Hi Sergei,
Thank you for the patch.
On Thursday, 18 January 2018 16:05:51 EET Sergei Shtylyov wrote:
> Commit d455b45f8393 ("v4l: vsp1: Add support for new VSP2-BS, VSP2-DL,
> and VSP2-D instances") added support for the VSP2-D found in the R-Car
> V3M (R8A77970) but the video output that VSP2-D sends to DU has a greenish
> garbage-like line repeated every 8 screen rows. It turns out that R-Car
> V3M has the LIF0 buffer attribute register that you need to set to a non-
> default value in order to get rid of the output artifacts...
>
> Based on the original (and large) patch by Daisuke Matsushita
> <daisuke.matsushita...@hitachi.com>.
>
> Fixes: d455b45f8393 ("v4l: vsp1: Add support for new VSP2-BS, VSP2-DL and
> VSP2-D instances") Signed-off-by: Sergei Shtylyov
> <sergei.shtyl...@cogentembedded.com>
>
> ---
> This patch is against the 'media_tree.git' repo's 'fixes' branch.
>
> Changes in version 3:
> - reworded the comment in lif_configure();
> - reworded the patch description.
>
> Changes in version 2:
> - added a comment before the V3M SoC check;
> - fixed indetation in that check;
> - reformatted the patch description.
>
> drivers/media/platform/vsp1/vsp1_lif.c | 15 +++++++++++++++
> drivers/media/platform/vsp1/vsp1_regs.h | 5 +++++
> 2 files changed, 20 insertions(+)
>
> Index: media_tree/drivers/media/platform/vsp1/vsp1_lif.c
> ===================================================================
> --- media_tree.orig/drivers/media/platform/vsp1/vsp1_lif.c
> +++ media_tree/drivers/media/platform/vsp1/vsp1_lif.c
> @@ -155,6 +155,21 @@ static void lif_configure(struct vsp1_en
> (obth << VI6_LIF_CTRL_OBTH_SHIFT) |
> (format->code == 0 ? VI6_LIF_CTRL_CFMT : 0) |
> VI6_LIF_CTRL_REQSEL | VI6_LIF_CTRL_LIF_EN);
> +
> + /*
> + * On R-Car V3M the LIF0 buffer attribute register has to be set
> + * to a non-default value to guarantee proper operation (otherwise
> + * artifacts may appear on the output). The value required by
> + * the manual is not explained but is likely a buffer size or
> + * threshold...
One period is enough :-)
> + */
> + if ((entity->vsp1->version &
> + (VI6_IP_VERSION_MODEL_MASK | VI6_IP_VERSION_SOC_MASK)) ==
> + (VI6_IP_VERSION_MODEL_VSPD_V3 | VI6_IP_VERSION_SOC_V3M)) {
> + vsp1_lif_write(lif, dl, VI6_LIF_LBA,
> + VI6_LIF_LBA_LBA0 |
> + (1536 << VI6_LIF_LBA_LBA1_SHIFT));
> + }
There's no need for braces or inner parentheses. To make this easier to read I
propose defining a new macro VI6_IP_VERSION_MASK that combines both the model
and SoC. Otherwise this looks good to me,
Reviewed-by: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
I'll post a v4 with that change in reply to this e-mail, please let me know if
you're fine with it.
> }
>
> static const struct vsp1_entity_operations lif_entity_ops = {
> Index: media_tree/drivers/media/platform/vsp1/vsp1_regs.h
> ===================================================================
> --- media_tree.orig/drivers/media/platform/vsp1/vsp1_regs.h
> +++ media_tree/drivers/media/platform/vsp1/vsp1_regs.h
> @@ -693,6 +693,11 @@
> #define VI6_LIF_CSBTH_LBTH_MASK (0x7ff << 0)
> #define VI6_LIF_CSBTH_LBTH_SHIFT 0
>
> +#define VI6_LIF_LBA 0x3b0c
> +#define VI6_LIF_LBA_LBA0 (1 << 31)
> +#define VI6_LIF_LBA_LBA1_MASK (0xfff << 16)
> +#define VI6_LIF_LBA_LBA1_SHIFT 16
> +
> /* ------------------------------------------------------------------------
> * Security Control Registers
> */
--
Regards,
Laurent Pinchart
