From: vkorjani
After enabling DSC we need to send compression mode command packet
and pps data packet, for which 2 new data types are added
07h Compression Mode Data Type Write , short write, 2 parameters
0Ah PPS Long Write (word count determines number of bytes)
This patch adds support to send
From: vkorjani
This patch adds code to initialize Picture Parameter set (PPS)
data structure for DSC.
DSC is enabled than the bitrate should be calculated using the
formula pixel_clock * bits_per_pixel / lane_count, where
bits_per_pixel can be 8bpp, 10bpp, 12bpp.
value of bits_per_pixel is avail
From: vkorjani
Program the PPS data from intel_dsc->vesa_dsc_pps_data
into display controller register DSCx_PICTURE_PARAMETER_SET_x.
DSC should be enabled in MIPI Port control register, after
programming PPS register
Disable DSC in disable sequence after disabling port.
Signed-off-by: vkorjani
From: vkorjani
This patch adds code to send pps long packet and compression mode
command packet.
Signed-off-by: vkorjani
---
drivers/gpu/drm/i915/intel_dsi_panel_vbt.c | 12
1 file changed, 12 insertions(+)
diff --git a/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
b/drivers/gpu/
From: vkorjani
Program the MIPI_DPI_RESOLUTION register horizontal
resolution using the byte_to_pixels() DSC specific
function in case of compression enabled.
For non-compressed video, the number of pixels
in active region are computed as usual.
Change-Id: Iacea79352fa67a40a1d305494539f7c99f2715
From: vkorjani
Adding pps structure as per VESA DSC v1.1 spec.
Adding "vbt_dsc_param" vbt structure to store DSC info
vbt_dsc_param and pps structures are made part of intel_vbt_data.
Signed-off-by: vkorjani
Signed-off-by: Yogesh Mohan Marimuthu
---
drivers/gpu/drm/i915/i915_drv.h |2 +
From: vkorjani
This patch adds register definitions required to support
DSC feature.
Signed-off-by: vkorjani
Signed-off-by: Yogesh Mohan Marimuthu
---
drivers/gpu/drm/i915/i915_reg.h | 126 +
drivers/gpu/drm/i915/intel_bios.h |1 +
2 files changed, 1
From: vkorjani
For compression enabled, the number of bytes in active
region cannot be calculated just by multiplying number
of pixels and bits per pixel, formula in HLD is
ceil((ceil(pixels/num_slice) * bpp) / 8) * num_slice
hence modifying txbyteclkhs() to accommodate calculation
for DSC Enab
From: vkorjani
s RFC is for feature Display Stream Compression (DSC) for BXT,
It is a VESA defined standard to compress and decompress image in display
streams in a link independent manner. Some of the basic requirements of
the standard are to support higher resolution on a given display link
wit
