false;
> } else if (PTR_ERR(rcrtc->clock) == -EPROBE_DEFER) {
> dev_info(rcdu->dev, "can't get external clock %u\n", hwindex);
> return -EPROBE_DEFER;
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.h
> b/drivers/gpu/drm/rcar-du/rcar_du_crtc.h index 65de551..fa27104 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.h
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.h
> @@ -45,6 +45,7 @@ struct rcar_du_vsp;
> * @vsp: VSP feeding video to this CRTC
> * @vsp_pipe: index of the VSP pipeline feeding video to this CRTC
> * @lvds_ch: index of LVDS
> + * @extal_use: extal clock use
> */
> struct rcar_du_crtc {
> struct drm_crtc crtc;
> @@ -69,6 +70,7 @@ struct rcar_du_crtc {
> struct rcar_du_vsp *vsp;
> unsigned int vsp_pipe;
> int lvds_ch;
> + bool extal_use;
This field is used in patch 04/10... It would be nice to make sure that each
commit compiles when submitting a patch series.
> };
>
> #define to_rcar_crtc(c) container_of(c, struct rcar_du_crtc, crtc)
> diff --git a/drivers/gpu/drm/rcar-du/rcar_lvds_regs.h
> b/drivers/gpu/drm/rcar-du/rcar_lvds_regs.h index e37db95..4899062 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_lvds_regs.h
> +++ b/drivers/gpu/drm/rcar-du/rcar_lvds_regs.h
> @@ -46,15 +46,13 @@
> #define LVDPLLCR_PLLDIVCNT_148M (0x046c1 << 0)
> #define LVDPLLCR_PLLDIVCNT_MASK (0x7ffff << 0)
>
> -/* R-Car D3 */
> #define LVDPLLCR_PLLON (1 << 22)
> #define LVDPLLCR_PLLSEL_PLL0 (0 << 20)
> #define LVDPLLCR_PLLSEL_LVX (1 << 20)
> #define LVDPLLCR_PLLSEL_PLL1 (2 << 20)
> #define LVDPLLCR_CKSEL_LVX (1 << 17)
> #define LVDPLLCR_CKSEL_EXTAL (3 << 17)
> -#define LVDPLLCR_CKSEL_DU_DOTCLKIN0 (5 << 17)
> -#define LVDPLLCR_CKSEL_DU_DOTCLKIN1 (7 << 17)
> +#define LVDPLLCR_CKSEL_DU_DOTCLKIN(n) ((5 + (n) * 2) << 17)
This seems to belong to patch 04/10.
> #define LVDPLLCR_OCKSEL_7 (0 << 16)
> #define LVDPLLCR_OCKSEL_NOT_DIVIDED (1 << 16)
> #define LVDPLLCR_STP_CLKOUTE1_DIS (0 << 14)
--
Regards,
Laurent Pinchart
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