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0305-drm-vc4-Add-DT-parameters-to-control-CMA-usage.patch

0305-drm-vc4-Add-DT-parameters-to-control-CMA-usage.patch 2.0 KB
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  1. From 937dd48dd631d45dbee39853dcb1cd98220bb1e5 Mon Sep 17 00:00:00 2001
    2. 

  2. From: Phil Elwell <phil@raspberrypi.org>
    3. 

  3. Date: Sun, 24 Apr 2016 17:28:15 +0100
    4. 

  4. Subject: [PATCH 305/381] drm/vc4: Add DT parameters to control CMA usage
    5. 

  5. 

  6. Example: dtoverlay=vc4-kms-v3d,cma-128
    7. 

  7. 

  8. See: https://github.com/raspberrypi/linux/pull/1431
    9. 

  9. 

  10. Signed-off-by: Phil Elwell <phil@raspberrypi.org>
    11. 

  11. ---
    12. 

  12.  arch/arm/boot/dts/overlays/README                  |  8 +++--
    13. 

  13.  arch/arm/boot/dts/overlays/vc4-kms-v3d-overlay.dts | 36 ++++++++++++++++++++++
    14. 

  14.  2 files changed, 42 insertions(+), 2 deletions(-)
    15. 

  15. 

  16. --- a/arch/arm/boot/dts/overlays/README
    17. 

  17. +++ b/arch/arm/boot/dts/overlays/README
    18. 

  18. @@ -1023,8 +1023,12 @@ Name:   vc4-kms-v3d
    19. 

  19.  Info:   Enable Eric Anholt's DRM VC4 HDMI/HVS/V3D driver. Running startx or
    20. 

  20.          booting to GUI while this overlay is in use will cause interesting
    21. 

  21.          lockups.
    22. 

  22. -Load:   dtoverlay=vc4-kms-v3d
    23. 

  23. -Params: <None>
    24. 

  24. +Load:   dtoverlay=vc4-kms-v3d,<param>
    25. 

  25. +Params: cma-256                 CMA is 256MB, 256MB-aligned (needs 1GB)
    26. 

  26. +        cma-192                 CMA is 192MB, 256MB-aligned (needs 1GB)
    27. 

  27. +        cma-128                 CMA is 128MB, 128MB-aligned
    28. 

  28. +        cma-96                  CMA is 96MB, 128MB-aligned
    29. 

  29. +        cma-64                  CMA is 64MB, 64MB-aligned
    30. 

  30.  
    31. 

  31.  
    32. 

  32.  Name:   vga666
    33. 

  33. --- a/arch/arm/boot/dts/overlays/vc4-kms-v3d-overlay.dts
    34. 

  34. +++ b/arch/arm/boot/dts/overlays/vc4-kms-v3d-overlay.dts
    35. 

  35. @@ -94,4 +94,40 @@
    36. 

  36.  			bootargs = "cma=256M@256M";
    37. 

  37.  		};
    38. 

  38.  	};
    39. 

  39. +
    40. 

  40. +	fragment@5 {
    41. 

  41. +		target-path = "/chosen";
    42. 

  42. +		__dormant__ {
    43. 

  43. +			bootargs = "cma=192M@256M";
    44. 

  44. +		};
    45. 

  45. +	};
    46. 

  46. +
    47. 

  47. +	fragment@6 {
    48. 

  48. +		target-path = "/chosen";
    49. 

  49. +		__dormant__ {
    50. 

  50. +			bootargs = "cma=128M@128M";
    51. 

  51. +		};
    52. 

  52. +	};
    53. 

  53. +
    54. 

  54. +	fragment@7 {
    55. 

  55. +		target-path = "/chosen";
    56. 

  56. +		__dormant__ {
    57. 

  57. +			bootargs = "cma=96M@128M";
    58. 

  58. +		};
    59. 

  59. +	};
    60. 

  60. +
    61. 

  61. +	fragment@8 {
    62. 

  62. +		target-path = "/chosen";
    63. 

  63. +		__dormant__ {
    64. 

  64. +			bootargs = "cma=64M@64M";
    65. 

  65. +		};
    66. 

  66. +	};
    67. 

  67. +
    68. 

  68. +	__overrides__ {
    69. 

  69. +		cma-256 = <0>,"+4-5-6-7-8";
    70. 

  70. +		cma-192 = <0>,"-4+5-6-7-8";
    71. 

  71. +		cma-128 = <0>,"-4-5+6-7-8";
    72. 

  72. +		cma-96  = <0>,"-4-5-6+7-8";
    73. 

  73. +		cma-64  = <0>,"-4-5-6-7+8";
    74. 

  74. +	};
    75. 

  75.  };
    76.