Re: [PATCH v3 3/4] drm/msm/mdp5: Add START signal to kick off certain pipelines

From: Archit Taneja
Date: Tue Mar 24 2015 - 00:48:13 EST




On 03/24/2015 03:40 AM, "Stéphane Viau" wrote:
Hi Archit,

Hi Stephane,

On 03/14/2015 01:19 AM, Stephane Viau wrote:
Some interfaces (WB, DSI Command Mode) need to be kicked off
through a START Signal. This signal needs to be sent at the right
time and requests in some cases to keep track of the pipeline
status (eg: whether pipeline registers are flushed AND output WB
buffers are ready, in case of WB interface).

Signed-off-by: Stephane Viau <sviau@xxxxxxxxxxxxxx>
---
drivers/gpu/drm/msm/mdp/mdp5/mdp5_cfg.c | 2 +
drivers/gpu/drm/msm/mdp/mdp5/mdp5_cfg.h | 7 +-
drivers/gpu/drm/msm/mdp/mdp5/mdp5_crtc.c | 31 ++--
drivers/gpu/drm/msm/mdp/mdp5/mdp5_ctl.c | 247
++++++++++++++++++++++++----
drivers/gpu/drm/msm/mdp/mdp5/mdp5_ctl.h | 72 +++-----
drivers/gpu/drm/msm/mdp/mdp5/mdp5_encoder.c | 13 +-
drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.h | 1 +
7 files changed, 276 insertions(+), 97 deletions(-)

diff --git a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_cfg.c
b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_cfg.c
index c078f30..72c075a 100644
--- a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_cfg.c
+++ b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_cfg.c
@@ -31,6 +31,7 @@ const struct mdp5_cfg_hw msm8x74_config = {
.ctl = {
.count = 5,
.base = { 0x00600, 0x00700, 0x00800, 0x00900, 0x00a00 },
+ .flush_hw_mask = 0x0003ffff,
},
.pipe_vig = {
.count = 3,
@@ -78,6 +79,7 @@ const struct mdp5_cfg_hw apq8084_config = {
.ctl = {
.count = 5,
.base = { 0x00600, 0x00700, 0x00800, 0x00900, 0x00a00 },
+ .flush_hw_mask = 0x003fffff,

msm8x16 would require a flush_hw_mask too, it should be 0x32a59 if I'm
not wrong. Could you please add it for the next revision, or as a part
of the 8x16 hw cfg patch?

Correct; thanks for pointing this out.

IMO, this value should be 0x4003ffff because the fields are actually
present in the register (even though the interfaces/pipes.etc. are not).
Anyway, these bits won't be accessed because the driver won't even allow
the usage of the corresponding resources.


Okay, that makes sense.


I will update in the v2 of "drm/msm/mdp5: Add hardware configuration for
msm8x16".

Thanks,
Stephane.


Thanks!
Archit

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