2021-07-19 09:01:13

by Yongqiang Niu

Subject: [PATCH v2] drm/mediatek: add dither 6 setting

in the first version dither patch
https://patchwork.kernel.org/project/linux-mediatek/patch/[email protected]/
dither 6 setting is included in that patch
bit 1 is lfsr_en( "Enables LFSR-type dithering"), need enable
bit 2 is rdither_en(Enables running order dithering), need disable
in this issue
https://partnerissuetracker.corp.google.com/issues/190643544

dither 6 setting missed in set dither common patch
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c?h=next-20210430&id=a6b7c98afdcad0f149010ae028b24f2d0dc24cdb

Signed-off-by: Yongqiang Niu <[email protected]>
---
drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
index 99cbf44..7dd8e05 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
@@ -26,6 +26,7 @@
#define DISP_OD_CFG 0x0020
#define DISP_OD_SIZE 0x0030
#define DISP_DITHER_5 0x0114
+#define DISP_DITHER_6 0x0118
#define DISP_DITHER_7 0x011c
#define DISP_DITHER_15 0x013c
#define DISP_DITHER_16 0x0140
@@ -135,6 +136,7 @@ void mtk_dither_set_common(void __iomem *regs, struct cmdq_client_reg *cmdq_reg,

if (bpc >= MTK_MIN_BPC) {
mtk_ddp_write(cmdq_pkt, 0, cmdq_reg, regs, DISP_DITHER_5);
+ mtk_ddp_write(cmdq_pkt, 0x3002, cmdq_reg, regs, DISP_DITHER_6);
mtk_ddp_write(cmdq_pkt, 0, cmdq_reg, regs, DISP_DITHER_7);
mtk_ddp_write(cmdq_pkt,
DITHER_LSB_ERR_SHIFT_R(MTK_MAX_BPC - bpc) |
--
1.8.1.1.dirty

2021-07-20 05:04:01

by Hsin-Yi Wang

Subject: Re: [PATCH v2] drm/mediatek: add dither 6 setting

On Mon, Jul 19, 2021 at 4:24 PM Yongqiang Niu
<[email protected]> wrote:
>
> in the first version dither patch
> https://patchwork.kernel.org/project/linux-mediatek/patch/[email protected]/
> dither 6 setting is included in that patch
I think you don't need to link the first version here.

> bit 1 is lfsr_en( "Enables LFSR-type dithering"), need enable
> bit 2 is rdither_en(Enables running order dithering), need disable
> in this issue
> https://partnerissuetracker.corp.google.com/issues/190643544
Can you describe the issue in text instead of pasting a link that is
not accessible to everyone?

>
> dither 6 setting missed in set dither common patch
> https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c?h=next-20210430&id=a6b7c98afdcad0f149010ae028b24f2d0dc24cdb

If this is fixing a previous patch, please add Fixes: tag instead of
pasting a link here.


>
> Signed-off-by: Yongqiang Niu <[email protected]>
> ---
> drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> index 99cbf44..7dd8e05 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> @@ -26,6 +26,7 @@
> #define DISP_OD_CFG 0x0020
> #define DISP_OD_SIZE 0x0030
> #define DISP_DITHER_5 0x0114
> +#define DISP_DITHER_6 0x0118
> #define DISP_DITHER_7 0x011c
> #define DISP_DITHER_15 0x013c
> #define DISP_DITHER_16 0x0140
> @@ -135,6 +136,7 @@ void mtk_dither_set_common(void __iomem *regs, struct cmdq_client_reg *cmdq_reg,
>
> if (bpc >= MTK_MIN_BPC) {
> mtk_ddp_write(cmdq_pkt, 0, cmdq_reg, regs, DISP_DITHER_5);
> + mtk_ddp_write(cmdq_pkt, 0x3002, cmdq_reg, regs, DISP_DITHER_6);
> mtk_ddp_write(cmdq_pkt, 0, cmdq_reg, regs, DISP_DITHER_7);
> mtk_ddp_write(cmdq_pkt,
> DITHER_LSB_ERR_SHIFT_R(MTK_MAX_BPC - bpc) |
> --
> 1.8.1.1.dirty
>