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tools/litex_json2dts/framebuffer: Switch to new simplified Video Framebuffer. 

Timings are already pre-initialized, so software will only have to configure/modify
them to change the video resolution.
This commit is contained in:
Florent Kermarrec 2021-03-26 16:25:06 +01:00
parent 137274dfe0
commit 6b482bce54
1 changed files with 4 additions and 35 deletions
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39
litex/tools/litex_json2dts.py
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@ -370,11 +370,10 @@ def generate_dts(d, initrd_start=None, initrd_size=None, polling=False):
# Framebuffer ----------------------------------------------------------------------------------
if "framebuffer" in d["csr_bases"]:
# FIXME: Use dynamic framebuffer base and size
framebuffer_base = 0xc8000000
framebuffer_width = d["constants"]["litevideo_h_active"]
framebuffer_height = d["constants"]["litevideo_v_active"]
if "video_framebuffer" in d["csr_bases"]:
framebuffer_base = d["constants"]["video_framebuffer_base"]
framebuffer_width = d["constants"]["video_framebuffer_hres"]
framebuffer_height = d["constants"]["video_framebuffer_vres"]
dts += """
framebuffer0: framebuffer@f0000000 {{
compatible = "simple-framebuffer";
@ -391,36 +390,6 @@ def generate_dts(d, initrd_start=None, initrd_size=None, polling=False):
framebuffer_size = framebuffer_width * framebuffer_height * 4,
framebuffer_stride = framebuffer_width * 4)
dts += """
litevideo0: gpu@{litevideo_base:x} {{
compatible = "litex,litevideo";
reg = <0x{litevideo_base:x} 0x100>;
litevideo,pixel-clock = <{litevideo_pixel_clock}>;
litevideo,h-active = <{litevideo_h_active}>;
litevideo,h-blanking = <{litevideo_h_blanking}>;
litevideo,h-sync = <{litevideo_h_sync}>;
litevideo,h-front-porch = <{litevideo_h_front_porch}>;
litevideo,v-active = <{litevideo_v_active}>;
litevideo,v-blanking = <{litevideo_v_blanking}>;
litevideo,v-sync = <{litevideo_v_sync}>;
litevideo,v-front-porch = <{litevideo_v_front_porch}>;
litevideo,dma-offset = <0x{litevideo_dma_offset:x}>;
litevideo,dma-length = <0x{litevideo_dma_length:x}>;
}};
""".format(
litevideo_base = d["csr_bases"]["framebuffer"],
litevideo_pixel_clock = int(d["constants"]["litevideo_pix_clk"] / 1e3),
litevideo_h_active = d["constants"]["litevideo_h_active"],
litevideo_h_blanking = d["constants"]["litevideo_h_blanking"],
litevideo_h_sync = d["constants"]["litevideo_h_sync"],
litevideo_h_front_porch = d["constants"]["litevideo_h_front_porch"],
litevideo_v_active = d["constants"]["litevideo_v_active"],
litevideo_v_blanking = d["constants"]["litevideo_v_blanking"],
litevideo_v_sync = d["constants"]["litevideo_v_sync"],
litevideo_v_front_porch = d["constants"]["litevideo_v_front_porch"],
litevideo_dma_offset = framebuffer_base - d["memories"]["main_ram"]["base"],
litevideo_dma_length = framebuffer_width * framebuffer_height * 4)
# ICAP Bitstream -------------------------------------------------------------------------------
if "icap_bit" in d["csr_bases"]: