Il 13/06/22 08:48, Bo-Chen Chen ha scritto:
From: Guillaume Ranquet <granquet@xxxxxxxxxxxx>
dpintf is the displayport interface hardware unit. This unit is similar
to dpi and can reuse most of the code.
This patch adds support for mt8195-dpintf to this dpi driver. Main
differences are:
- Some features/functional components are not available for dpintf
which are now excluded from code execution once is_dpintf is set
- dpintf can and needs to choose between different clockdividers based
on the clockspeed. This is done by choosing a different clock parent.
- There are two additional clocks that need to be managed. These are
only set for dpintf and will be set to NULL if not supplied. The
clk_* calls handle these as normal clocks then.
- Some register contents differ slightly between the two components. To
work around this I added register bits/masks with a DPINTF_ prefix
and use them where different.
Based on a separate driver for dpintf created by
Jitao shi <jitao.shi@xxxxxxxxxxxx>.
Signed-off-by: Markus Schneider-Pargmann <msp@xxxxxxxxxxxx>
Signed-off-by: Guillaume Ranquet <granquet@xxxxxxxxxxxx>
[Bo-Chen: Modify reviewers' comments.]
Signed-off-by: Bo-Chen Chen <rex-bc.chen@xxxxxxxxxxxx>
---
drivers/gpu/drm/mediatek/mtk_dpi.c | 115 ++++++++++++++++++--
drivers/gpu/drm/mediatek/mtk_dpi_regs.h | 13 +++
drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 4 +
drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h | 1 +
drivers/gpu/drm/mediatek/mtk_drm_drv.c | 3 +
5 files changed, 126 insertions(+), 10 deletions(-)
diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
index 6b8cf648a5b5..08c8f21b4421 100644
--- a/drivers/gpu/drm/mediatek/mtk_dpi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
@@ -71,6 +71,7 @@ struct mtk_dpi {
void __iomem *regs;
struct device *dev;
struct clk *engine_clk;
+ struct clk *pll_gate_clk;
You don't need this clock in this driver, at all.
`pll_gate` would be CLK_VDO0_DP_INTF0_DP_INTF (parent = CLK_TOP_EDP);
Currently, you're assigning CLK_TOP_EDP to "pixel", but you can, at this point,
simply assign CLK_VDO0_DP_INTF0_DP_INTF to "pixel" instead... as when you call
clk_prepare_enable() on it, that'll also take care of enabling its CLK_TOP_EDP
parent for you.
You're not doing anything special if not taking care of enabling/disabling it.
Regards,
Angelo
