Message ID | 20190617073252.27810-50-jagan@amarulasolutions.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show
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bh=RBCV64wyEGkRjSj+SOeXha5NbkhBngESdnqw+b6RGoY=; b=qLghR8DF5xiYNLxtE3CIEyYSyuaCTOAylRCpE9c2FKgbY3au8w0DspcwcFTzt1xH1P Vmt9Dt8YrdmAqc8RtT1VSJnnxbrAV0YQQI4y0jTdn6A71ps0d2O80aqkn19c4QQuYSbk MNXAIarBy/8/PXjmZW6TBjysFsJ1b6yllRIlAf7ql2DYNFGLbYqRwM9kvq0JFnVL2NzZ zx+5WDO4vLm4cTTcPazWnLL22nk4p4JUk/r0KXqb+KoOb7WKUZQGV3f1XfjdlALVVs6o 0nFTcNYsmV/+OB+eYJ8jQMwKAKV87UUplDg0Gryo7cF4jT5ZB1gcufl29wUm6euYMv+a Q98g== X-Gm-Message-State: APjAAAXDgrMcu71JvH+xPR5/aPogEq/O5mVe63y75jnivCIjdLPMALU1 Yjn5zfp6MsyDOf03oX+C08A8WQ== X-Google-Smtp-Source: APXvYqxkOdXApgexcoS0LcdFMq9Iz8qxiMrbnYKoHwS2IZWLv0eKpnHTV2JH1bYbwRKVD1rxm+0HiA== X-Received: by 2002:a63:68c5:: with SMTP id d188mr48898815pgc.429.1560757144661; Mon, 17 Jun 2019 00:39:04 -0700 (PDT) Received: from localhost.localdomain ([49.206.203.245]) by smtp.gmail.com with ESMTPSA id m41sm15205998pje.18.2019.06.17.00.39.01 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 17 Jun 2019 00:39:04 -0700 (PDT) From: Jagan Teki <jagan@amarulasolutions.com> To: Simon Glass <sjg@chromium.org>, Philipp Tomsich <philipp.tomsich@theobroma-systems.com>, Kever Yang <kever.yang@rock-chips.com>, YouMin Chen <cym@rock-chips.com>, u-boot@lists.denx.de Subject: [PATCH v2 49/99] ram: rk3399: Compute stride for 2 channels Date: Mon, 17 Jun 2019 13:02:02 +0530 Message-Id: <20190617073252.27810-50-jagan@amarulasolutions.com> X-Mailer: git-send-email 2.18.0.321.gffc6fa0e3 In-Reply-To: <20190617073252.27810-1-jagan@amarulasolutions.com> References: <20190617073252.27810-1-jagan@amarulasolutions.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190617_003905_337887_06C292D8 X-CRM114-Status: GOOD ( 16.42 ) X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Upstream kernel work for Rockchip platforms <linux-rockchip.lists.infradead.org> List-Unsubscribe: <http://lists.infradead.org/mailman/options/linux-rockchip>, <mailto:linux-rockchip-request@lists.infradead.org?subject=unsubscribe> List-Archive: <http://lists.infradead.org/pipermail/linux-rockchip/> List-Post: <mailto:linux-rockchip@lists.infradead.org> List-Help: <mailto:linux-rockchip-request@lists.infradead.org?subject=help> List-Subscribe: <http://lists.infradead.org/mailman/listinfo/linux-rockchip>, <mailto:linux-rockchip-request@lists.infradead.org?subject=subscribe> Cc: linux-rockchip@lists.infradead.org, gajjar04akash@gmail.com, linux-amarula@amarulasolutions.com, Jagan Teki <jagan@amarulasolutions.com>, Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-rockchip" <linux-rockchip-bounces@lists.infradead.org> Errors-To: linux-rockchip-bounces+patchwork-linux-rockchip=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP |
Series |
ram: rk3399: Add LPDDR4 support
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expand
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diff --git a/drivers/ram/rockchip/sdram_rk3399.c b/drivers/ram/rockchip/sdram_rk3399.c index 231f69b173..75df469952 100644 --- a/drivers/ram/rockchip/sdram_rk3399.c +++ b/drivers/ram/rockchip/sdram_rk3399.c @@ -1180,8 +1180,75 @@ static int switch_to_phy_index1(struct dram_info *dram, return 0; } +static unsigned char calculate_stride(struct rk3399_sdram_params *params) +{ + unsigned int stride = params->base.stride; + unsigned int channel, chinfo = 0; + unsigned int ch_cap[2] = {0, 0}; + u64 cap; + + for (channel = 0; channel < 2; channel++) { + unsigned int cs0_cap = 0; + unsigned int cs1_cap = 0; + struct sdram_cap_info *cap_info = ¶ms->ch[channel].cap_info; + + if (cap_info->col == 0) + continue; + + cs0_cap = (1 << (cap_info->cs0_row + cap_info->col + + cap_info->bk + cap_info->bw - 20)); + if (cap_info->rank > 1) + cs1_cap = cs0_cap >> (cap_info->cs0_row + - cap_info->cs1_row); + if (cap_info->row_3_4) { + cs0_cap = cs0_cap * 3 / 4; + cs1_cap = cs1_cap * 3 / 4; + } + ch_cap[channel] = cs0_cap + cs1_cap; + chinfo |= 1 << channel; + } + + /* stride calculation for 2 channels, default gstride type is 256B */ + if (ch_cap[0] == ch_cap[1]) { + cap = ch_cap[0] + ch_cap[1]; + switch (cap) { + /* 512MB */ + case 512: + stride = 0; + break; + /* 1GB */ + case 1024: + stride = 0x5; + break; + /* + * 768MB + 768MB same as total 2GB memory + * useful space: 0-768MB 1GB-1792MB + */ + case 1536: + /* 2GB */ + case 2048: + stride = 0x9; + break; + /* 1536MB + 1536MB */ + case 3072: + stride = 0x11; + break; + /* 4GB */ + case 4096: + stride = 0xD; + break; + default: + printf("%s: Unable to calculate stride for ", __func__); + print_size((cap * (1 << 20)), " capacity\n"); + break; + } + } + + return stride; +} + static int sdram_init(struct dram_info *dram, - const struct rk3399_sdram_params *params) + struct rk3399_sdram_params *params) { unsigned char dramtype = params->base.dramtype; unsigned int ddr_freq = params->base.ddr_freq; @@ -1229,6 +1296,8 @@ static int sdram_init(struct dram_info *dram, set_ddrconfig(chan, params, channel, params->ch[channel].cap_info.ddrconfig); } + + params->base.stride = calculate_stride(params); dram_all_config(dram, params); switch_to_phy_index1(dram, params);