Regards
Shashank
On 2/2/2017 3:21 PM, Ville Syrjälä wrote:
On Thu, Feb 02, 2017 at 11:18:51AM +0530, Sharma, Shashank wrote:
Regards
Shashank
On 2/1/2017 10:02 PM, Ville Syrjälä wrote:
On Wed, Feb 01, 2017 at 06:14:39PM +0530, Shashank Sharma wrote:
HDMI 2.0 spec mandates scrambling for modes with pixel clock higher
than 340Mhz. This patch adds few new functions in drm layer for
core drivers to enable/disable scrambling.
This patch adds:
- A function to detect scrambling support parsing HF-VSDB
- A function to check scrambling status runtime using SCDC read.
- Two functions to enable/disable scrambling using SCDC read/write.
- Few new bools to reflect scrambling support and status.
Signed-off-by: Shashank Sharma <shashank.sharma@xxxxxxxxx>
---
drivers/gpu/drm/drm_edid.c | 131 +++++++++++++++++++++++++++++++++++++++++++-
include/drm/drm_connector.h | 24 ++++++++
include/drm/drm_edid.h | 6 +-
3 files changed, 159 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 37902e5..f0d940a 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -37,6 +37,7 @@
#include <drm/drm_edid.h>
#include <drm/drm_encoder.h>
#include <drm/drm_displayid.h>
+#include <drm/drm_scdc_helper.h>
#define version_greater(edid, maj, min) \
(((edid)->version > (maj)) || \
@@ -3814,6 +3815,132 @@ static void drm_detect_hdmi_scdc(struct drm_connector *connector,
}
}
+static void drm_detect_hdmi_scrambling(struct drm_connector *connector,
+ const u8 *hf_vsdb)
That names seems off. Should probably be drm_parse_hdmi_forum_vsdb() or
something.
Actually, unlike the last patch set, we are not parsing the whole
hf_vsdb, but parsing it only for
scrambling status byte (hf_vsdb[5]). But may be I can make it
drm_detect_scrambling_from_hfvsdb
ot something similar. We will have more hf_vsdb parsing for 3d flags,
yuv420_deep_color etc.
Well, so far I'm not seeing much point in splitting it up. So I'd stuff
it all into one place, for now at least.
I had published a patch just doing as you suggested which was parsing
complete hf-vsdb in one shot, and adding info in
hdmi_info structure, to accommodate it.
(Patch https://patchwork.freedesktop.org/patch/128963/ and
https://patchwork.freedesktop.org/patch/128962/)
But you gave a review comment not to add anything which is not being
used in the patch series:
https://patchwork.freedesktop.org/patch/128962/
That was the only reason I have split hf-vsdb parsing patch into 3 parts
- parse SCDC and scrambling info (here)
- with YUV420 deep color ( upcoming )
- with 3d handling (upcoming)
So I am confused, split or no split :-) ?
- Shashank
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