1021 lines
29 KiB
C
1021 lines
29 KiB
C
/*
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* Copyright (C) STMicroelectronics SA 2017
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*
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* Authors: Philippe Cornu <philippe.cornu@st.com>
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* Yannick Fertre <yannick.fertre@st.com>
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* Fabien Dessenne <fabien.dessenne@st.com>
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* Mickael Reulier <mickael.reulier@st.com>
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*
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* License terms: GNU General Public License (GPL), version 2
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*/
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#include <linux/clk.h>
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#include <linux/component.h>
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#include <linux/of_address.h>
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#include <linux/of_graph.h>
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#include <linux/reset.h>
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#include <drm/drm_atomic.h>
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_crtc_helper.h>
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#include <drm/drm_fb_cma_helper.h>
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#include <drm/drm_gem_cma_helper.h>
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#include <drm/drm_of.h>
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#include <drm/drm_bridge.h>
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#include <drm/drm_plane_helper.h>
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#include <video/videomode.h>
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#include "ltdc.h"
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#define NB_CRTC 1
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#define CRTC_MASK GENMASK(NB_CRTC - 1, 0)
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#define MAX_IRQ 4
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#define MAX_ENDPOINTS 2
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#define HWVER_10200 0x010200
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#define HWVER_10300 0x010300
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#define HWVER_20101 0x020101
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/*
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* The address of some registers depends on the HW version: such registers have
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* an extra offset specified with reg_ofs.
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*/
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#define REG_OFS_NONE 0
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#define REG_OFS_4 4 /* Insertion of "Layer Conf. 2" reg */
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#define REG_OFS (ldev->caps.reg_ofs)
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#define LAY_OFS 0x80 /* Register Offset between 2 layers */
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/* Global register offsets */
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#define LTDC_IDR 0x0000 /* IDentification */
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#define LTDC_LCR 0x0004 /* Layer Count */
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#define LTDC_SSCR 0x0008 /* Synchronization Size Configuration */
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#define LTDC_BPCR 0x000C /* Back Porch Configuration */
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#define LTDC_AWCR 0x0010 /* Active Width Configuration */
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#define LTDC_TWCR 0x0014 /* Total Width Configuration */
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#define LTDC_GCR 0x0018 /* Global Control */
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#define LTDC_GC1R 0x001C /* Global Configuration 1 */
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#define LTDC_GC2R 0x0020 /* Global Configuration 2 */
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#define LTDC_SRCR 0x0024 /* Shadow Reload Configuration */
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#define LTDC_GACR 0x0028 /* GAmma Correction */
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#define LTDC_BCCR 0x002C /* Background Color Configuration */
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#define LTDC_IER 0x0034 /* Interrupt Enable */
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#define LTDC_ISR 0x0038 /* Interrupt Status */
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#define LTDC_ICR 0x003C /* Interrupt Clear */
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#define LTDC_LIPCR 0x0040 /* Line Interrupt Position Conf. */
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#define LTDC_CPSR 0x0044 /* Current Position Status */
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#define LTDC_CDSR 0x0048 /* Current Display Status */
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/* Layer register offsets */
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#define LTDC_L1LC1R (0x80) /* L1 Layer Configuration 1 */
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#define LTDC_L1LC2R (0x84) /* L1 Layer Configuration 2 */
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#define LTDC_L1CR (0x84 + REG_OFS)/* L1 Control */
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#define LTDC_L1WHPCR (0x88 + REG_OFS)/* L1 Window Hor Position Config */
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#define LTDC_L1WVPCR (0x8C + REG_OFS)/* L1 Window Vert Position Config */
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#define LTDC_L1CKCR (0x90 + REG_OFS)/* L1 Color Keying Configuration */
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#define LTDC_L1PFCR (0x94 + REG_OFS)/* L1 Pixel Format Configuration */
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#define LTDC_L1CACR (0x98 + REG_OFS)/* L1 Constant Alpha Config */
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#define LTDC_L1DCCR (0x9C + REG_OFS)/* L1 Default Color Configuration */
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#define LTDC_L1BFCR (0xA0 + REG_OFS)/* L1 Blend Factors Configuration */
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#define LTDC_L1FBBCR (0xA4 + REG_OFS)/* L1 FrameBuffer Bus Control */
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#define LTDC_L1AFBCR (0xA8 + REG_OFS)/* L1 AuxFB Control */
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#define LTDC_L1CFBAR (0xAC + REG_OFS)/* L1 Color FrameBuffer Address */
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#define LTDC_L1CFBLR (0xB0 + REG_OFS)/* L1 Color FrameBuffer Length */
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#define LTDC_L1CFBLNR (0xB4 + REG_OFS)/* L1 Color FrameBuffer Line Nb */
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#define LTDC_L1AFBAR (0xB8 + REG_OFS)/* L1 AuxFB Address */
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#define LTDC_L1AFBLR (0xBC + REG_OFS)/* L1 AuxFB Length */
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#define LTDC_L1AFBLNR (0xC0 + REG_OFS)/* L1 AuxFB Line Number */
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#define LTDC_L1CLUTWR (0xC4 + REG_OFS)/* L1 CLUT Write */
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#define LTDC_L1YS1R (0xE0 + REG_OFS)/* L1 YCbCr Scale 1 */
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#define LTDC_L1YS2R (0xE4 + REG_OFS)/* L1 YCbCr Scale 2 */
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/* Bit definitions */
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#define SSCR_VSH GENMASK(10, 0) /* Vertical Synchronization Height */
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#define SSCR_HSW GENMASK(27, 16) /* Horizontal Synchronization Width */
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#define BPCR_AVBP GENMASK(10, 0) /* Accumulated Vertical Back Porch */
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#define BPCR_AHBP GENMASK(27, 16) /* Accumulated Horizontal Back Porch */
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#define AWCR_AAH GENMASK(10, 0) /* Accumulated Active Height */
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#define AWCR_AAW GENMASK(27, 16) /* Accumulated Active Width */
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#define TWCR_TOTALH GENMASK(10, 0) /* TOTAL Height */
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#define TWCR_TOTALW GENMASK(27, 16) /* TOTAL Width */
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#define GCR_LTDCEN BIT(0) /* LTDC ENable */
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#define GCR_DEN BIT(16) /* Dither ENable */
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#define GCR_PCPOL BIT(28) /* Pixel Clock POLarity-Inverted */
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#define GCR_DEPOL BIT(29) /* Data Enable POLarity-High */
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#define GCR_VSPOL BIT(30) /* Vertical Synchro POLarity-High */
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#define GCR_HSPOL BIT(31) /* Horizontal Synchro POLarity-High */
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#define GC1R_WBCH GENMASK(3, 0) /* Width of Blue CHannel output */
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#define GC1R_WGCH GENMASK(7, 4) /* Width of Green Channel output */
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#define GC1R_WRCH GENMASK(11, 8) /* Width of Red Channel output */
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#define GC1R_PBEN BIT(12) /* Precise Blending ENable */
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#define GC1R_DT GENMASK(15, 14) /* Dithering Technique */
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#define GC1R_GCT GENMASK(19, 17) /* Gamma Correction Technique */
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#define GC1R_SHREN BIT(21) /* SHadow Registers ENabled */
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#define GC1R_BCP BIT(22) /* Background Colour Programmable */
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#define GC1R_BBEN BIT(23) /* Background Blending ENabled */
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#define GC1R_LNIP BIT(24) /* Line Number IRQ Position */
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#define GC1R_TP BIT(25) /* Timing Programmable */
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#define GC1R_IPP BIT(26) /* IRQ Polarity Programmable */
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#define GC1R_SPP BIT(27) /* Sync Polarity Programmable */
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#define GC1R_DWP BIT(28) /* Dither Width Programmable */
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#define GC1R_STREN BIT(29) /* STatus Registers ENabled */
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#define GC1R_BMEN BIT(31) /* Blind Mode ENabled */
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#define GC2R_EDCA BIT(0) /* External Display Control Ability */
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#define GC2R_STSAEN BIT(1) /* Slave Timing Sync Ability ENabled */
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#define GC2R_DVAEN BIT(2) /* Dual-View Ability ENabled */
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#define GC2R_DPAEN BIT(3) /* Dual-Port Ability ENabled */
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#define GC2R_BW GENMASK(6, 4) /* Bus Width (log2 of nb of bytes) */
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#define GC2R_EDCEN BIT(7) /* External Display Control ENabled */
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#define SRCR_IMR BIT(0) /* IMmediate Reload */
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#define SRCR_VBR BIT(1) /* Vertical Blanking Reload */
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#define BCCR_BCBLACK 0x00 /* Background Color BLACK */
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#define BCCR_BCBLUE GENMASK(7, 0) /* Background Color BLUE */
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#define BCCR_BCGREEN GENMASK(15, 8) /* Background Color GREEN */
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#define BCCR_BCRED GENMASK(23, 16) /* Background Color RED */
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#define BCCR_BCWHITE GENMASK(23, 0) /* Background Color WHITE */
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#define IER_LIE BIT(0) /* Line Interrupt Enable */
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#define IER_FUIE BIT(1) /* Fifo Underrun Interrupt Enable */
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#define IER_TERRIE BIT(2) /* Transfer ERRor Interrupt Enable */
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#define IER_RRIE BIT(3) /* Register Reload Interrupt enable */
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#define ISR_LIF BIT(0) /* Line Interrupt Flag */
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#define ISR_FUIF BIT(1) /* Fifo Underrun Interrupt Flag */
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#define ISR_TERRIF BIT(2) /* Transfer ERRor Interrupt Flag */
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#define ISR_RRIF BIT(3) /* Register Reload Interrupt Flag */
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#define LXCR_LEN BIT(0) /* Layer ENable */
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#define LXCR_COLKEN BIT(1) /* Color Keying Enable */
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#define LXCR_CLUTEN BIT(4) /* Color Look-Up Table ENable */
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#define LXWHPCR_WHSTPOS GENMASK(11, 0) /* Window Horizontal StarT POSition */
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#define LXWHPCR_WHSPPOS GENMASK(27, 16) /* Window Horizontal StoP POSition */
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#define LXWVPCR_WVSTPOS GENMASK(10, 0) /* Window Vertical StarT POSition */
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#define LXWVPCR_WVSPPOS GENMASK(26, 16) /* Window Vertical StoP POSition */
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#define LXPFCR_PF GENMASK(2, 0) /* Pixel Format */
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#define LXCACR_CONSTA GENMASK(7, 0) /* CONSTant Alpha */
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#define LXBFCR_BF2 GENMASK(2, 0) /* Blending Factor 2 */
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#define LXBFCR_BF1 GENMASK(10, 8) /* Blending Factor 1 */
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#define LXCFBLR_CFBLL GENMASK(12, 0) /* Color Frame Buffer Line Length */
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#define LXCFBLR_CFBP GENMASK(28, 16) /* Color Frame Buffer Pitch in bytes */
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#define LXCFBLNR_CFBLN GENMASK(10, 0) /* Color Frame Buffer Line Number */
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#define CONSTA_MAX 0xFF /* CONSTant Alpha MAX= 1.0 */
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#define BF1_PAXCA 0x600 /* Pixel Alpha x Constant Alpha */
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#define BF1_CA 0x400 /* Constant Alpha */
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#define BF2_1PAXCA 0x007 /* 1 - (Pixel Alpha x Constant Alpha) */
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#define BF2_1CA 0x005 /* 1 - Constant Alpha */
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#define NB_PF 8 /* Max nb of HW pixel format */
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enum ltdc_pix_fmt {
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PF_NONE,
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/* RGB formats */
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PF_ARGB8888, /* ARGB [32 bits] */
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PF_RGBA8888, /* RGBA [32 bits] */
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PF_RGB888, /* RGB [24 bits] */
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PF_RGB565, /* RGB [16 bits] */
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PF_ARGB1555, /* ARGB A:1 bit RGB:15 bits [16 bits] */
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PF_ARGB4444, /* ARGB A:4 bits R/G/B: 4 bits each [16 bits] */
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/* Indexed formats */
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PF_L8, /* Indexed 8 bits [8 bits] */
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PF_AL44, /* Alpha:4 bits + indexed 4 bits [8 bits] */
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PF_AL88 /* Alpha:8 bits + indexed 8 bits [16 bits] */
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};
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/* The index gives the encoding of the pixel format for an HW version */
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static const enum ltdc_pix_fmt ltdc_pix_fmt_a0[NB_PF] = {
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PF_ARGB8888, /* 0x00 */
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PF_RGB888, /* 0x01 */
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PF_RGB565, /* 0x02 */
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PF_ARGB1555, /* 0x03 */
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PF_ARGB4444, /* 0x04 */
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PF_L8, /* 0x05 */
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PF_AL44, /* 0x06 */
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PF_AL88 /* 0x07 */
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};
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static const enum ltdc_pix_fmt ltdc_pix_fmt_a1[NB_PF] = {
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PF_ARGB8888, /* 0x00 */
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PF_RGB888, /* 0x01 */
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PF_RGB565, /* 0x02 */
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PF_RGBA8888, /* 0x03 */
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PF_AL44, /* 0x04 */
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PF_L8, /* 0x05 */
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PF_ARGB1555, /* 0x06 */
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PF_ARGB4444 /* 0x07 */
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};
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static inline u32 reg_read(void __iomem *base, u32 reg)
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{
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return readl_relaxed(base + reg);
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}
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static inline void reg_write(void __iomem *base, u32 reg, u32 val)
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{
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writel_relaxed(val, base + reg);
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}
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static inline void reg_set(void __iomem *base, u32 reg, u32 mask)
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{
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reg_write(base, reg, reg_read(base, reg) | mask);
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}
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static inline void reg_clear(void __iomem *base, u32 reg, u32 mask)
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{
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reg_write(base, reg, reg_read(base, reg) & ~mask);
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}
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static inline void reg_update_bits(void __iomem *base, u32 reg, u32 mask,
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u32 val)
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{
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reg_write(base, reg, (reg_read(base, reg) & ~mask) | val);
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}
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static inline struct ltdc_device *crtc_to_ltdc(struct drm_crtc *crtc)
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{
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return (struct ltdc_device *)crtc->dev->dev_private;
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}
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static inline struct ltdc_device *plane_to_ltdc(struct drm_plane *plane)
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{
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return (struct ltdc_device *)plane->dev->dev_private;
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}
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static inline struct ltdc_device *encoder_to_ltdc(struct drm_encoder *enc)
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{
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return (struct ltdc_device *)enc->dev->dev_private;
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}
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static inline enum ltdc_pix_fmt to_ltdc_pixelformat(u32 drm_fmt)
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{
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enum ltdc_pix_fmt pf;
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switch (drm_fmt) {
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case DRM_FORMAT_ARGB8888:
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case DRM_FORMAT_XRGB8888:
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pf = PF_ARGB8888;
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break;
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case DRM_FORMAT_RGBA8888:
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case DRM_FORMAT_RGBX8888:
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pf = PF_RGBA8888;
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break;
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case DRM_FORMAT_RGB888:
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pf = PF_RGB888;
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break;
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case DRM_FORMAT_RGB565:
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pf = PF_RGB565;
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break;
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case DRM_FORMAT_ARGB1555:
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case DRM_FORMAT_XRGB1555:
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pf = PF_ARGB1555;
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break;
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case DRM_FORMAT_ARGB4444:
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case DRM_FORMAT_XRGB4444:
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pf = PF_ARGB4444;
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break;
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case DRM_FORMAT_C8:
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pf = PF_L8;
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break;
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default:
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pf = PF_NONE;
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break;
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/* Note: There are no DRM_FORMAT for AL44 and AL88 */
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}
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return pf;
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}
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static inline u32 to_drm_pixelformat(enum ltdc_pix_fmt pf)
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{
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switch (pf) {
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case PF_ARGB8888:
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return DRM_FORMAT_ARGB8888;
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case PF_RGBA8888:
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return DRM_FORMAT_RGBA8888;
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case PF_RGB888:
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return DRM_FORMAT_RGB888;
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case PF_RGB565:
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return DRM_FORMAT_RGB565;
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case PF_ARGB1555:
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return DRM_FORMAT_ARGB1555;
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case PF_ARGB4444:
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return DRM_FORMAT_ARGB4444;
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case PF_L8:
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return DRM_FORMAT_C8;
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case PF_AL44: /* No DRM support */
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case PF_AL88: /* No DRM support */
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case PF_NONE:
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default:
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return 0;
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}
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}
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static irqreturn_t ltdc_irq_thread(int irq, void *arg)
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{
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struct drm_device *ddev = arg;
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struct ltdc_device *ldev = ddev->dev_private;
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struct drm_crtc *crtc = drm_crtc_from_index(ddev, 0);
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/* Line IRQ : trigger the vblank event */
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if (ldev->irq_status & ISR_LIF)
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drm_crtc_handle_vblank(crtc);
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/* Save FIFO Underrun & Transfer Error status */
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mutex_lock(&ldev->err_lock);
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if (ldev->irq_status & ISR_FUIF)
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ldev->error_status |= ISR_FUIF;
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if (ldev->irq_status & ISR_TERRIF)
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ldev->error_status |= ISR_TERRIF;
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mutex_unlock(&ldev->err_lock);
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return IRQ_HANDLED;
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}
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static irqreturn_t ltdc_irq(int irq, void *arg)
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{
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struct drm_device *ddev = arg;
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struct ltdc_device *ldev = ddev->dev_private;
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/* Read & Clear the interrupt status */
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ldev->irq_status = reg_read(ldev->regs, LTDC_ISR);
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reg_write(ldev->regs, LTDC_ICR, ldev->irq_status);
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return IRQ_WAKE_THREAD;
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}
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/*
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* DRM_CRTC
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*/
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static void ltdc_crtc_atomic_enable(struct drm_crtc *crtc,
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struct drm_crtc_state *old_state)
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{
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struct ltdc_device *ldev = crtc_to_ltdc(crtc);
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DRM_DEBUG_DRIVER("\n");
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/* Sets the background color value */
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reg_write(ldev->regs, LTDC_BCCR, BCCR_BCBLACK);
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/* Enable IRQ */
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reg_set(ldev->regs, LTDC_IER, IER_RRIE | IER_FUIE | IER_TERRIE);
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/* Immediately commit the planes */
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reg_set(ldev->regs, LTDC_SRCR, SRCR_IMR);
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/* Enable LTDC */
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reg_set(ldev->regs, LTDC_GCR, GCR_LTDCEN);
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drm_crtc_vblank_on(crtc);
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}
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static void ltdc_crtc_atomic_disable(struct drm_crtc *crtc,
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struct drm_crtc_state *old_state)
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{
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struct ltdc_device *ldev = crtc_to_ltdc(crtc);
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DRM_DEBUG_DRIVER("\n");
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drm_crtc_vblank_off(crtc);
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/* disable LTDC */
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reg_clear(ldev->regs, LTDC_GCR, GCR_LTDCEN);
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/* disable IRQ */
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reg_clear(ldev->regs, LTDC_IER, IER_RRIE | IER_FUIE | IER_TERRIE);
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/* immediately commit disable of layers before switching off LTDC */
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reg_set(ldev->regs, LTDC_SRCR, SRCR_IMR);
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}
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static void ltdc_crtc_mode_set_nofb(struct drm_crtc *crtc)
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{
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struct ltdc_device *ldev = crtc_to_ltdc(crtc);
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struct drm_display_mode *mode = &crtc->state->adjusted_mode;
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struct videomode vm;
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int rate = mode->clock * 1000;
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u32 hsync, vsync, accum_hbp, accum_vbp, accum_act_w, accum_act_h;
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u32 total_width, total_height;
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u32 val;
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drm_display_mode_to_videomode(mode, &vm);
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DRM_DEBUG_DRIVER("CRTC:%d mode:%s\n", crtc->base.id, mode->name);
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DRM_DEBUG_DRIVER("Video mode: %dx%d", vm.hactive, vm.vactive);
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DRM_DEBUG_DRIVER(" hfp %d hbp %d hsl %d vfp %d vbp %d vsl %d\n",
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vm.hfront_porch, vm.hback_porch, vm.hsync_len,
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vm.vfront_porch, vm.vback_porch, vm.vsync_len);
|
|
|
|
/* Convert video timings to ltdc timings */
|
|
hsync = vm.hsync_len - 1;
|
|
vsync = vm.vsync_len - 1;
|
|
accum_hbp = hsync + vm.hback_porch;
|
|
accum_vbp = vsync + vm.vback_porch;
|
|
accum_act_w = accum_hbp + vm.hactive;
|
|
accum_act_h = accum_vbp + vm.vactive;
|
|
total_width = accum_act_w + vm.hfront_porch;
|
|
total_height = accum_act_h + vm.vfront_porch;
|
|
|
|
clk_disable(ldev->pixel_clk);
|
|
|
|
if (clk_set_rate(ldev->pixel_clk, rate) < 0) {
|
|
DRM_ERROR("Cannot set rate (%dHz) for pixel clk\n", rate);
|
|
return;
|
|
}
|
|
|
|
clk_enable(ldev->pixel_clk);
|
|
|
|
/* Configures the HS, VS, DE and PC polarities. Default Active Low */
|
|
val = 0;
|
|
|
|
if (vm.flags & DISPLAY_FLAGS_HSYNC_HIGH)
|
|
val |= GCR_HSPOL;
|
|
|
|
if (vm.flags & DISPLAY_FLAGS_VSYNC_HIGH)
|
|
val |= GCR_VSPOL;
|
|
|
|
if (vm.flags & DISPLAY_FLAGS_DE_HIGH)
|
|
val |= GCR_DEPOL;
|
|
|
|
if (vm.flags & DISPLAY_FLAGS_PIXDATA_NEGEDGE)
|
|
val |= GCR_PCPOL;
|
|
|
|
reg_update_bits(ldev->regs, LTDC_GCR,
|
|
GCR_HSPOL | GCR_VSPOL | GCR_DEPOL | GCR_PCPOL, val);
|
|
|
|
/* Set Synchronization size */
|
|
val = (hsync << 16) | vsync;
|
|
reg_update_bits(ldev->regs, LTDC_SSCR, SSCR_VSH | SSCR_HSW, val);
|
|
|
|
/* Set Accumulated Back porch */
|
|
val = (accum_hbp << 16) | accum_vbp;
|
|
reg_update_bits(ldev->regs, LTDC_BPCR, BPCR_AVBP | BPCR_AHBP, val);
|
|
|
|
/* Set Accumulated Active Width */
|
|
val = (accum_act_w << 16) | accum_act_h;
|
|
reg_update_bits(ldev->regs, LTDC_AWCR, AWCR_AAW | AWCR_AAH, val);
|
|
|
|
/* Set total width & height */
|
|
val = (total_width << 16) | total_height;
|
|
reg_update_bits(ldev->regs, LTDC_TWCR, TWCR_TOTALH | TWCR_TOTALW, val);
|
|
|
|
reg_write(ldev->regs, LTDC_LIPCR, (accum_act_h + 1));
|
|
}
|
|
|
|
static void ltdc_crtc_atomic_flush(struct drm_crtc *crtc,
|
|
struct drm_crtc_state *old_crtc_state)
|
|
{
|
|
struct ltdc_device *ldev = crtc_to_ltdc(crtc);
|
|
struct drm_pending_vblank_event *event = crtc->state->event;
|
|
|
|
DRM_DEBUG_ATOMIC("\n");
|
|
|
|
/* Commit shadow registers = update planes at next vblank */
|
|
reg_set(ldev->regs, LTDC_SRCR, SRCR_VBR);
|
|
|
|
if (event) {
|
|
crtc->state->event = NULL;
|
|
|
|
spin_lock_irq(&crtc->dev->event_lock);
|
|
if (drm_crtc_vblank_get(crtc) == 0)
|
|
drm_crtc_arm_vblank_event(crtc, event);
|
|
else
|
|
drm_crtc_send_vblank_event(crtc, event);
|
|
spin_unlock_irq(&crtc->dev->event_lock);
|
|
}
|
|
}
|
|
|
|
static const struct drm_crtc_helper_funcs ltdc_crtc_helper_funcs = {
|
|
.mode_set_nofb = ltdc_crtc_mode_set_nofb,
|
|
.atomic_flush = ltdc_crtc_atomic_flush,
|
|
.atomic_enable = ltdc_crtc_atomic_enable,
|
|
.atomic_disable = ltdc_crtc_atomic_disable,
|
|
};
|
|
|
|
int ltdc_crtc_enable_vblank(struct drm_device *ddev, unsigned int pipe)
|
|
{
|
|
struct ltdc_device *ldev = ddev->dev_private;
|
|
|
|
DRM_DEBUG_DRIVER("\n");
|
|
reg_set(ldev->regs, LTDC_IER, IER_LIE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void ltdc_crtc_disable_vblank(struct drm_device *ddev, unsigned int pipe)
|
|
{
|
|
struct ltdc_device *ldev = ddev->dev_private;
|
|
|
|
DRM_DEBUG_DRIVER("\n");
|
|
reg_clear(ldev->regs, LTDC_IER, IER_LIE);
|
|
}
|
|
|
|
static const struct drm_crtc_funcs ltdc_crtc_funcs = {
|
|
.destroy = drm_crtc_cleanup,
|
|
.set_config = drm_atomic_helper_set_config,
|
|
.page_flip = drm_atomic_helper_page_flip,
|
|
.reset = drm_atomic_helper_crtc_reset,
|
|
.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
|
|
.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
|
|
};
|
|
|
|
/*
|
|
* DRM_PLANE
|
|
*/
|
|
|
|
static int ltdc_plane_atomic_check(struct drm_plane *plane,
|
|
struct drm_plane_state *state)
|
|
{
|
|
struct drm_framebuffer *fb = state->fb;
|
|
u32 src_x, src_y, src_w, src_h;
|
|
|
|
DRM_DEBUG_DRIVER("\n");
|
|
|
|
if (!fb)
|
|
return 0;
|
|
|
|
/* convert src_ from 16:16 format */
|
|
src_x = state->src_x >> 16;
|
|
src_y = state->src_y >> 16;
|
|
src_w = state->src_w >> 16;
|
|
src_h = state->src_h >> 16;
|
|
|
|
/* Reject scaling */
|
|
if (src_w != state->crtc_w || src_h != state->crtc_h) {
|
|
DRM_ERROR("Scaling is not supported");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ltdc_plane_atomic_update(struct drm_plane *plane,
|
|
struct drm_plane_state *oldstate)
|
|
{
|
|
struct ltdc_device *ldev = plane_to_ltdc(plane);
|
|
struct drm_plane_state *state = plane->state;
|
|
struct drm_framebuffer *fb = state->fb;
|
|
u32 lofs = plane->index * LAY_OFS;
|
|
u32 x0 = state->crtc_x;
|
|
u32 x1 = state->crtc_x + state->crtc_w - 1;
|
|
u32 y0 = state->crtc_y;
|
|
u32 y1 = state->crtc_y + state->crtc_h - 1;
|
|
u32 src_x, src_y, src_w, src_h;
|
|
u32 val, pitch_in_bytes, line_length, paddr, ahbp, avbp, bpcr;
|
|
enum ltdc_pix_fmt pf;
|
|
|
|
if (!state->crtc || !fb) {
|
|
DRM_DEBUG_DRIVER("fb or crtc NULL");
|
|
return;
|
|
}
|
|
|
|
/* convert src_ from 16:16 format */
|
|
src_x = state->src_x >> 16;
|
|
src_y = state->src_y >> 16;
|
|
src_w = state->src_w >> 16;
|
|
src_h = state->src_h >> 16;
|
|
|
|
DRM_DEBUG_DRIVER("plane:%d fb:%d (%dx%d)@(%d,%d) -> (%dx%d)@(%d,%d)\n",
|
|
plane->base.id, fb->base.id,
|
|
src_w, src_h, src_x, src_y,
|
|
state->crtc_w, state->crtc_h,
|
|
state->crtc_x, state->crtc_y);
|
|
|
|
bpcr = reg_read(ldev->regs, LTDC_BPCR);
|
|
ahbp = (bpcr & BPCR_AHBP) >> 16;
|
|
avbp = bpcr & BPCR_AVBP;
|
|
|
|
/* Configures the horizontal start and stop position */
|
|
val = ((x1 + 1 + ahbp) << 16) + (x0 + 1 + ahbp);
|
|
reg_update_bits(ldev->regs, LTDC_L1WHPCR + lofs,
|
|
LXWHPCR_WHSTPOS | LXWHPCR_WHSPPOS, val);
|
|
|
|
/* Configures the vertical start and stop position */
|
|
val = ((y1 + 1 + avbp) << 16) + (y0 + 1 + avbp);
|
|
reg_update_bits(ldev->regs, LTDC_L1WVPCR + lofs,
|
|
LXWVPCR_WVSTPOS | LXWVPCR_WVSPPOS, val);
|
|
|
|
/* Specifies the pixel format */
|
|
pf = to_ltdc_pixelformat(fb->format->format);
|
|
for (val = 0; val < NB_PF; val++)
|
|
if (ldev->caps.pix_fmt_hw[val] == pf)
|
|
break;
|
|
|
|
if (val == NB_PF) {
|
|
DRM_ERROR("Pixel format %.4s not supported\n",
|
|
(char *)&fb->format->format);
|
|
val = 0; /* set by default ARGB 32 bits */
|
|
}
|
|
reg_update_bits(ldev->regs, LTDC_L1PFCR + lofs, LXPFCR_PF, val);
|
|
|
|
/* Configures the color frame buffer pitch in bytes & line length */
|
|
pitch_in_bytes = fb->pitches[0];
|
|
line_length = drm_format_plane_cpp(fb->format->format, 0) *
|
|
(x1 - x0 + 1) + (ldev->caps.bus_width >> 3) - 1;
|
|
val = ((pitch_in_bytes << 16) | line_length);
|
|
reg_update_bits(ldev->regs, LTDC_L1CFBLR + lofs,
|
|
LXCFBLR_CFBLL | LXCFBLR_CFBP, val);
|
|
|
|
/* Specifies the constant alpha value */
|
|
val = CONSTA_MAX;
|
|
reg_update_bits(ldev->regs, LTDC_L1CACR + lofs, LXCACR_CONSTA, val);
|
|
|
|
/* Specifies the blending factors */
|
|
val = BF1_PAXCA | BF2_1PAXCA;
|
|
reg_update_bits(ldev->regs, LTDC_L1BFCR + lofs,
|
|
LXBFCR_BF2 | LXBFCR_BF1, val);
|
|
|
|
/* Configures the frame buffer line number */
|
|
val = y1 - y0 + 1;
|
|
reg_update_bits(ldev->regs, LTDC_L1CFBLNR + lofs, LXCFBLNR_CFBLN, val);
|
|
|
|
/* Sets the FB address */
|
|
paddr = (u32)drm_fb_cma_get_gem_addr(fb, state, 0);
|
|
|
|
DRM_DEBUG_DRIVER("fb: phys 0x%08x", paddr);
|
|
reg_write(ldev->regs, LTDC_L1CFBAR + lofs, paddr);
|
|
|
|
/* Enable layer and CLUT if needed */
|
|
val = fb->format->format == DRM_FORMAT_C8 ? LXCR_CLUTEN : 0;
|
|
val |= LXCR_LEN;
|
|
reg_update_bits(ldev->regs, LTDC_L1CR + lofs,
|
|
LXCR_LEN | LXCR_CLUTEN, val);
|
|
|
|
mutex_lock(&ldev->err_lock);
|
|
if (ldev->error_status & ISR_FUIF) {
|
|
DRM_DEBUG_DRIVER("Fifo underrun\n");
|
|
ldev->error_status &= ~ISR_FUIF;
|
|
}
|
|
if (ldev->error_status & ISR_TERRIF) {
|
|
DRM_DEBUG_DRIVER("Transfer error\n");
|
|
ldev->error_status &= ~ISR_TERRIF;
|
|
}
|
|
mutex_unlock(&ldev->err_lock);
|
|
}
|
|
|
|
static void ltdc_plane_atomic_disable(struct drm_plane *plane,
|
|
struct drm_plane_state *oldstate)
|
|
{
|
|
struct ltdc_device *ldev = plane_to_ltdc(plane);
|
|
u32 lofs = plane->index * LAY_OFS;
|
|
|
|
/* disable layer */
|
|
reg_clear(ldev->regs, LTDC_L1CR + lofs, LXCR_LEN);
|
|
|
|
DRM_DEBUG_DRIVER("CRTC:%d plane:%d\n",
|
|
oldstate->crtc->base.id, plane->base.id);
|
|
}
|
|
|
|
static const struct drm_plane_funcs ltdc_plane_funcs = {
|
|
.update_plane = drm_atomic_helper_update_plane,
|
|
.disable_plane = drm_atomic_helper_disable_plane,
|
|
.destroy = drm_plane_cleanup,
|
|
.reset = drm_atomic_helper_plane_reset,
|
|
.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
|
|
.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
|
|
};
|
|
|
|
static const struct drm_plane_helper_funcs ltdc_plane_helper_funcs = {
|
|
.atomic_check = ltdc_plane_atomic_check,
|
|
.atomic_update = ltdc_plane_atomic_update,
|
|
.atomic_disable = ltdc_plane_atomic_disable,
|
|
};
|
|
|
|
static struct drm_plane *ltdc_plane_create(struct drm_device *ddev,
|
|
enum drm_plane_type type)
|
|
{
|
|
unsigned long possible_crtcs = CRTC_MASK;
|
|
struct ltdc_device *ldev = ddev->dev_private;
|
|
struct device *dev = ddev->dev;
|
|
struct drm_plane *plane;
|
|
unsigned int i, nb_fmt = 0;
|
|
u32 formats[NB_PF];
|
|
u32 drm_fmt;
|
|
int ret;
|
|
|
|
/* Get supported pixel formats */
|
|
for (i = 0; i < NB_PF; i++) {
|
|
drm_fmt = to_drm_pixelformat(ldev->caps.pix_fmt_hw[i]);
|
|
if (!drm_fmt)
|
|
continue;
|
|
formats[nb_fmt++] = drm_fmt;
|
|
}
|
|
|
|
plane = devm_kzalloc(dev, sizeof(*plane), GFP_KERNEL);
|
|
if (!plane)
|
|
return 0;
|
|
|
|
ret = drm_universal_plane_init(ddev, plane, possible_crtcs,
|
|
<dc_plane_funcs, formats, nb_fmt,
|
|
NULL, type, NULL);
|
|
if (ret < 0)
|
|
return 0;
|
|
|
|
drm_plane_helper_add(plane, <dc_plane_helper_funcs);
|
|
|
|
DRM_DEBUG_DRIVER("plane:%d created\n", plane->base.id);
|
|
|
|
return plane;
|
|
}
|
|
|
|
static void ltdc_plane_destroy_all(struct drm_device *ddev)
|
|
{
|
|
struct drm_plane *plane, *plane_temp;
|
|
|
|
list_for_each_entry_safe(plane, plane_temp,
|
|
&ddev->mode_config.plane_list, head)
|
|
drm_plane_cleanup(plane);
|
|
}
|
|
|
|
static int ltdc_crtc_init(struct drm_device *ddev, struct drm_crtc *crtc)
|
|
{
|
|
struct ltdc_device *ldev = ddev->dev_private;
|
|
struct drm_plane *primary, *overlay;
|
|
unsigned int i;
|
|
int ret;
|
|
|
|
primary = ltdc_plane_create(ddev, DRM_PLANE_TYPE_PRIMARY);
|
|
if (!primary) {
|
|
DRM_ERROR("Can not create primary plane\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
ret = drm_crtc_init_with_planes(ddev, crtc, primary, NULL,
|
|
<dc_crtc_funcs, NULL);
|
|
if (ret) {
|
|
DRM_ERROR("Can not initialize CRTC\n");
|
|
goto cleanup;
|
|
}
|
|
|
|
drm_crtc_helper_add(crtc, <dc_crtc_helper_funcs);
|
|
|
|
DRM_DEBUG_DRIVER("CRTC:%d created\n", crtc->base.id);
|
|
|
|
/* Add planes. Note : the first layer is used by primary plane */
|
|
for (i = 1; i < ldev->caps.nb_layers; i++) {
|
|
overlay = ltdc_plane_create(ddev, DRM_PLANE_TYPE_OVERLAY);
|
|
if (!overlay) {
|
|
ret = -ENOMEM;
|
|
DRM_ERROR("Can not create overlay plane %d\n", i);
|
|
goto cleanup;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
|
|
cleanup:
|
|
ltdc_plane_destroy_all(ddev);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* DRM_ENCODER
|
|
*/
|
|
|
|
static const struct drm_encoder_funcs ltdc_encoder_funcs = {
|
|
.destroy = drm_encoder_cleanup,
|
|
};
|
|
|
|
static int ltdc_encoder_init(struct drm_device *ddev, struct drm_bridge *bridge)
|
|
{
|
|
struct drm_encoder *encoder;
|
|
int ret;
|
|
|
|
encoder = devm_kzalloc(ddev->dev, sizeof(*encoder), GFP_KERNEL);
|
|
if (!encoder)
|
|
return -ENOMEM;
|
|
|
|
encoder->possible_crtcs = CRTC_MASK;
|
|
encoder->possible_clones = 0; /* No cloning support */
|
|
|
|
drm_encoder_init(ddev, encoder, <dc_encoder_funcs,
|
|
DRM_MODE_ENCODER_DPI, NULL);
|
|
|
|
ret = drm_bridge_attach(encoder, bridge, NULL);
|
|
if (ret) {
|
|
drm_encoder_cleanup(encoder);
|
|
return -EINVAL;
|
|
}
|
|
|
|
DRM_DEBUG_DRIVER("Bridge encoder:%d created\n", encoder->base.id);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ltdc_get_caps(struct drm_device *ddev)
|
|
{
|
|
struct ltdc_device *ldev = ddev->dev_private;
|
|
u32 bus_width_log2, lcr, gc2r;
|
|
|
|
/* at least 1 layer must be managed */
|
|
lcr = reg_read(ldev->regs, LTDC_LCR);
|
|
|
|
ldev->caps.nb_layers = max_t(int, lcr, 1);
|
|
|
|
/* set data bus width */
|
|
gc2r = reg_read(ldev->regs, LTDC_GC2R);
|
|
bus_width_log2 = (gc2r & GC2R_BW) >> 4;
|
|
ldev->caps.bus_width = 8 << bus_width_log2;
|
|
ldev->caps.hw_version = reg_read(ldev->regs, LTDC_IDR);
|
|
|
|
switch (ldev->caps.hw_version) {
|
|
case HWVER_10200:
|
|
case HWVER_10300:
|
|
ldev->caps.reg_ofs = REG_OFS_NONE;
|
|
ldev->caps.pix_fmt_hw = ltdc_pix_fmt_a0;
|
|
break;
|
|
case HWVER_20101:
|
|
ldev->caps.reg_ofs = REG_OFS_4;
|
|
ldev->caps.pix_fmt_hw = ltdc_pix_fmt_a1;
|
|
break;
|
|
default:
|
|
return -ENODEV;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ltdc_load(struct drm_device *ddev)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(ddev->dev);
|
|
struct ltdc_device *ldev = ddev->dev_private;
|
|
struct device *dev = ddev->dev;
|
|
struct device_node *np = dev->of_node;
|
|
struct drm_bridge *bridge[MAX_ENDPOINTS] = {NULL};
|
|
struct drm_panel *panel[MAX_ENDPOINTS] = {NULL};
|
|
struct drm_crtc *crtc;
|
|
struct reset_control *rstc;
|
|
struct resource *res;
|
|
int irq, ret, i, endpoint_not_ready = -ENODEV;
|
|
|
|
DRM_DEBUG_DRIVER("\n");
|
|
|
|
/* Get endpoints if any */
|
|
for (i = 0; i < MAX_ENDPOINTS; i++) {
|
|
ret = drm_of_find_panel_or_bridge(np, 0, i, &panel[i],
|
|
&bridge[i]);
|
|
|
|
/*
|
|
* If at least one endpoint is ready, continue probing,
|
|
* else if at least one endpoint is -EPROBE_DEFER and
|
|
* there is no previous ready endpoints, defer probing.
|
|
*/
|
|
if (!ret)
|
|
endpoint_not_ready = 0;
|
|
else if (ret == -EPROBE_DEFER && endpoint_not_ready)
|
|
endpoint_not_ready = -EPROBE_DEFER;
|
|
}
|
|
|
|
if (endpoint_not_ready)
|
|
return endpoint_not_ready;
|
|
|
|
rstc = devm_reset_control_get_exclusive(dev, NULL);
|
|
|
|
mutex_init(&ldev->err_lock);
|
|
|
|
ldev->pixel_clk = devm_clk_get(dev, "lcd");
|
|
if (IS_ERR(ldev->pixel_clk)) {
|
|
DRM_ERROR("Unable to get lcd clock\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (clk_prepare_enable(ldev->pixel_clk)) {
|
|
DRM_ERROR("Unable to prepare pixel clock\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
if (!res) {
|
|
DRM_ERROR("Unable to get resource\n");
|
|
ret = -ENODEV;
|
|
goto err;
|
|
}
|
|
|
|
ldev->regs = devm_ioremap_resource(dev, res);
|
|
if (IS_ERR(ldev->regs)) {
|
|
DRM_ERROR("Unable to get ltdc registers\n");
|
|
ret = PTR_ERR(ldev->regs);
|
|
goto err;
|
|
}
|
|
|
|
for (i = 0; i < MAX_IRQ; i++) {
|
|
irq = platform_get_irq(pdev, i);
|
|
if (irq < 0)
|
|
continue;
|
|
|
|
ret = devm_request_threaded_irq(dev, irq, ltdc_irq,
|
|
ltdc_irq_thread, IRQF_ONESHOT,
|
|
dev_name(dev), ddev);
|
|
if (ret) {
|
|
DRM_ERROR("Failed to register LTDC interrupt\n");
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
if (!IS_ERR(rstc))
|
|
reset_control_deassert(rstc);
|
|
|
|
/* Disable interrupts */
|
|
reg_clear(ldev->regs, LTDC_IER,
|
|
IER_LIE | IER_RRIE | IER_FUIE | IER_TERRIE);
|
|
|
|
ret = ltdc_get_caps(ddev);
|
|
if (ret) {
|
|
DRM_ERROR("hardware identifier (0x%08x) not supported!\n",
|
|
ldev->caps.hw_version);
|
|
goto err;
|
|
}
|
|
|
|
DRM_INFO("ltdc hw version 0x%08x - ready\n", ldev->caps.hw_version);
|
|
|
|
/* Add endpoints panels or bridges if any */
|
|
for (i = 0; i < MAX_ENDPOINTS; i++) {
|
|
if (panel[i]) {
|
|
bridge[i] = drm_panel_bridge_add(panel[i],
|
|
DRM_MODE_CONNECTOR_DPI);
|
|
if (IS_ERR(bridge[i])) {
|
|
DRM_ERROR("panel-bridge endpoint %d\n", i);
|
|
ret = PTR_ERR(bridge[i]);
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
if (bridge[i]) {
|
|
ret = ltdc_encoder_init(ddev, bridge[i]);
|
|
if (ret) {
|
|
DRM_ERROR("init encoder endpoint %d\n", i);
|
|
goto err;
|
|
}
|
|
}
|
|
}
|
|
|
|
crtc = devm_kzalloc(dev, sizeof(*crtc), GFP_KERNEL);
|
|
if (!crtc) {
|
|
DRM_ERROR("Failed to allocate crtc\n");
|
|
ret = -ENOMEM;
|
|
goto err;
|
|
}
|
|
|
|
ret = ltdc_crtc_init(ddev, crtc);
|
|
if (ret) {
|
|
DRM_ERROR("Failed to init crtc\n");
|
|
goto err;
|
|
}
|
|
|
|
ret = drm_vblank_init(ddev, NB_CRTC);
|
|
if (ret) {
|
|
DRM_ERROR("Failed calling drm_vblank_init()\n");
|
|
goto err;
|
|
}
|
|
|
|
/* Allow usage of vblank without having to call drm_irq_install */
|
|
ddev->irq_enabled = 1;
|
|
|
|
return 0;
|
|
|
|
err:
|
|
for (i = 0; i < MAX_ENDPOINTS; i++)
|
|
drm_panel_bridge_remove(bridge[i]);
|
|
|
|
clk_disable_unprepare(ldev->pixel_clk);
|
|
|
|
return ret;
|
|
}
|
|
|
|
void ltdc_unload(struct drm_device *ddev)
|
|
{
|
|
struct ltdc_device *ldev = ddev->dev_private;
|
|
int i;
|
|
|
|
DRM_DEBUG_DRIVER("\n");
|
|
|
|
for (i = 0; i < MAX_ENDPOINTS; i++)
|
|
drm_of_panel_bridge_remove(ddev->dev->of_node, 0, i);
|
|
|
|
clk_disable_unprepare(ldev->pixel_clk);
|
|
}
|
|
|
|
MODULE_AUTHOR("Philippe Cornu <philippe.cornu@st.com>");
|
|
MODULE_AUTHOR("Yannick Fertre <yannick.fertre@st.com>");
|
|
MODULE_AUTHOR("Fabien Dessenne <fabien.dessenne@st.com>");
|
|
MODULE_AUTHOR("Mickael Reulier <mickael.reulier@st.com>");
|
|
MODULE_DESCRIPTION("STMicroelectronics ST DRM LTDC driver");
|
|
MODULE_LICENSE("GPL v2");
|