Hi, Xinlei:
On Wed, 2022-09-14 at 21:21 +0800, xinlei.lee@xxxxxxxxxxxx wrote:
> From: Xinlei Lee <xinlei.lee@xxxxxxxxxxxx>
>
> Dpi output needs to adjust the output format to dual edge for MT8186.
> The bridge ic on MT8186 uses the output format of RGB888_dual_edge.
I think different sink ic may support different output format, so query
the sink information to decide which outout format.
> Due
> to hardware changes, we need to modify the output format
> corresponding
> to the mmsys register.
>
> Co-developed-by: Jitao Shi <jitao.shi@xxxxxxxxxxxx>
> Signed-off-by: Jitao Shi <jitao.shi@xxxxxxxxxxxx>
> Signed-off-by: Xinlei Lee <xinlei.lee@xxxxxxxxxxxx>
> Reviewed-by: AngeloGioacchino Del Regno <
> angelogioacchino.delregno@xxxxxxxxxxxxx>
> Reviewed-by: Nís F. R. A. Prado <nfraprado@xxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/mediatek/mtk_dpi.c | 14 ++++++++++++++
> 1 file changed, 14 insertions(+)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c
> b/drivers/gpu/drm/mediatek/mtk_dpi.c
> index fb0b79704636..6e02f02f163c 100644
> --- a/drivers/gpu/drm/mediatek/mtk_dpi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
> @@ -14,6 +14,7 @@
> #include <linux/of_graph.h>
> #include <linux/pinctrl/consumer.h>
> #include <linux/platform_device.h>
> +#include <linux/soc/mediatek/mtk-mmsys.h>
> #include <linux/types.h>
>
> #include <video/videomode.h>
> @@ -28,6 +29,7 @@
> #include "mtk_disp_drv.h"
> #include "mtk_dpi_regs.h"
> #include "mtk_drm_ddp_comp.h"
> +#include "mtk_drm_drv.h"
>
> enum mtk_dpi_out_bit_num {
> MTK_DPI_OUT_BIT_NUM_8BITS,
> @@ -58,6 +60,11 @@ enum mtk_dpi_out_color_format {
> MTK_DPI_COLOR_FORMAT_YCBCR_422
> };
>
> +enum mtk_dpi_out_format_con {
> + MTK_DPI_RGB888_DDR_CON,
> + MTK_DPI_RGB565_SDR_CON
> +};
> +
> struct mtk_dpi {
> struct drm_encoder encoder;
> struct drm_bridge bridge;
> @@ -80,6 +87,7 @@ struct mtk_dpi {
> struct pinctrl_state *pins_dpi;
> u32 output_fmt;
> int refcount;
> + struct device *mmsys_dev;
> };
>
> static inline struct mtk_dpi *bridge_to_dpi(struct drm_bridge *b)
> @@ -133,6 +141,7 @@ struct mtk_dpi_yc_limit {
> * @yuv422_en_bit: Enable bit of yuv422.
> * @csc_enable_bit: Enable bit of CSC.
> * @pixels_per_iter: Quantity of transferred pixels per iteration.
> + * @edge_cfg_in_mmsys: If the edge configuration for DPI's output
> needs to be set in MMSYS.
> */
> struct mtk_dpi_conf {
> unsigned int (*cal_factor)(int clock);
> @@ -151,6 +160,7 @@ struct mtk_dpi_conf {
> u32 yuv422_en_bit;
> u32 csc_enable_bit;
> u32 pixels_per_iter;
> + bool edge_cfg_in_mmsys;
> };
>
> static void mtk_dpi_mask(struct mtk_dpi *dpi, u32 offset, u32 val,
> u32 mask)
> @@ -447,6 +457,8 @@ static void mtk_dpi_dual_edge(struct mtk_dpi
> *dpi)
> mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING,
> dpi->output_fmt ==
> MEDIA_BUS_FMT_RGB888_2X12_LE ?
> EDGE_SEL : 0, EDGE_SEL);
> + if (dpi->conf->edge_cfg_in_mmsys)
> + mtk_mmsys_ddp_dpi_fmt_config(dpi->mmsys_dev,
> MTK_DPI_RGB888_DDR_CON);
Why do you set a DPI driver defined value MTK_DPI_RGB888_DDR_CON into
mmsys driver? I think you should set a value which mmsys driver
understand.
Regards,
CK
> } else {
> mtk_dpi_mask(dpi, DPI_DDR_SETTING, DDR_EN | DDR_4PHASE,
> 0);
> }
> @@ -776,8 +788,10 @@ static int mtk_dpi_bind(struct device *dev,
> struct device *master, void *data)
> {
> struct mtk_dpi *dpi = dev_get_drvdata(dev);
> struct drm_device *drm_dev = data;
> + struct mtk_drm_private *priv = drm_dev->dev_private;
> int ret;
>
> + dpi->mmsys_dev = priv->mmsys_dev;
> ret = drm_simple_encoder_init(drm_dev, &dpi->encoder,
> DRM_MODE_ENCODER_TMDS);
> if (ret) {
