Hi, CK:
On Wed, 2018-07-25 at 10:40 +0800, CK Hu wrote:
Hi, Stu:
On Tue, 2018-07-24 at 16:17 +0800, Stu Hsieh wrote:
This patch add memory mode for RDMA
If use RDMA to read data from memory, it should set memory mode to RDMA
Signed-off-by: Stu Hsieh stu.hsieh@mediatek.com
drivers/gpu/drm/mediatek/mtk_disp_rdma.c | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-)
[...]
static inline struct mtk_disp_rdma *comp_to_rdma(struct mtk_ddp_comp *comp) @@ -111,7 +116,8 @@ static void mtk_rdma_start(struct mtk_ddp_comp *comp)
static void mtk_rdma_stop(struct mtk_ddp_comp *comp) {
- rdma_update_bits(comp, DISP_REG_RDMA_GLOBAL_CON, RDMA_ENGINE_EN, 0);
- writel(RDMA_SOFT_RESET, comp->regs + DISP_REG_RDMA_GLOBAL_CON);
- writel(0, comp->regs + DISP_REG_RDMA_GLOBAL_CON);
Without reset, what happen to dram mode? Why direct link mode need not this reset?
There is nothing to happen, I would remove it.
}
static void mtk_rdma_config(struct mtk_ddp_comp *comp, unsigned int width, @@ -121,10 +127,18 @@ static void mtk_rdma_config(struct mtk_ddp_comp *comp, unsigned int width, unsigned int threshold; unsigned int reg; struct mtk_disp_rdma *rdma = comp_to_rdma(comp);
bool *rdma_memory_mode = comp->comp_mode;
rdma_update_bits(comp, DISP_REG_RDMA_SIZE_CON_0, 0xfff, width); rdma_update_bits(comp, DISP_REG_RDMA_SIZE_CON_1, 0xfffff, height);
if (*rdma_memory_mode == true) {
rdma_update_bits(comp, DISP_REG_RDMA_SIZE_CON_0, 0xff0000,MATRIX_INT_MTX_SEL_DEFAULT);rdma_update_bits(comp, DISP_REG_RDMA_GLOBAL_CON,RDMA_MODE_MEMORY, RDMA_MODE_MEMORY);}
I would like this to be a kind of 'layer' config. In some SoC, one layer of OVL could switch to direct link input or dram input. So I think it's better to move this setting into some layer interface.
Regards, CK
If move it to layer_config, RDMA would not trigger interrupt. In the future, when cmdq patch upstream and accepted, this part can move to layer_config.
Regard, Stu
/* * Enable FIFO underflow since DSI and DPI can't be blocked. * Keep the FIFO pseudo size reset default of 8 KiB. Set the